File:Galileo's sketches of the moon.png - Wikipedia

The Best Proof that the Earth Spins – Of Particular Significance

Galilean moons - Wikipedia

2 Small Bodies: Background and Considerations, Planetary Protection Considerations for Missions to Solar System Small Bodies: Report Series—Committee on Planetary Protection

Monster High by Airi Monster high characters, Monster high boys, Monster high

Understanding Saturn, its rings, and its moons: The Cassini-Huygens Mission

Galilean moons - Wikipedia

Johannes Kepler: an astronomer, Blog

Archimedes, A Mathematician With An Obsession

File:Galileos Moon.jpg - Wikimedia Commons

Starfield Spaceship Guide

1 Understanding Science – An Introduction to Geology

Io (moon) - Wikipedia

Solar Flare Disaster - TV Tropes

Does the Moon during winter at the South Pole change phases while staying in the sky without setting for weeks? Does the same thing happen at the northernmost land in the Arctic?