What are the differences between a solar system and a galaxy?
What is the process of accretion of matter to for stars and planets..
please tell me a site/s that i can read the information not just what u know....please please..
thanks
i've found it hard to give and answer to those questions
2007-03-14 19:00:27 · 3 answers · asked by David B 1 in Science & Mathematics ➔ Astronomy & Space
ASTRONOMY!!!
You are going to get a bunch of irate comments for mistaking astrology for astronomy.
2007-03-14 19:08:40 · answer #1 · answered by Anonymous · 1⤊ 1⤋
Galaxies are collections of tars orbiting a central mass, now believed to be a black hole in all cases. Since at least some of the stars are likely to have orbiting planets, a galaxy can be said to be a system of solar systems.
Accretion occurs when the orbit of some object intersects with the surface of a planet or star. Friction from the star's atmosphere retards speed of the object so that it no longer has escape velocity, and is therefore captured. With earth type (rocky) planets the collision is inelastic due to friction and the two bodies continue through space as one larger body.
Sites where you can read more are:
http://search.yahoo.com/search?ei=utf-8&fr=slv8-msgr&p=galaxies
http://search.yahoo.com/search?ei=utf-8&fr=slv8-msgr&p=solar%20system
http://search.yahoo.com/search?ei=utf-8&fr=slv8-msgr&p=stellar%20accretion
http://search.yahoo.com/search?ei=utf-8&fr=slv8-msgr&p=planetary%20accretion
2007-03-14 19:30:24 · answer #2 · answered by Helmut 7 · 0⤊ 0⤋
Astrology? You have GOT to be kidding.
2007-03-15 00:51:48 · answer #3 · answered by Anonymous · 0⤊ 1⤋