How do we know the mass of a planet originally appeared on Quora - the knowledge sharing network where compelling questions are answered by people with unique insights. Answer by Geoffrey Widdison on ...

As the New Horizons spacecraft is approaching Pluto, it's getting some great shots. The animation below shows Pluto and Charon as they orbit each other. When a planet (or dwarf planet) has a satellite ...

Everyone knows Luke Skywalker travels to Dagobah to learn the ways of The Force (like his father before him). He trains with Jedi master Yoda. Perhaps you recall the scene where Luke does a one-armed ...

Reaching out: a huge coronal mass ejection that was spotted in 2012 by the ESA/NASA Solar Heliospheric Observatory. (Courtesy: NASA/Goddard Space Flight Center) Originating from the Sun’s dynamic ...