Outer space surrounds us with it's dark blackness. But it's actually not as dark as it seems . . .
We couldn't live without the sun. The sun and stars are very important in our nightly and daily life. So let me tell you about stars . . . A star is actually an enormous glowing ball of gas, not a little yellow five-pointed shape as some of us seem to think. Our sun is a medium-sized star. That's right. Not big, or small, just right.
Stars can live for billions of years! That's older than my grampa! A star is made when a cloud of hydrogen gas collapses until it is hot enough to burn nuclear fuel! In about 5 billion years, the nuclear fuel runs out and while the star expands, the core contracts, becoming a gigantic star which eventually will explode. It will then turn into a dim object; either a black dwarf, a neutron star, or a black hole. The biggest stars have the longest life span. All groups of stars are held together by gravitational forces.
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