Free Republic
Browse · Search
General/Chat
Topics · Post Article

Skip to comments.

Astronomy Picture of the Day -- M1: The Crab Nebula from Hubble
NASA ^ | December 25, 2011 | (see photo credit)

Posted on 12/25/2011 4:22:54 PM PST by SunkenCiv

Explanation: This is the mess that is left when a star explodes. The Crab Nebula, the result of a supernova seen in 1054 AD, is filled with mysterious filaments. The filaments are not only tremendously complex, but appear to have less mass than expelled in the original supernova and a higher speed than expected from a free explosion. The above image, taken by the Hubble Space Telescope, is presented in three colors chosen for scientific interest. The Crab Nebula spans about 10 light-years. In the nebula's very center lies a pulsar: a neutron star as massive as the Sun but with only the size of a small town. The Crab Pulsar rotates about 30 times each second.

December 25, 2011

(Excerpt) Read more at 129.164.179.22 ...


TOPICS: Astronomy; Astronomy Picture of the Day; Science
KEYWORDS: apod; astronomy; crabnebula; science
Navigation: use the links below to view more comments.
first previous 1-2021-4041-55 last
To: TheOldLady

Nicely played...


41 posted on 12/26/2011 12:41:31 AM PST by null and void (Day 1068 of America's ObamaVacation from reality [Heroes aren't made, Frank, they're cornered...])
[ Post Reply | Private Reply | To 39 | View Replies]

To: null and void

You’re a really good sport. Phew!


42 posted on 12/26/2011 5:57:31 AM PST by TheOldLady (FReepmail me to get ON or OFF the ZOT LIGHTNING ping list)
[ Post Reply | Private Reply | To 41 | View Replies]

To: TheOldLady
I was pretty sure you were up to no good by post #25.

OTOH, while usually when you have to explain a joke it isn't funny, sometimes the explanation is funnier than the original joke.

I was hoping to salvage that much...

43 posted on 12/26/2011 7:34:23 AM PST by null and void (Day 1069 of America's ObamaVacation from reality [Heroes aren't made, Frank, they're cornered...])
[ Post Reply | Private Reply | To 42 | View Replies]

To: calex59

I can see the bear too, took a while to see the open mouth, but it does look like a bear, more so if you tilt the image a little clockwise.

Still, I prefer the frog. It’s my frog. I found it. I can’t bear to see it otherwise...


44 posted on 12/26/2011 7:38:11 AM PST by null and void (Day 1069 of America's ObamaVacation from reality [Heroes aren't made, Frank, they're cornered...])
[ Post Reply | Private Reply | To 35 | View Replies]

To: null and void

Tough crowd.


45 posted on 12/26/2011 7:43:40 AM PST by Dysart
[ Post Reply | Private Reply | To 30 | View Replies]

To: null and void
AND you're a sweetie pie to boot.
46 posted on 12/26/2011 7:53:58 AM PST by TheOldLady (FReepmail me to get ON or OFF the ZOT LIGHTNING ping list)
[ Post Reply | Private Reply | To 43 | View Replies]

To: null and void; calex59
If y'all don't mind, I don't mean to growl at you or dance around the issue but would like to pile on here.

It's definitely a frog.
47 posted on 12/26/2011 7:57:50 AM PST by TheOldLady (FReepmail me to get ON or OFF the ZOT LIGHTNING ping list)
[ Post Reply | Private Reply | To 44 | View Replies]

To: TheOldLady; calex59
Maybe it's a French Bear?...
48 posted on 12/26/2011 8:08:54 AM PST by null and void (Day 1069 of America's ObamaVacation from reality [Heroes aren't made, Frank, they're cornered...])
[ Post Reply | Private Reply | To 47 | View Replies]

To: Delta 21

So the equatorial speed of the star’s rotation is about 460 miles a second, mildly relativistic...I’ll bet the time distortions are interesting in that star’s vicinity.


49 posted on 12/26/2011 8:14:19 AM PST by mdmathis6 (Christ came not to make mankind into God but to put God into men!)
[ Post Reply | Private Reply | To 32 | View Replies]

To: null and void

Maybe a cheesy compromise would be a Parisian bear, but all I see is a pretty bleu Frog.


50 posted on 12/26/2011 8:32:25 AM PST by TheOldLady (FReepmail me to get ON or OFF the ZOT LIGHTNING ping list)
[ Post Reply | Private Reply | To 48 | View Replies]

To: SunkenCiv

1054 is the year usually attributed as the beginning of the formal Great Schism. I wonder if folks wondered about that back then, as in a “signs and wonders in the sky” sort of thing. I have poked around a little and some sites have it happening in the same week. Don’t know if that’s true or not. I guess it was visable for two years or so, and you could see it during the day for 23 days.

Now that would be some serious pre-planning, like 6,500 years!

Freegards


51 posted on 12/26/2011 8:38:31 AM PST by Ransomed
[ Post Reply | Private Reply | To 1 | View Replies]

To: SunkenCiv

52 posted on 12/26/2011 9:07:53 AM PST by JoeProBono (A closed mouth gathers no feet - Mater tua caligas gerit)
[ Post Reply | Private Reply | To 1 | View Replies]

To: TheOldLady

Nope, both Frog and bear are in there, but in order to go along and not be trampled by frog loving FReepers I have conceded that we re-name it the Frog Nebula.


53 posted on 12/26/2011 9:10:27 AM PST by calex59
[ Post Reply | Private Reply | To 47 | View Replies]

To: calex59; null and void
That's very nice, but no one's going to trample you, and we already have Ursae Major and Minor.

Happy Boxing Day!


54 posted on 12/26/2011 9:21:53 AM PST by TheOldLady (FReepmail me to get ON or OFF the ZOT LIGHTNING ping list)
[ Post Reply | Private Reply | To 53 | View Replies]

To: dagogo redux

It’s been moving outward for hundreds of years, and at very high velocities, but the different materials have different masses; the lighter stuff is moving faster.


55 posted on 12/26/2011 5:38:18 PM PST by SunkenCiv (Merry Christmas, Happy New Year! May 2013 be even Happier!)
[ Post Reply | Private Reply | To 38 | View Replies]


Navigation: use the links below to view more comments.
first previous 1-2021-4041-55 last

Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.

Free Republic
Browse · Search
General/Chat
Topics · Post Article

FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson