[meteorite-list] Extinction-level Asteroid Impact Simulation Video
From: Michael Gilmer <michael_w_gilmer_at_meteoritecentral.com>
Date: Fri, 19 Sep 2008 19:05:48 -0700 (PDT) Message-ID: <743902.97280.qm_at_web58401.mail.re3.yahoo.com> Hi List! My apologies if this has been posted previously. http://www.todaysbigthing.com/2008/09/09 It's a video showing a simulation of a 500km asteroid striking Earth. Enjoy! MikeG ......................................................... Michael Gilmer (Louisiana, USA) Member of the Meteoritical Society. Member of the Bayou Region Stargazers Network. Websites - http://www.galactic-stone.com and http://www.glassthrower.com MySpace - http://www.myspace.com/fine_meteorites_4_sale .......................................................... --- On Fri, 9/19/08, meteorite-list-request at meteoritecentral.com <meteorite-list-request at meteoritecentral.com> wrote: > From: meteorite-list-request at meteoritecentral.com <meteorite-list-request at meteoritecentral.com> > Subject: Meteorite-list Digest, Vol 59, Issue 25 > To: meteorite-list at meteoritecentral.com > Date: Friday, September 19, 2008, 8:58 PM > Send Meteorite-list mailing list submissions to > meteorite-list at meteoritecentral.com > > To subscribe or unsubscribe via the World Wide Web, visit > http://six.pairlist.net/mailman/listinfo/meteorite-list > or, via email, send a message with subject or body > 'help' to > meteorite-list-request at meteoritecentral.com > > You can reach the person managing the list at > meteorite-list-owner at meteoritecentral.com > > When replying, please edit your Subject line so it is more > specific > than "Re: Contents of Meteorite-list digest..." > > > Today's Topics: > > 1. CHASSIGNITE - No Reserve / IM CHAIT AUCTION > THIS SUNDAY > (Darryl Pitt) > 2. BAD LINK? / CHASSIGNITE - No Reserve / IM > CHAIT AUCTION THIS > SUNDAY (Darryl Pitt) > 3. IM CHAIT AUCTION THIS SUNDAY > (bernd.pauli at paulinet.de) > 4. Ziz Meteorite Photographs - Link (Jason Utas) > 5. Re: Ziz Meteorite Photographs - Link > (bernd.pauli at paulinet.de) > 6. Mars Exploration Rovers Update - September 4-11, 2008 > (Ron Baalke) > 7. Mars Odyssey THEMIS Images: September 15-19, 2008 > (Ron Baalke) > 8. AD - Looking to TRADE ZAG (David & Kitt Deyarmin) > 9. Scientists Debate Planet Definition and Agree > to Disagree > (Ron Baalke) > 10. Scientists hope to land spacecraft on asteroid > (Darren Garrison) > 11. AD : FOR SALE - MAPS Journal April 2008 (Michael > Gilmer) > 12. Re: the denver show (PHOTOS!) (Bob Loeffler) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Fri, 19 Sep 2008 13:45:01 -0400 > From: Darryl Pitt <darryl at dof3.com> > Subject: [meteorite-list] CHASSIGNITE - No Reserve / IM > CHAIT AUCTION > THIS SUNDAY > To: meteorite-list List > <meteorite-list at meteoritecentral.com> > Message-ID: > <DF39E0C1-4ACD-4DD0-83E3-A41A696B6A43 at dof3.com> > Content-Type: text/plain; charset=US-ASCII; delsp=yes; > format=flowed > > > > With gratitude to Adam Hupe's for his plug of the IM > CHAIT auction > taking place this Sunday. > > Meteorites commence with lot 216 > > > LOT 229 / CHASSIGNITE - NWA 2737 / small complete > slice...and cheap!! > LOT 226 / CK-ANOM - Ningqiang / fragment with crust of the > most > exotic Chinese meteorite > LOT 217 / LUNAR - NWA 482 / with crust and a low reserve. > LOT 218 / LUNAR - SHIS,R 160 / the recently named lunar > found by Mike > Farmer and Robert Ward earlier this year. Complete > Slice--and nearly > all the material is gone. > > > http://www.chait.com/asp/searchresults.asp?pg=6&ps=50 > > Also featuring Fukang, Campo, Gibeon, Imilac, Glorieta > (pallasite) > and more. > > > Enjoy!! > > > > > > ------------------------------ > > Message: 2 > Date: Fri, 19 Sep 2008 16:51:53 -0400 > From: Darryl Pitt <darryl at dof3.com> > Subject: [meteorite-list] BAD LINK? / CHASSIGNITE - No > Reserve / IM > CHAIT AUCTION THIS SUNDAY > To: meteorite-list List > <meteorite-list at meteoritecentral.com> > Message-ID: > <1C07DCFE-4D9B-4946-9593-BEBA5BFA388D at dof3.com> > Content-Type: text/plain; charset=US-ASCII; delsp=yes; > format=flowed > > > > Hi there! > > I've received a couple of emails which have indicated > that the link > provided below is not working. I regret the inconvenience. > > Should you be experiencing difficulty, please go to: > > http://www.chait.com > > ---Then click on the Natural History catalog > > ---Then click the link for LOTS 200-250 at the top of the > page > > > All best, > > Darryl > > > =========================== > > > Begin forwarded message: > > > From: Darryl Pitt <darryl at dof3.com> > > Date: September 19, 2008 1:45:01 PM EDT > > To: meteorite-list List > <meteorite-list at meteoritecentral.com> > > Subject: CHASSIGNITE - No Reserve / IM CHAIT AUCTION > THIS SUNDAY > > > > > > > > With gratitude to Adam Hupe's for his plug of the > IM CHAIT auction > > taking place this Sunday. > > > > Meteorites commence with lot 216 > > > > > > LOT 229 / CHASSIGNITE - NWA 2737 / small complete > slice...and cheap!! > > LOT 226 / CK-ANOM - Ningqiang / fragment with crust of > the most > > exotic Chinese meteorite > > LOT 217 / LUNAR - NWA 482 / with crust and a low > reserve. > > LOT 218 / LUNAR - SHIS,R 160 / the recently named > lunar found by > > Mike Farmer and Robert Ward earlier this year. > Complete Slice--and > > nearly all the material is