Galaxy rotation curve
Videos
The rotation curve of a disc galaxy is a plot of the orbital speeds of visible stars or gas in that galaxy versus their radial distance from that galaxy's centre. It is typically rendered graphically
Comparison of rotating disc galaxies in the present day (left) and the distant Universe (right).
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
Photograph of the "Great Andromeda Nebula" from 1899, later identified as the Andromeda Galaxy
The Galactic Center, as seen by one of the 2MASS infrared telescopes, is located in the bright upper left portion of the image.