If a Star was a mass structure ,How was it lit?What kind of activation did it go thru to make it burn?

Answer 1

In a fusion bomb, a small fission charge is used to compress the fuel mass enough to initiate the primary fusion explosion. In a star, the gravity exerted by the enormous accumulated mass does the same thing.

Answer 2

The sun started as a giant cloud of gas. There was so much gas, that its gravity pulled it together, and pulled in more gas from outer space. The gas was mostly hydrogen, plus a little bit of other stuff, like helium.

Then the gravity pulled the gas into a giant ball. At the center of the ball, the pressure got very high. Plus, the gas was very hot. So the atoms of hydrogen were moving very fast, and they were very close to each other. At first, they just bounced off each other. But the pressure got higher and higher, and eventually the atoms were smashed together so hard, that they stuck together. That's called nuclear fusion.

When two hydrogen atoms fuse together, a lot of new energy comes out. Also, two hydrogen atoms fused together make a helium atom.

Answer 3

The gravity of the sun is sufficiently strong to heat up the core and cause nuclear fusion. Hydrogen becomes helium and gives off energy.

Answer 4

the sun is lit via nuclear reaction, the same way nuclear bombs produce tremendous amount of energy from relatively small amount of radioctive matter.