Spirographs, invented in 1962, are toys that create geometric patterns using gears. These designs are used in art and similar patterns can be found in nature.

A French astrophotographer recently snapped shots of the moon, Venus, Mars, Jupiter, Saturn, Uranus and Neptune in a single ...

NASA’s Hubble Space Telescope captured a cameo appearance of the tiny moon Phobos on its trek around the Red Planet. This composite image, from NASA Galileo and Mars Global Survey orbiters, of Earth ...

Because the Moon is over a quarter the diameter of Earth, the Earth-Moon system is often cited as the pairing in our Solar ...