gone. > > > > > > > http://www.chait.com/asp/searchresults.asp?pg=6&ps=50 > > > > Also featuring Fukang, Campo, Gibeon, Imilac, Glorieta > (pallasite) > > and more. > > > > > > Enjoy!! > > > > > > > > > > ------------------------------ > > Message: 3 > Date: 19 Sep 2008 21:02:24 UT > From: bernd.pauli at paulinet.de > Subject: [meteorite-list] IM CHAIT AUCTION THIS SUNDAY > To: meteorite-list at meteoritecentral.com > Message-ID: <DIIE.0000009C000033DD at paulinet.de> > Content-Type: text/plain; charset="iso-8859-1" > > > Then click the link for LOTS 200-250 at the top of > the page > > .. then click the link for lots 201-250 > > Sorry! I couldn't resist. A teacher's blood still > running in my veins :-)) > > But: I know that there are several list members who also > love and collect > crystals and minerals. Have a look at auction item # 16. > Wow! Beautiful > quartz crystals and embedded within a single cubic pyrite. > Breathtakingly > aesthetic!!! > > Bernd > > To: darryl at dof3.com > meteorite-list at meteoritecentral.com > > > > ------------------------------ > > Message: 4 > Date: Fri, 19 Sep 2008 14:13:51 -0700 > From: "Jason Utas" <meteoritekid at gmail.com> > Subject: [meteorite-list] Ziz Meteorite Photographs - Link > To: Meteorite-list > <meteorite-list at meteoritecentral.com> > Message-ID: > <93aaac890809191413v7016a449wd18b9460065c3b83 at mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1 > > Hello All, > > In light of the new iron being found, and it's supposed > similarity to > Ziz, I've taken the liberty of shooting some of the Ziz > irons. > All of the photos are available in large sizes, with the > best > resolution I could give. > > They're available at the following link: > > http://www.flickr.com/photos/30622578 at N08/sets/72157607335937821/ > > I'm not sure if one has to become a member of the > website to view the > photos in full-resolution or not, but if it's offered, > clicking on the > "all sizes" tab located at the upper left of the > picture should allow > you a full-screen view of any photo I've posted. > > In any case, I'm of the opinion that Ziz is distinct > from the new > finds. I don't have a slice on-hand to compare, but > from what I can > remember, there wasn't a single silicate inclusion > present in any of > the slices from the 20+kg mass that was sectioned. > Although one could say that, as with Campo, there are > silicate-rich > and silicate-poor areas within the iron, I would simply > point out the > fact that even the slices of Campo rare in silicates > typically show an > inclusion or two - and none of the individuals pictured has > a single > silicate inclusion visible on its surface. So...well, have > a look. > > Regards, > Jason > > > ------------------------------ > > Message: 5 > Date: 19 Sep 2008 21:23:13 UT > From: bernd.pauli at paulinet.de > Subject: Re: [meteorite-list] Ziz Meteorite Photographs - > Link > To: meteorite-list at meteoritecentral.com > Message-ID: <DIIE.0000009A000033E1 at paulinet.de> > Content-Type: text/plain; charset="iso-8859-1" > > Hello "Operation Clean Sweep" and List, > > "In any case - enjoy" > > Thank you for sharing them, ...that's what I did! > > "I know they're not professional" > > That's definitely an understatement! Geoff, your > comment(s), please! > Some of these pictures are extraordinary! I especially like > this overview: > > 14 + 23 + 21 + 4 +2 kg + 37 + 47 + 173g Ziz > > Best, > > Bernd > > > > To: meteoritekid at gmail.com > meteorite-list at meteoritecentral.com > > > > ------------------------------ > > Message: 6 > Date: Fri, 19 Sep 2008 15:03:22 -0700 (PDT) > From: Ron Baalke <baalke at zagami.jpl.nasa.gov> > Subject: [meteorite-list] Mars Exploration Rovers Update - > September > 4-11, 2008 > To: meteorite-list at meteoritecentral.com (Meteorite Mailing > List) > Message-ID: > <200809192203.PAA12051 at zagami.jpl.nasa.gov> > Content-Type: text/plain; charset=us-ascii > > > http://marsrovers.jpl.nasa.gov/mission/status.html > > SPIRIT UPDATE: Light Duty for Now - sol 1663-1668, > September 05-11, 2008: > > Spirit continues to conserve solar power while performing > light science > activities during the Martian winter. During the past week, > Spirit > studied the atmosphere and acquired two frames of the > full-color image > mosaic known as the "Bonestell panorama." > > Spirit is healthy and all subsystems are performing as > expected as of > the relay of information from NASA's Odyssey orbiter on > sol 1666 (Sept. > 9, 2008). Solar-array energy and tau -- a measure of > atmospheric opacity > caused by suspended dust -- are holding steady at 245 > watt-hours (100 > watt-hours is the amount of energy needed to light a > 100-watt bulb for > one hour) and 0.20, respectively. > > Sol-by-sol summary > > In addition to taking daily measurements of dust-related > changes in > atmospheric opacity (tau), Spirit completed the following > activities: > > Sol 1663 (Sept. 6, 2008): Spirit recharged the batteries. > > Sol 1664: Spirit acquired column 18 of the Bonestell > panorama, using all > 13 color filters of the panoramic camera. > > Sol 1665: Spirit recharged the batteries. > > Sol 1666: Spirit recharged the batteries. > > Sol 1667: Spirit received new instructions from Earth via > the rover's > high-gain antenna and relayed data to the UHF antenna on > NASA's Odyssey > orbiter to be transmitted to Earth. > > Sol 1668 (Sept. 11, 2008): Spirit monitored dust > accumulation on the > panoramic-camera mast assembly and acquired column 19 of > the Bonestell > panorama. > > Odometry: > > As of sol 1666 (Sept. 9, 2008), Spirit's total odometry > was 7,528.0 > meters (4.7 miles). > > ------------------------------------------------------------------------ > > OPPORTUNITY UPDATE: Playing in the Sand - sol 1641-1647, > September 04-11, 2008: > > During the past week, Opportunity performed several tests > of the robotic > arm to learn how to use it with a disabled shoulder joint. > Having > successfully completed those tests, Opportunity is moving > on to > investigate some bright patches of dust. Scientists hope to > ascertain if > the patches contain material not thoroughly analyzed in the > past. > > On sol (Martian day) 1641 (Sept. 4, 2008), Opportunity > homed in on an > area of sand that appeared to contain a high concentration > of dust. For > the next several days, sols 1642-1647 (Sept. 5-11, 2008), > the rover > tested the robotic arm's ability to place scientific > instruments on > specific targets in the sand. These instruments included > the Moessbauer > spectrometer, microscopic imager, and alpha-particle X-ray > spectrometer. > Tests revealed that the robotic arm placed the instruments > in position > with very little error in spite of the disabled shoulder > joint. Because > the dust was not pure enough to yield the desired > scientific results, > engineers decided on sol 1648 (Sept. 12, 2008) to drive the > rover north > to a more promising area of apparent dust patches. > > On sol 1644 (Sept. 7, 2009), Opportunity relayed data at > UHF frequencies > to NASA's Mars Reconnaisance Orbiter (MRO). Typically, > the rover sends > data to NASA's Odyssey orbiter for transmission to > Earth. Once a month, > Opportunity is relaying data to the Mars Reconnaissance > Orbiter in > preparation for using it more in the future. > > Opportunity is healthy, with all subsystems performing as > expected as of > the most recent transfer of information from NASA's > Odyssey orbiter on > sol 1647 (Sept. 11, 2008). Power rose to 652 watt-hours > (enough energy > to light a 100-watt bulb for a tad longer than 6.5 hours). > > Sol-by-sol summary: > > Each Martian day, or sol, Opportunity measured dust-related > changes in > atmospheric clarity with the panoramic camera. In addition, > Opportunity > completed the following activities: > > Sol 1641 (Sept. 4, 2008): Before driving, Opportunity > acquired a 3-by-1 > panel of panoramic-camera images looking north. The rover > then nudged > toward a bright patch and, after stopping, acquired images > of the ground > near its wheels and the area directly ahead with the > hazard-avoidance > and navigation cameras, respectively. The rover relayed > data to Odyssey. > > Sol 1642: In the morning, Opportunity took thumbnail images > and spot > images of the sky for calibration purposes with the > panoramic camera. > Next, the rover tested movement and placement of the > Moessbauer > spectrometer, taking images near the ground with the > hazard-avoidance > cameras and images from above with the panoramic camera. > Opportunity > then used the Moessbauer spectrometer to acquire > compositional data from > a sand dune on the rim of "Victoria Crater." > After relaying data to > Odyssey, Opportunity went into a mini-deep sleep. > > Sol 1643: Opportunity acquired six, time-lapse movie frames > in search of > morning clouds with the navigation camera. Opportunity > continued to > acquire data from the sand dune at the rim of Victoria > Crater with the > Moessbauer spectrometer. Opportunity took full-color > images, using all 13 > color filters of the panoramic camera, of the rover's > tracks. After > sending data to Odyssey, Opportunity went into a mini-deep > sleep. > > Sol 1644: Opportunity acquired six, time-lapse movie frames > in search of > clouds. The rover continued to collect data from the dune > on the rim of > Victoria Crater using the Moessbauer spectrometer. Before > communicating > with Odyssey, Opportunity relayed data to the Mars > Reconnaissance > Orbiter for transmission to Earth. After sending data to > Odyssey, the > rover went into a mini-deep sleep. > > Sol 1645: In the morning, Opportunity acquired six, > time-lapse movie > frames in search of clouds with the navigation camera. > Opportunity > acquired a 1-by-3-by-15 stack of microscopic images of > ripple soil. The > rover restarted the Moessbauer spectrometer and began > collecting data > from the soil in the ripples. After transmitting data to > Odysssey, > Opportunity acquired a 3-by-1 panel of images of a target > dubbed > "Schuchert." > > Sol 1646: Opportunity monitored dust accumulation on the > panoramic-camera mast assembly and restarted the Moessbauer > spectrometer > for collecting data on the ripple soil. The rover used the > miniature > thermal emission spectrometer to complete a mini-survey of > the sky and > ground. Before sending data to Odyssey, Opportunity used > the > spectrometer to characterize the external calibration > target. > > Sol 1647 (Sept. 11, 2008): Opportunity acquired more > time-lapse, movie > frames to document potential clouds passing overhead. The > rover took a > 3-by-1 panel of images of Schuchert with the panoramic > camera and a > time-lapse movie in search of clouds. Opportunity placed > the > alpha-particle X-ray spectrometer on the ripple soil and, > after sending > data to Odyssey, acquired compositional data. Plans for the > following > morning called for the rover to study a cobble field, > acquiring a 4-by-1 > panel of images with the panoramic camera. > > Odometry: > > As of sol 1647 (Sept. 11, 2008), Opportunity's total > odometry was > 11,782.10 meters (7.32 miles). > > > > ------------------------------ > > Message: 7 > Date: Fri, 19 Sep 2008 15:05:53 -0700 (PDT) > From: Ron Baalke <baalke at zagami.jpl.nasa.gov> > Subject: [meteorite-list] Mars Odyssey THEMIS Images: > September 15-19, > 2008 > To: meteorite-list at meteoritecentral.com (Meteorite Mailing > List) > Message-ID: > <200809192205.PAA13017 at zagami.jpl.nasa.gov> > Content-Type: text/plain; charset=us-ascii > > > MARS ODYSSEY THEMIS IMAGES > September 15-19, 2008 > > o Lava Channel (Released 15 September 2008) > http://themis.asu.edu/zoom-20080915a > > o Buvinda Vallis (Released 16 September 2008) > http://themis.asu.edu/zoom-20080916a > > o Tempe Terra (Released 17 September 2008) > http://themis.asu.edu/zoom-20080917a > > o Iani Chaos (Released 18 September 2008) > http://themis.asu.edu/zoom-20080918a > > o Ascraeus Mons (Released 19 September 2008) > http://themis.asu.edu/zoom-20080919a > > > All of the THEMIS images are archived here: > > http://themis.asu.edu/latest.html > > NASA's Jet Propulsion Laboratory manages the 2001 Mars > Odyssey mission > for NASA's Office of Space Science, Washington, D.C. > The Thermal Emission > Imaging System (THEMIS) was developed by Arizona State > University, > Tempe, in co.oration with Raytheon Santa Barbara Remote > Sensing. > The THEMIS investigation is led by Dr. Philip Christensen > at Arizona State > University. Lockheed Martin Astronautics, Denver, is the > prime contractor > for the Odyssey project, and developed and built the > orbiter. Mission > operations are conducted jointly from Lockheed Martin and > from JPL, a > division of the California Institute of Technology in > Pasadena. > > > > > > ------------------------------ > > Message: 8 > Date: Fri, 19 Sep 2008 18:13:39 -0400 > From: "David & Kitt Deyarmin" > <bobadebt at ec.rr.com> > Subject: [meteorite-list] AD - Looking to TRADE ZAG > To: <meteorite-list at meteoritecentral.com> > Message-ID: <0AE89A852ABA466F9EF675093A449669 at David> > Content-Type: text/plain; format=flowed; > charset="iso-8859-1"; > reply-type=original > > I have about 700 grams of Zag slices available for sale at > $3 per gram. > These are some super nice slices and you can see them by > clicking this: > > http://home.ec.rr.com/bobadebt/Rocks/FS%20Zag.htm > > > > > > I am also open to trades / partial trades with cash / etc > for the following > material - > > GHUBARA (L5) > > SIKHOTE - ALIN > > A SUITABLE H4 OF H4 > > A MESOSIDERITE > > > > My only stipulation is that the material be large enough to > produce a 50mm > sphere. To meet that requirement it has to measure at > least 52mm in what > would be the center of all 3 axis that the sphere rough > would be cut from. > > My only motivation for selling material is to acquire new > material for > additional spheres to add to my collection. The material I > sell is created > from specimens I buy to process into a sphere. > > I'm sure I can sell this material over a protracted > time period but it's > possible that one of you may have something I'm looking > for just collecting > dust on a shelf somewhere so this could be beneficial to > everyone involved. > > > > If you have something that you think I might be interested > in contact me off > list at bobadebt at ec.rr.com > > Thanks > > > > ------------------------------ > > Message: 9 > Date: Fri, 19 Sep 2008 15:28:51 -0700 (PDT) > From: Ron Baalke <baalke at zagami.jpl.nasa.gov> > Subject: [meteorite-list] Scientists Debate Planet > Definition and > Agree to Disagree > To: meteorite-list at meteoritecentral.com (Meteorite Mailing > List) > Message-ID: > <200809192228.PAA16541 at zagami.jpl.nasa.gov> > Content-Type: text/plain; charset=us-ascii > > > > http://www.psi.edu/press/archive/20080919planetdebate/ > > Scientists Debate Planet Definition and Agree to Disagree > Planetary Science Institute Press Release > > September 19, 2008 - Two years ago the International > Astronomical Union > (IAU) elected to define the term planet, restricting it to > the eight > largest bodies orbiting the Sun, and deleting Pluto from > the list. The > demotion of Pluto sparked considerable public controversy. > Numerous > planetary scientists and astronomers protested the > IAU's definition as > not useful, while numerous other planetary scientists and > astronomers > supported the outcome. > > Recognizing the need for further scientific debate on > planet definition, > more than 100 scientists and educators representing a wide > range of > viewpoints on the issue converged for three days on the > Applied Physics > Laboratory of Johns Hopkins University (APL) for "The > Great Planet > Debate: Science as Process" conference > <http://gpd.jhuapl.edu/> last > month. The conference was sponsored by NASA, APL, the > Planetary Science > Institute, The Planetary Society, and the American > Astronautical Society. > > Different positions were advocated, ranging from reworking > the IAU > definition (but yielding the same outcome of eight > planets), replacing > it with a geophysical-based definition (that would increase > the number > of planets well beyond eight), and rescinding the > definition for planet > altogether and focusing on defining subcategories for > serving different > purposes. No consensus was reached. > > A sample of the opinions expressed by conference > participants follows: > > "I was impressed with two things that came out of The > Great Planet > Debate meeting: first, that no one liked the IAU's > definition of > planethood, and second, that there are strongly divergent > scientific > opinions about what a planet is, with those who study > orbits and those > who study planets themselves seeing the matter very > differently." said > planetary scientist Alan Stern, currently a visiting > scholar at the > Lunar and Planetary Institute of Houston, Texas. "My > view is that the > dynamically based definitions are deeply flawed because > they do not take > into account any physical properties of the body in > question, and give > ridiculous results, for example classifying identical large > objects in > different orbits differently - so that even Earths are not > always > planets, which is crazy," Stern concluded. > > "Gravity forces large bodies to be round, whereas > small bodies can be > quite oddly shaped. But the proposed 'geophysical' > definition of > planethood based upon roundness uses a poor criterion > because there is > no good dividing line. Indeed, there are likely to be more > intermediate > solar system objects that are in the fuzzy > 'roundish' area than there > are objects that are clearly round. In contrast, the eight > planets > recognized by the IAU are significantly different from the > numerous > small objects that are classified as 'minor > planets' (asteroids) in > terms of both physical properties and their effects on > bodies orbiting > nearby," said Jack Lissauer, planetary scientist at > NASA's Ames Research > Center in Mountain View, California. > > "We all have a conceptual image of a planet. > Therefore, we need a term > that encompasses all objects that orbit the Sun or other > stars," said > Larry Lebofsky, Senior Education Specialist at the > Planetary Science > Institute in Tucson, Arizona. "The debate is a great > teaching moment. > Whether dwarf planets are grouped together with the > classical planets is > not as important as the process by which scientists arrived > at their > conclusions. Scientists look at the same information in > different ways; > there may be more than one 'answer'. Facts change. > What we know now may > not be what we know in two or three years. Learning to > think critically > and understanding how scientists organize facts to develop > theories are > lessons that will serve students for a lifetime." > > "The word 'planet' has a deep cultural context > that cannot be decided by > vote of a subset of astronomers meeting in a room > somewhere, especially > when that debate is rushed and the vote close", said > William McKinnon, a > Professor of Earth and Planetary Sciences at Washington > University in > St. Louis, and an IAU member. "The IAU should reopen > the issue to > electronic debate by the entire astronomical community. I > am sure the > outcome in that case, whatever it turns out to be, or even > if it is > concluded that no universal definition is necessary, would > be more > satisfactory to all parties," he said. > > "I believe the IAU definition correctly recognized the > utility of a > dynamical criterion, but that it needs clarification, not > abandonment. > In particular, 'clearing' the neighborhood should > be replaced by the > concept of 'dynamical dominance'," said Steven > Soter of the American > Museum of Natural History in New York. > > Jay Pasachoff, from Williams College, who is spending this > year at > Caltech studying Pluto's atmosphere, says, "I have > long tried, in my > textbooks, to reflect consensus rather than trying to > legislate new > terminology. I think that the IAU should have limited their > decision to > the administrative assignment of naming responsibility and > not tried to > make decisions for the general public. If third-grade > students > eventually decide that Eris, Makemake, Haumea, and their > successors are > too many to learn about, then a new consensus may emerge. > In the > meantime, let's let scientific discovery continue to > take its course and > let us hope to excite new generations of students with the > new > information that emerges." > > "I think the IAU made a mistake getting into the > business of defining a > widely used word, 'planet', and sowing confusion > thereby. > Scientifically, the useful discussion would be about > categories of > planets (e.g., gaseous planets, rocky planets, dwarf > planets, icy > planets, free-floating planets, etc., and an individual > celestial body > may fall into more than one category). This approach would > address the > main practical problem of nomenclature without confusing > the public > about 'planet' itself," said Renu Malhotra, a > Professor in the > Department of Planetary Sciences of the University of > Arizona. > > Neil deGrasse Tyson, astrophysicist with the American > Museum of Natural > History and panelist for the Great Planet Debate commented, > "The word > 'planet' has surely outlived its usefulness. The > time has come for us to > create a fresh and sensible