[meteorite-list] OT - Happy Crab Nebula Day!

From: mafer at imagineopals.com <mafer_at_meteoritecentral.com>
Date: Tue, 05 Jul 2011 04:32:40 +0100
Message-ID: <cf39bee9706effa3e6070c423004f43e_at_>

The Gregorian calendar represents a generalized conversion so that things
are easily kept in perspective between the sciences and the rest of the
world. And thus, the terms Current Era (CE) and Before Current Era (BCE)
have come into use and they do not represent Julian Calendar timelines.


You could also add the Egyptian, Mayan, and Hebrew calendars if you really
want to confuse the issue and there are those who seem to have obtained
post grad degrees with methods to reconcile the various calendars so that
all dates within each match up.


And since some predate the Julian Calendar, which hold the superior claim?
Which is the most easily used and more commonly used?


BTW the Crab Nebula is one of the most beautiful of formations and one that
many people have seen, even if they wouldn't recognize it.



On 4:15:42 am 07/05/11 MexicoDoug <mexicodoug at aim.com> wrote:
>
> It ought to be Julian since that was in effect ... or else all the
> references would have to say something about the re-adjustment of the
> date, but that's just an opinion! In astronomy, generally the 1582
> conversion is respected by astronomers if I recall - I.e., before
> that time events are on the Julian Calendar, and afterwards
> Gregorian, even if they nation of the observation was still on the
> Julian date; usually that doesn't matter and by convention the
> expression I time I believe changes in 1582. Jean Meeus's incredibly
> useful books, if I had them would have an excellent discussion of the
> subject, but I don't have my references with me. Some other list
> member could look it up as Meeus'd be the expert.
>
> Best wishes
> Doug
>
> -----Original Message-----
> From: Patrick Wiggins <paw at wirelessbeehive.com>
> To: MeteorList <meteorite-list at meteoritecentral.com>
> Sent: Mon, Jul 4, 2011 10:12 pm
> Subject: Re: [meteorite-list] OT - Happy Crab Nebula Day!
>
>
> I've often wondered and maybe someone here can answer.
>
> Since 1054 was long before the 1582 conversion from the Julian to
> Gregorian
> calendar, is the July 4 date that gets mentioned for the first
> sighting of
> supernova a Julian date or has it been converted to Gregorian?
>
> ???
>
> patrick
>
>
> On 04 Jul 2011, at 10:25, Gary Fujihara wrote:
>
> > Cosmic Fireworks: On July 4, 1054, Chinese astronomers observed a
> "guest star"
> in the constellation Taurus, the result of a star exploding or going
> Supernova.
> At mag -6, SN1054 (Supernova of 1054) became about 4 times brighter
> than Venus,
> was visible in daylight for 23 days, and lasted a period of two
> years. Today we
> can still see remnants of SN1054 as the Messier Object 1 (M1) Crab
> Nebula.
> >
> > http://bigkahuna-meteorites.com/_M1.jpg
> >
> > Oh, and for those terrestrially bound in the USA, Happy Fourth of
> July!
> >
> > Gary Fujihara
> > Big Kahuna Meteorites (IMCA#1693)
> > 105 Puhili Place, Hilo, Hawai'i 96720
> > http://bigkahuna-meteorites.com/
> > http://shop.ebay.com/fujmon/m.html
> > (808) 640-9161
> ______________________________________________
> Visit the Archives at
> http://www.meteoritecentral.com/mailing-list-archives.html
> Meteorite-list mailing list
> Meteorite-list at meteoritecentral.com
> http://six.pairlist.net/mailman/listinfo/meteorite-list
> ______________________________________________
> Visit the Archives at http://www.meteoritecentral.com/mailing-list-arc
> hives.html
> Meteorite-list mailing list
> Meteorite-list at meteoritecentral.com
> http://six.pairlist.net/mailman/listinfo/meteorite-list
>
Received on Mon 04 Jul 2011 11:32:40 PM PDT