What are Stars?

A star is a massive ball of plasma (very hot gas) held together by gravity. It radiates energy because of the nuclear reactions inside It radiates heat and light, and every other part of the electromagnet spectrum, such as radio waves, micro-waves, X-rays, gamma-rays and ultra-violet radiation. The proportions vary according to the mass and age of the star.

facts about stars

There are about 400 billion stars in the galaxy and about 500 billion galaxies

It is the turbulence in the sky that causes the stars to look lie they are are blinking

the sun is the smallest star

Stars are usually between 1 and 10 billion years old

There are approximately 200-400 billion stars in our galaxy

The nearest star to Earth is the Sun

What are stars made of?

Stars a big exploding balls of gas,mostly hydrogen and helium.Our nearest star,the Sun, is so hot that the huge amount of hydrogen is undergoing a constant star-wide nuclear reaction like in a hydrogen bomb

why stars shine

The scientific name for the twinkling of stars is stellar scintillation (or astronomical scintillation). Stars twinkle when we see them from the Earth's surface because we are viewing them through thick layers of turbulent (moving) air in the earth atmosphere.