Force and Motion: Facts. Motion makes the world go 'round. Motion makes the moon go 'round too. In fact, motion makes lots of things go. When we think of motion we often think of cars, bicycles, kids running, basketballs bouncing and airplanes flying.
What are stars made of? Basically, stars are 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. Even though it is constantly exploding in a nuclear reaction, the Sun and other stars are so large and have so much matter in them that it will take billions of years for the explosion to use all the fuel in the star.
How does heat travel from the sun to the earth? The sun is a star made from hydrogen that burns hot enough to fuse hydrogen nuclei together, which forms helium nuclei that release energy. The energy on the sun is known as solar radiation and, as it is electromagnetic, it has the properties needed to cut through space. This energy moves at 186,000 miles per second, allowing it to move fast enough to reach the Earth's surface.