SOLAR SYSTEM

Detailed explanation-1: -Star-Forming Nebula These knots contain sufficient mass that the gas and dust can begin to collapse from gravitational attraction. As it collapses, pressure from gravity causes the material at the center to heat up, creating a protostar. One day, this core becomes hot enough to ignite fusion and a star is born.

Detailed explanation-2: -A star is born when atoms of light elements are squeezed under enough pressure for their nuclei to undergo fusion. All stars are the result of a balance of forces: the force of gravity compresses atoms in interstellar gas until the fusion reactions begin.

Detailed explanation-3: -A nebula is a cloud of gas and debris in space, while a star is a very hot agitated ball of gas. Nebulae can be seen where new stars are being created but also can be the dust that’s left over once a star dies. They can be visible from Earth and vary in shape and size.

Detailed explanation-4: -It is in these nebulae that dust and gas can come together to form stars. A star is not truly a star until it can fuse hydrogen into helium. Before that, they are called Protostars. A protostar is formed as gravity begins to pull the gases together into a ball.