Gravity..
Gravity compresses gases at the center of a solar nebula until temperatures are high enough for nuclear fusion to occur
Nebula are formed when a star explodes, releasing its gas into a gas cloud (the nebula). the nebula then will eventually condense due to gravity and form another star.
Star formation starts in a nebula.
Gravitational pull of nebula materials on each other.
Matter from a nebula that has begun to condense under the weight of gravity to begin the formation of the star is "dust and gas".
Matter from nebula that condense make proto star.
The answer will depend on the amount of matter in the nebula.
Gravity..
If the nebula is gravitationally unstable, it collapsing & forming stars!
All bodies that have mass, have gravity. The Helix Nebula is a large planetary nebula and will have "loads" of gravity.
A nebula may condense and ignite to become a star, conversely a star may explode and form a nebula.
Gravity compresses gases at the center of a solar nebula until temperatures are high enough for nuclear fusion to occur
Nebula are formed when a star explodes, releasing its gas into a gas cloud (the nebula). the nebula then will eventually condense due to gravity and form another star.
A solar nebula is related to the formation of our Solar System, any other nebula is just a nebula.
No an nebula is held together by the balance of the inward force of gravity and outward pressure.
Star formation starts in a nebula.