why the stars have light?

Question

stars

Answer 1

They are basically suns, but far away. Same principal as our sun.

Answer 2

Stars are not on fire. They are not burning (there is no oxygen in outer space you know). Nor do they create light by nuclear fusion.

Stars give out light because they are hot. All hot bodies radiate light energy. The hotter they are the more light energy they radiate away, and the more blue the light is.

Stars get hot because they form by particles falling onto them under gravity. The potential energy of the things that fall onto a forming star turns into kinetic energy of heat.

Stars continue to collapse under gravity and get hotter until something stops them. What stops them is that they become so hot that nuclear fusion starts to happen in their core. This keeps the core so hot that it produces so many photons that photon pressure stops the star collapsing any further.

When nuclear reactions stop in the centre of a star, it starts to collapse again under gravity. But our sun is a long way off that happening.

Answer 3

You know, the most abundant element in the universe is hydrogen. Stars are mostly made up of hydrogen. Inside a star, hydrogen is transformed into another element called helium. It undergoes a process called combustion. Turning hydrogen to helium releases tremendous amount of energy that powers a star for billions of years. Combustion releases heat and light. That is why stars gives off not only light but also heat as a form of energy.

Answer 4

All stars, including our own sun, create light from a process known as nuclear fusion. This is the same process that happens in a hydrogen bomb. Nuclear fusion is the conversion of hydrogen into helium.

Answer 5

Actually, most don't. What you are seeing is not light that the stars generate, but reflected light from suns.

Answer 6

Stars are big balls of burning gas. So they make light.

Answer 7

They are basically suns, but far away. Same principal as our sun.
if there are people or life forms in another galaxy ,they would see our sun as a star. and be asking the same question u are

Answer 8

Сгорая, водород выделяет свет, характерный для любого типа звезд.

Answer 9

Why does sun have light. Matters not!

Answer 10

nuclear fusion creates a lot of energy and this enery is converted into light and heat energy