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.
Scientists have discovered the existence of water on both our moon and on Mars. Both findings are significant, but what do they mean? Can we use this information to our advantage for space exploration?
The changing phases of the moon have given us an enduring curiosity about the dark side of the moon. But is there really a dark side of the moon? What would we see there?