The Hertzsprung-Russell diagram shows the relationship between a star's temperature and its luminosity. This image shows the relationship of the color to the temperature. This picture is great for any astrophysicist, physicist or physics lover in general.
Tags: physics, astronomy, astrophysics, milky-way, stars
Space is the place. Sometimes it's hard to fathom the size of our Sun. This will help. Featuring your favourite planets! Mercury, Venus, Earth (and it's moon), Mars, Jupiter, Saturn, Uranus, Neptune and a bonus dwarf planet - Pluto!
Tags: stars, planets, solar-system, space, sun
Sagittarius A* is believed to be a supermassive black hole at the center of the milky way galaxy. The event horizon is the area around a black hole in which the force of gravity is so strong that electromagnetic radiation cannot escape.
Tags: nerd, geek, science, space, chemistry