Science

Phobos was photographed by the following probes: Mariner 7, Mariner 9, Viking 1, Phobos 2, Mars Global Surveyor, Mars Express, and Mars Reconnaissance Orbiter.

About 25% of the body's cholesterol is contained in the brain.

A galactic year is the period during which the Sun orbits the center of the galaxy.

Ganymede is the largest moon of Jupiter and the largest moon in the solar system.

The average temperature on its surface is -179.2 degrees Celsius.

Phobos is believed to be an asteroid that has been intercepted by the gravitational field of Mars.

The area of Deimos is only 483,05 square kilometers.

The historical landing was a part of the Apollo 11 mission.

The use of silver is very wide, mainly as a precious metal.

Several of Titan’s mountains are named for mountains from J. R. R. Tolkien literature (i.e. Moria Montes), and colles (collection of hills) are named after Tolkien’s characters (i.e. Arwen).