Rigel, or Beta Orionis, a bright star in the southwest corner of the constellation Orion. Rigel is a supergiant and one of the brightest stars known. In absolute magnitude it is some 50,000 times brighter than the sun. Although Rigel is a young star, it is using up its supply of hydrogen fuel at such a rapid rate that it will burn itself out in a few million years. Rigel is about 800 light-years distant from the earth.
Until recently, most people assumed that if Mars had liquid water, it no longer did and hadn't for quite some time. But scientists have recently noticed some anomalies in photos of Mars that may suggest there is water. Could there be life, too?
The sun warms our planet every day, provides the light by which we see and is necessary for life on Earth. But what is it exactly, and what will happen when it burns itself out?