Displaying items by tag: astronomy

This interactive site from NASA introduces the properties of black holes. You can travel to and into a black hole and see what happens to certain objects when they cross the event horizon. Many exercises to help illustrate the text are provided.

Space Engine is a free space simulation program that lets you explore the universe in three dimensions, from planet Earth to the most distant galaxies. Areas of the known universe are represented using actual astronomical data, while regions uncharted by astronomy are generated procedurally. Millions of galaxies, trillions of stars, countless planets -- all available for exploration. You can land any planet, moon or asteroid and watch alien landscapes and celestial phenomena. You can even pilot starships and atmospheric shuttles.

A real-time 3d diagram of all the stuff in space around our planet. Click different objects to see the current positions of satellites, debris, etc., which shuttle launch they came from, their orbital velocities, and other interesting facts.