Most scientists think our sun began as an immense cloud of gas and dust.
Stars that are growing old often shoot out enormous clouds of gas and dust. The gas and dust are made up of all kinds of chemicals. There are many such clouds in space. As these clouds move through space, they pull more and more gas and dust into themselves.Gravity pulls all the gas and dust together, tighter and tighter. Over many millions of years, the center of the cloud of gas is pulled into the shape of a gigantic ball.
Gravity squeezes this gas ball together so tightly its center is more dense than steel ! When gas is squeezed together that tightly, it becomes tremendously hot. The center of the gas ball grows so hot that it becomes an atomic furnace. The ball begins to glow with this fierce heat. It has become a star !
This is how all stars seem to form. Right now, out in space, new stars seem to be forming out of clouds of gas. And scientists think this is how our own sun began, about five billion years ago.
Stars that are growing old often shoot out enormous clouds of gas and dust. The gas and dust are made up of all kinds of chemicals. There are many such clouds in space. As these clouds move through space, they pull more and more gas and dust into themselves.Gravity pulls all the gas and dust together, tighter and tighter. Over many millions of years, the center of the cloud of gas is pulled into the shape of a gigantic ball.
Gravity squeezes this gas ball together so tightly its center is more dense than steel ! When gas is squeezed together that tightly, it becomes tremendously hot. The center of the gas ball grows so hot that it becomes an atomic furnace. The ball begins to glow with this fierce heat. It has become a star !
This is how all stars seem to form. Right now, out in space, new stars seem to be forming out of clouds of gas. And scientists think this is how our own sun began, about five billion years ago.
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