Observational astronomy 3.1 Radio astronomy 3.2 Infrared astronomy 3.3 Optical astronomy 3.4 Ultraviolet astronomy 3.5 X...
Nearby examples of (dwarf) irregular galaxies include the Magellanic Clouds . [ edit ] Dwarfs Main article: Dwarf galaxy...
Unsourced material may be challenged and removed. (November 2007) v • d • e General subfield...
They theorized the universe was very hot at the time of the big bang (the point at which the universe explosively expand...
All elliptical galaxies probed so far have super massive black holes in their center, and the mass of these black holes ...
One of the challenges for astronomers in the 21st century will be to try to determine the properties of both dark matter...
Giant stars are not necessarily more massive than other stars—the outer layers of giant stars are just more spread out. ...
