Achernar, a blue-white star in the constellation Eridanus. Achernar has an apparent magnitude of 0.5, making it one of the brightest stars in the nighttime sky. It is visible only from locations south of about 32 North latitude. The star has an absolute magnitude of -2.3 and is approximately 118 light-years from the earth.
Although other planets have rings, none are as spectacular as Saturn's. What makes the planet's stratified rings, and how did they get there in the first place?
After Viking 1 captured images of what looked like a face on Mars, the public began to speculate. Had Martians carved a colossus, or was there another answer?