classification scheme from the > ground up -- > one that applies to all objects of our own solar system, > yet is flexible > enough to embrace newly discovered objects elsewhere in the > galaxy. > Other fields, such as biology, and even subfields of > astrophysics that > study stars and galaxies, have strong needs to classify > objects and have > solved this problem long ago. It's time for the > community of planetary > scientists to do the same. We should not 'agree to > disagree, we should > 'agree to converge'." > > "It was a mistake for the IAU to dictate a definition > when there is no > consensus among planetary scientists. It is also > counter-productive to > focus only on the planets in our solar system, ignoring > some 300 > exoplanets," said David Morrison of NASA Ames Research > Center. "The IAU > definition of planet should be withdrawn or ignored." > > "Historically, 'planets' are just objects that > orbit the Sun. Even > asteroids are called 'minor planets' By the IAU. > The controversy caused > by the IAU officially declaring the term to be restricted > to eight > objects in our solar system was unnecessary, but a natural > consequence > of one group of people trying to impose their views on > everyone else," > said Mark Sykes, Director of the Planetary Science > Institute, in Tucson, > Arizona. "Ultimately, over the years, the process of > science is not > guided by imprimatur and ensures that the most generally > useful > perspective will prevail." > > The debate continues. > > ------------------------------------------------------------------------ > > The Planetary Science Institute is a private, nonprofit > corporation > founded in 1972 and dedicated to solar system exploration. > It is > headquartered in Tucson, Arizona. > > PSI scientists are involved in numerous NASA and > international missions, > the study of Mars and other planets, the Moon, asteroids, > comets, > interplanetary dust, impact physics, the origin of the > solar system, > extra-solar planet formation, dynamics, the rise of life, > and other > areas of research. They conduct fieldwork in North America, > Australia > and Africa. They also are actively involved in science > education and > public outreach through school programs, children's > books, popular > science books and art. > > The Institute's researchers are based in 15 states, the > United Kingdom, > Russia, Switzerland and Australia. > > > > ------------------------------ > > Message: 10 > Date: Fri, 19 Sep 2008 19:40:37 -0400 > From: Darren Garrison <cynapse at charter.net> > Subject: [meteorite-list] Scientists hope to land > spacecraft on > asteroid > To: meteorite-list at meteoritecentral.com (Meteorite Mailing > List) > Message-ID: > <tjd8d4hbcecq84aj75fjppd7dqms853sje at 4ax.com> > Content-Type: text/plain; charset=ISO-8859-1 > > http://news.scotsman.com/uk/Scientists-hope-to-land-spacecraft.4511699.jp > > Scientists hope to land spacecraft on asteroid > Published Date: 20 September 2008 > By Jenny Haworth > EUROPEAN scientists are hoping to land a spacecraft on an > asteroid to help > research into the origins of Earth. Known as Marco Polo, > the mission, run by > scientists and engineers could take place in the next ten > years. > The aim would be to bring back material from an asteroid to > learn more about how > our solar system developed. > > A small asteroid ? less than a mile across ? would be > selected near Earth. A > spacecraft would land and drill for dust and rubble. > > Sattelite manufacturers Astrium in the UK and OHB in > Germany are undertaking a > study to assess the type of spacecraft that would be needed > to carry out the > project. > > Dr Ralph Cordey from Astrium said: "We've got to > look at all elements of the > mission ? how we would design the mission, how to design > the trajectory to one > of a number of possible asteroids, how to optimise that so > we use the smallest > spacecraft, the least fuel and the smallest rocket." > > Professor Andrew Collier Cameron, an astronomer from the > University of St > Andrews, said the venture could help solve the mystery of > the origins of planets > like Earth. > > "Getting samples is very, very important," said > Prof Collier Cameron. "It gives > us a sample of primordial material left over from the time > when the solar system > was formed." > > Asteroids are lumps of debris left over from the formation > of the solar system > about 4.6 billion years ago. > > They can provide pristine material to help scientists find > out how planets could > evolve from dust particles that built up to form > gravel-like rocks. > > A final decision on whether to approve the mission will be > made by the European > Space Agency (ESA) in a few years. > > If approved, the mission would launch in about 2017. > > The mission could provide considerable challenges. If the > spacecraft does not > approach the asteroid correctly, it could be damaged or > could bounce back off > into space. > > It is expected that up 300g of dust and pebbles could be > stored in a sealed > capsule in the probe. It would release the capsule close to > Earth for a > re-entry. > > After it landed, the capsule would be opened in a clean > facility to make sure > there was no contamination of the samples. > > ESA has an exploration roadmap for the missions it wishes > to conduct in the > coming years. Marco Polo is being considered