Astronomy?s

cheshirecatstevens
Posers and Puzzles 30 Nov '06 04:26
1. 30 Nov '06 04:26
The apparent expansion rate a nebula is 0.43 arcsec per year. The apparent size of the nebula is about 4 by 5.7 arcmin. If the expansion rate remains constant, calculate how long it will be until the long axis of the nebula has the same apparent size as the full moon (0.50 degree or 1800 arcsec).
2. KJCavalier
Happier Now!!
30 Nov '06 04:28
Originally posted by cheshirecatstevens
The apparent expansion rate a nebula is 0.43 arcsec per year. The apparent size of the nebula is about 4 by 5.7 arcmin. If the expansion rate remains constant, calculate how long it will be until the long axis of the nebula has the same apparent size as the full moon (0.50 degree or 1800 arcsec).
why?
3. 30 Nov '06 04:29
Originally posted by KJCavalier
why?
He has no friends in the real world.
4. 30 Nov '06 04:34
Originally posted by treetalk
He has no friends in the real world.
None that are smart enough to figure that out.
5. huckleberryhound
Devout Agnostic.
30 Nov '06 04:35
Nebula are stupid
6. GalaxyShield
Mr. Shield
30 Nov '06 04:35
Originally posted by huckleberryhound
Nebula are stupid
Nebuli*
7. huckleberryhound
Devout Agnostic.
30 Nov '06 04:38
Originally posted by GalaxyShield
Nebuli*
Is that you Nordlys ?
8. GalaxyShield
Mr. Shield
30 Nov '06 04:48
Originally posted by huckleberryhound
Is that you Nordlys ?
Yes. I phished Galaxy's password and logged into his account to sabatage his happenings here. The next time he logs on he'll find he's suddenly losing 200 games.
9. blakbuzzrd
Buzzardus Maximus
30 Nov '06 04:56
Originally posted by GalaxyShield
Yes. I phished Galaxy's password and logged into his account to sabatage his happenings here. The next time he logs on he'll find he's suddenly losing 200 games.
Nordlys just misspelled sabotage.

She's clearly slipping.
10. GalaxyShield
Mr. Shield
30 Nov '06 04:58
Originally posted by blakbuzzrd
Nordlys just misspelled sabotage.

She's clearly slipping.
Nobody's perfect.
11. 30 Nov '06 23:511 edit
And pobody's nerfect two
12. 01 Dec '06 12:02
1004.6511 years??? not sure. but this might be it.
13. 01 Dec '06 21:241 edit
I do know that this flag is astronomically incorrect. Can anyone tell me why?

http://www.iacn.org.uk/images/flag.jpg
14. 02 Dec '06 12:27
Originally posted by dmnelson84
I do know that this flag is astronomically incorrect. Can anyone tell me why?

http://www.iacn.org.uk/images/flag.jpg
The black zone of the moon is not transparent.
The star is behind the moon and shouldn't be visible.

But in reality it is not a star at all, but an impact of a meteor striking the dark surface of the moon. The artist just draws it as a starlike feature.
15. AThousandYoung