Which factor causes gas and dust to pull together during the first stage of star formation?
density
gravity
heat
pressure
Answers
Answer:
gravity
seened in facttechz's video
Stars are massive balls of fire that produce a tremendous amount of heat and light. The star is a fixed shining dot that you see in an infinite dark blue sky, like fireflies glowing in the summer night.
Explanation: These hydrogen and helium elements combine to increase the mass at the cloud's core due to gravity's constricting influence. The gravitational attraction rises as mass increases. All molecules and particles in the vicinity are drawn in by the gravitational force
As the molecules continue to fall on the cloud's core, the cloud's mass grows, and the cloud's centre begins to heat; this heated centre is known as a protostar. As the protostar continues to pull additional molecules towards itself, the temperature of the protostar rises. The temperature rises until the pressure rises to the point where two hydrogen atoms fuse, releasing heat and radiation to make helium.
Nuclear fusion is the process of fusing two hydrogen atoms to generate helium while releasing enormous amounts of energy.
The inward force caused by gravity is then balanced by the outward force created by the released heat and radiation. The moment the force is balanced both inward and outward, the star is born.