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.
Light pollution is defined as any source of artificial light that shines outside the area it is intended to illuminate. It has become a growing problem for the past couple of decades and is a particular problem for astronomers as they are quite literally blinded by the light.
Spinning space stations are a staple of Sci-Fi, from Babylon 5 to Space Station 1 in the film 2001: A Space Odyssey. Inhabitants live in simulated artificial gravity, but it is not the same as that experienced on Earth. Can spinning spacecraft provide artificial gravity?
The Messier Objects are a set of astronomical objects catalogued by Charles Messier in his catalogue of Nebulae and Star Clusters first published in 1774. The original motivation behind the catalogue was that Messier was a comet hunter, and was frustrated by objects which resembled but were not comets. He, therefore, compiled a list of these objects.
The Kuiper belt is an area of the solar system extending from the orbit of Neptune (at 30 AU) to 50 AU from the Sun. The objects within the Kuiper Belt together with the members of the scattered disk extending beyond are collectively referred to as trans-Neptunian objects.