Quasars. Quasars: quasars qua·sar [kwey-zahr, -zer, -sahr, -ser] Show IPA noun Astronomy . one of over a thousand known extragalactic objects, starlike in appearance and having spectra with characteristically large redshifts, that are thought to be the most distant and most luminous objects in the universe. Also called quasi-stellar object.
This is a deep image of the Sword of Orion - the three stars that make up the weapon hanging off the belt of this famous celestial hunter. The image showcases the amazing mix of physical and optical processes including atomic emission, Rayleigh scattering, reflection and absorbtion of light, that go on in this star forming region to create this kaleidescope of colours and details.
Andromeda in Infrared. It is the closest galaxy to the Milky way at about 250 million light years distant. It will collide with our own galaxy in a few billion years to create one massive galaxy. I wonder what will happen when the two super massive black holes at the centre of our galaxies collide?