Learn the basics of astronomy with historical background and an introduction to the basic astronomy concepts, details about planets, satellites, asteroids, comets and meteors. Also learn the history of Astronomy from its origins in the religious, mythological, and astrological practices of prehistory through to modern astronomy.
Our view from Earth has always been pretty good, aside from clouds and glare. It was transformed by telescopes in the 1600s, though, and has improved wildly ever since. From X-ray telescopes to the atmosphere-bypassing Hubble Space Telescope, it's hard to even believe what we can see now.Learn Astronomy
Galaxy mergers occur when two or more galaxies collide. They are the most violent type of galaxy interaction. The gravitational interactions between galaxies and the friction between the gas and dust have major effects on the galaxies involved.Learn Astronomy
Since radio telescopes were developed, significant discoveries have been made. Here we list 5 amazing radio telescope discoveries.Learn Astronomy
Get back to basics and find out how energy underpins every process in the universe.Learn Astronomy