under its > Cosmic Visions programme, > and is one of a number of competing ideas in a class of > missions that could cost > in the region of 300 million (?238 million). > > Such a mission could help develop the technology needed for > the more challenging > task of landing on and leaving a planet that has a much > bigger gravitational > pull, such as Mars. > > BACKGROUND > > THE Japanese recently attempted to grab samples off the > surface of Asteroid > Itokawa. > > However, it is still not clear whether the spacecraft > managed to capture any > material. The probe is due to return to Earth in 2010. > > The Americans gathered information about Asteroid Eros with > their NEAR Shoemaker > probe, which orbited close to the asteroid to collect data > in 2000. > > They have also sent the Dawn spacecraft to rendezvous with > Asteroid Vesta in > 2011 before going on to visit Asteroid Ceres in 2015. > > Europe's Rosetta probe, which is en route to a comet, > took close-up pictures of > Asteroid Steins during a flyby earlier this month. > > Ultimately, it is possible that astronauts could visit an > asteroid. The US space > agency is currently studying how this might be done. > > > Also: > > http://blogs.discovermagazine.com/80beats/2008/09/19/europeans-lay-out-plans-to-bring-asteroid-chunks-back-to-earth/ > > (in honor of the date, passed through here > http://www.syddware.com/cgi-bin/pirate.pl) > > Europeans Lay Ou' Plans t' Brin' Asteroid > Chunks Aft t' Earth > > Th' European Space Agency (ESA) be considerin' a > space voyage called Marco Polo, > in which a spacecraft would land on a wee asteroid, drill > into its surface t' > collect samples o' rock an' dust, an' then fly > aft t' Earth 'ere 't would drop > its sample capsule down t' th' surface. Two > satellite manufacturin' companies be > currently conductin' a feasibility study; if ESA signs > off on th' proposal, > Marco Polo could sail off into space in 2017. > > Asteroids be chunks o' debris port o'er from > th' chaotic mass that spun around > th' young Sun durin' th' formation o' > th' Solar System about 4.6 billion voyages > ago. Th' rest o' th' material coalesced into > planets [Th' Daily Mail]. > Researchers say that studyin' th' composition > o' an asteroid could give them > insight into how th' solar system formed. Th' > roughly $430 cargo holds o' voyage > would also serve as a warm-up fer a hypothetical round-trip > journey t' Mars, as > 't would enable th' development o' technology > needed fer gettin' up an' down > from a large planetary body wi' a much bigger > gravitational pull [Telegraph]. > > Marco Polo wouldna be th' first spacecraft t' > alight on an asteroid, or t' try > t' brin' aft a souvenir from one. In 2001, NASA > brought th' NEAR Shoemaker > spacecraft down fer a landin' on th' nearby > asteroid Eros, from 'ere 't > continued t' send data fer about two tides. Landin' > can be tricky, tho: In 2005, > Japan?s Hayabusa spacecraft attempted t' land briefly > on th' Itokawa asteroid > an' collect a rock sample, but malfunctions an' > communication blackouts > bedeviled th' voyage. Still, Japanese engineers > b'lieve Hayabusa collected some > dust that swirled up from th' asteroid?s surface, > an' be eagerly awaitin' th' > craft?s return t' Earth in 2010. > > While robotic rovers an' probes be havin' conducted > many noteworthy experiments > on extraterrestrial bodies, so-called sample return > missions be o' increasin' > interest t' scientists. Although in-situ measurements > provide remarkable > insights, so much more would be learnt if materials be > brought aft t' Earth > laboratories, 'ere th' full panoply o' modern > analytical technologies can be > deployed [BBC News]. ESA an' NASA be havin' also > discussed cooperatin' on a > sample return voyage t' Mars, although th' $4.5 > t' $8 billion price tag fer such > a voyage be dauntin'. > > > ------------------------------ > > Message: 11 > Date: Fri, 19 Sep 2008 17:38:06 -0700 (PDT) > From: Michael Gilmer <michael_w_gilmer at yahoo.com> > Subject: [meteorite-list] AD : FOR SALE - MAPS Journal > April 2008 > To: meteorite-list at meteoritecentral.com > Message-ID: > <903418.62803.qm at web58404.mail.re3.yahoo.com> > Content-Type: text/plain; charset=us-ascii > > Hi folks! > > I am offering for sale the following item (trying to > recover financially from the evacuation expenses of > hurricane Gustav) : > > 1) MAPS Journal - Meteoritics and Planetary Science, the > official publication of the Meteoritical Society. > Volume 43, Number 4, April 2008. - Mint condition, $25.00 > shipped to anywhere in the CONUS. > > Contents : > > a) Radial Transport in the Solar Nebula : Implications for > moderately volatile element depletions in > chondritic meteorites. > b) Evolution of the Winonaite Parent Body : Clues from > silicate material trace elements distributions > c) 182Hf - 182W Chronometry and the Early Evolution History > in the acapulcoite parent body. > d) Noble Gases in Grant and Carbo and the influence of S- > and P-rich mineral inclusions in the > 41K-40K dating system. > e) Structural Evolution of the 40km wide Araguainha impact > structure, Central Brazil. > f) Kinetic Stability of a melted iron globule during > chondrule formation. Non-rotating model. > g) Frontier Mountain Meteorite Specimens of the > acapulcoite-lodranite clan : Petrography, pairing, > and parent