Huge-LQG
Videos
The Huge Large Quasar Group, is a possible structure or pseudo-structure of 74 quasars, referred to as a large quasar group, that measures about 4 billion light-years across. At its discovery, it was
Best image of bright quasar 3C 273
Parsec
Videos
The parsec is a unit of length used to measure the large distances to astronomical objects outside the Solar System, approximately equal to 3.26 light-years or 206,265 astronomical units, i.e., 30.9 t
As observed by the Hubble Space Telescope, the astrophysical jet erupting from the active galactic nucleus of M87 subtends 20″ and is thought to be 1.5 kiloparsecs (4,892 ly) long (the jet is somewhat foreshortened from Earth's perspective).
