is this true?

Question

Most stars are formed as gravity collapses a gas cloud. As it forms, the cloud forms a disk around it, and planets form from the disk.

Answer 1

Yes. The disk is called an "accretion disk." It forms because as the cloud condenses, it begins to rotate--and the interaction of gravity and rotation cause the gas cloud to "flatten out."

Since the cloud is swirling around, small concentrations of matter form at random, creating small centers of gravitational attraction. A few of these start drawing more and more matter into them as they swirly around the developing star. Some form comets or asteroids. The biggest ones eventually collepse under gravity themselves, forming the new planets.

Answer 2

That is correct, at least it's the going theory right now. It interests me is that computer models show two ways for planets to materialize.

The first one is that debris orbits the center mass of gravity, the star, and slowly materialize over millions of years.

The second, which is much like the first, supposedly occurs when a star is already surrounded by large chunks, such as an asteroid belt. Supposedly planets can form in as little as a few hundred years this way.

I don't think that the going theory is correct because to me it doesn't seem plausible that matter will build on itself that way. From what I've witnessed things are infinitely more likely to fall apart than come together; houses don't build themselves.

Answer 3

That's the current theory. It is now felt that many planets may actually be 'captured' meteorites or asteroids.

Answer 4

True or not, it is a good theory that can explain current observations in the visible universe.

Answer 5

Yep, you've got it right..! You may want to take a look at this website for more detailed stuff plus graphics ==>http://www.astronomynotes.com/solfluf/s11.htm