TNPSC Current Affairs May 2017
1.Largest map of universe created with quasar positions.
Astronomers and scientists from the Sloan Digital Sky Survey (SDSS), have created the largest map of universe based entirely on the positions of Quasars. Quasars are the incredibly bright and distant points of light powered by super-massive black holes.
- Quasars are the brightest and the most distant objects in the Universe. Astronomers are still not sure what exactly these objects are, but what we know is that they emit enormous amounts of energy.
- Quasars are so bright and can see them all the way across the universe, that makes them the ideal objects to use to create the largest map in Universe.
- The amazing brightness is due to the super- massive black holes found at their centres of Quasars.
- As matter and energy fall into a quasar's black hole, they heat up to high temperatures and begin to glow.