Homework Help: science

Posted by ant on Monday, August 16, 2010 at 5:04pm.

which of the statements below is true?

a) the stars in a galaxy are held together by gravity
b) Stars in a galaxy slowly rotate around a center
c) The Milky Way is the only galaxy in the universe
d)All of the above

just need to know if my answer is correct or wrong d

science - Ms. Sue, Monday, August 16, 2010 at 5:14pm
Since c) is wrong, d) can't be right.

http://en.wikipedia.org/wiki/Galaxy
science - ant, Monday, August 16, 2010 at 5:22pm
a ms sue
science - Ms. Sue, Monday, August 16, 2010 at 5:29pm
Right.
science - ant, Monday, August 16, 2010 at 5:35pm
thanks
science - drwls, Monday, August 16, 2010 at 10:20pm
b is also true, for most stars anyway.

If they did not rotate about the center, they would all collapse there.

Some have already; that's why there is a black hole at the center.

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