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).

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).

Originally posted by KJCavalier
why?

Originally posted by treetalk
He has no friends in the real world.

Nebula are stupid

Originally posted by huckleberryhound
Nebula are stupid

Originally posted by GalaxyShield
Nebuli*

Originally posted by huckleberryhound
Is that you Nordlys ?

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.

Originally posted by blakbuzzrd
Nordlys just misspelled sabotage.

She's clearly slipping.

And pobody's nerfect two

1004.6511 years??? not sure. but this might be it.

I do know that this flag is astronomically incorrect. Can anyone tell me why?

http://www.iacn.org.uk/images/flag.jpg

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

Originally posted by FabianFnas
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.