Galaxy
Videos
A galaxy is a physical system of stars, stellar remnants, interstellar gas, dust, and dark matter bound together by gravity. The word is derived from the Greek galaxias, meaning 'milky', a reference t
NGC 4414, a typical spiral galaxy in the constellation Coma Berenices, is about 55,000 light-years in diameter and approximately 60 million light-years from Earth.
Photograph of the "Great Andromeda Nebula" by Isaac Roberts, 1899, later identified as the Andromeda Galaxy
This ultraviolet image of Andromeda shows blue regions containing young, massive stars.
The galaxy cluster Abell 1413 is dominated by this cD elliptical galaxy designated Abell 1413 BCG. It has an isophotal diameter of over 800,000 light-years across. Note the gravitational lensing.
Milky Way
Videos
The Milky Way or Milky Way Galaxy, or simply the Galaxy, is the galaxy that includes the Solar System, with the name describing the galaxy's appearance from Earth: a hazy band of light seen in the nig
The Galactic Center as seen from Earth's night sky (featuring the telescope's laser guide star). Listed after this infobox is information about the Galactic Center.
The Milky Way as seen from a dark site with little light pollution
The Galactic Center, as seen by one of the 2MASS infrared telescopes, is located in the bright upper left portion of the image.