rock lithology of an unusual intrusive rock. > h) PDF Orientations in shocked quartz grains around the > Chicxulub crater. > i) Araki (L5) chondrite : the first meteorite find in Thar > Desert of India. > j) Experimental Impacts into chondritic targets, Part I : > Disruption of an L6 chondrite by multiple impacts. > k) The 410,000 year terrestrial age of eucrite Rio Cuarto > 001. > l) Constraints on the depth and variability of the lunar > regolith. > > ---> I also have 100-gram lots of small UNWA stones > available for $25 shipped. (CONUS only) > > ---> Zagami "Bessey Specks" - $15 (includes > gem jar and label) > > (*** PAYPAL ONLY ***) > > Canadian and Overseas sales will incur extra shipping > charges - email me for a quote. > > Thanks for looking and clear skies! > > MikeG > > ......................................................... > Michael Gilmer (Louisiana, USA) > Member of the Meteoritical Society. > Member of the Bayou Region Stargazers Network. > Websites - http://www.galactic-stone.com and > http://www.glassthrower.com > MySpace - http://www.myspace.com/fine_meteorites_4_sale > .......................................................... > > > > > > > ------------------------------ > > Message: 12 > Date: Fri, 19 Sep 2008 19:58:18 -0600 > From: "Bob Loeffler" <bobl at peaktopeak.com> > Subject: Re: [meteorite-list] the denver show (PHOTOS!) > To: <meteorite-list at meteoritecentral.com> > Message-ID: > <20080920015838.CE34C10543 at mailwash5.pair.com> > Content-Type: text/plain; charset="us-ascii" > > Hi Doug, > > Yes, I think that was Matt Morgan's big Johnstown in > one of the showcases. > > Speaking of which... We now have photos posted on the > COMETS website! > Photos were taken by Ron Pearson and are of the Friday > night auction, > Saturday night dinner and the COMETS two showcases at the > main Denver Show. > You can see the photos at: > > http://www.peaktopeak.com/comets/gallery/2008show/2008show.htm > > Click on the thumbnail images to see larger photos. > > Regards, > > Bob Loeffler > COMETS > Colorado Meteorite Society > > > -----Original Message----- > From: meteorite-list-bounces at meteoritecentral.com > [mailto:meteorite-list-bounces at meteoritecentral.com] On > Behalf Of > mexicodoug at aim.com > Sent: Sunday, September 14, 2008 10:36 PM > To: Meteorite-list at meteoritecentral.com > Subject: Re: [meteorite-list] the denver show > > Hi Steve and friends from Denver. > > Steve, your really got to come next year. The local Denver > meteorite > listmembers and Crado meteorite club hosts organized a > super Mexican > buffet dinner last night, and it was laid back and > enjoyable (hopefully > I can go go to a meteorite even one of these days that is > not Mexican > food since . A nice complement to Tucson. In the main > fossil center > there was a superb exhibit of, I'm betting of around > 50% of all > Colorado meteorites. Museum specimens just about every one > of them. I > think it fit in very well with the theme of the show casing > of Colorado > minerals and even a hands on gold panning display that was > a real > family event. Several dealers were here, and I enjoyed > chatting with a > very educational and professional set up that Fred Hall and > his > children had.. > > Otherwise, the deals weren't anything to write home > about as Mike > alrady mentioned. On second thought, there were deals if > you looked > hard enough. Hans was dealing with a couple of new items > and Blaine > had a bunch of new items, for example. The auction was > nice, I wanted > to bid on Claxton, but I couldn't find my card on time, > so someone got > a deal. > > I had the pleasure of meeting Art Ehlmann who kindly placed > a few TCU > specimens in the auction, and had some very interesting > stories to > relate regarding Nininger - Monnig correspondence and the > like from > years backs. Larr Sloan and Larry Johnson, too. Anne > Black and the > Jensens were both very enthusiastic as always and pleasant. > Sorry I > missede Matt Morgan. (I wonder if it was his piece of > Johnstown in the > Colorado meteorite exhibit Must have been a 100 gram half > stone or so > with the most beautiful, fresh matrix of the show for me. > > There are many people in Denver that are not hard core > meteorite folk > that sort of get pulled into it. There just isn't that > tense > deal-or-die attitude I sometimes see in Tucson. Overall a > great small, > short, and sweet show set in the foot of snow capped > mountains. Thanks > to all who made this possible. I just hope the dealers > broke even as > the traffic seemed light to me, but hey, it was my first > tiime visiting > this enjoyable show. > > Comet Shop had some great deals, otherwise Sikhote-Alins > just keep > drifting upwards in prices for all types and flight marked > pieces were > rare which uite frankly is scary. Or maybe the early birds > got the > worms; I came just for the weekend... > > Hope that helps... > > Best wuishes, > Doug > > > > > ------------------------------ > > _______________________________________________ > Meteorite-list mailing list > Meteorite-list at meteoritecentral.com > http://six.pairlist.net/mailman/listinfo/meteorite-list > > > End of Meteorite-list Digest, Vol 59, Issue 25 > ********************************************** Received on Fri 19 Sep 2008 10:05:48 PM PDT |
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