Correct-Answer to Question #26:
How are solar systems formed?

Q.  How are solar systems formed?

A.  Space everywhere contains "Oort Soup", a mix of planetesimals and planets of every size. Over time, these may aggregate together. When an aggregation reaches the mass of a star, this forms the beginning of a solar system.

Q.  What's the lower limit of a star's mass?
A.  It's about 7.5% of the mass of our Sun.

Q.  What qualifies a body of this mass to be a star?
A.  That's the minimum mass for nuclear fusion to begin at its core.

Q.  What forms first in a solar system, the star or its planets?
A.  Surprisingly, the planets exist first, as components of the Oort Soup. When aggregation leads to a new star, this has to normalize the motion of other bodies in its vicinity.

Q.  How does it do this?
A.  Through the action of a gravity, an effect called Equatorial Forcing.

Q.  Where is there more detail on this?

Go to the Correct-Answer Home Page and List of Questions.