Vega is the brightest star in the constellation of Lyra, the fifth-brightest star in the night sky, and the second-brightest star in the northern celestial hemisphere, after Arcturus. It is relatively close at only 25 light-years from the Sun, and, together with Arcturus and Sirius, one of the most luminous stars in the Sun’s neighborhood.
Image credit: Darren Olley and Masahiro Miysaka
The Tarantula Nebula
Image Credit: Robert Gendler, Roberto Colombari
images of the Sun captured during the first year of NASA’s Solar Dynamics Observatory (SDO) mission.
Image Credit: NASA, ISS Expedition 40, Reid Wiseman
NGC 1999: Reflection Nebula in Orion
Credit: NASA/Hubble and Judy Schmidt
On the shore of Lake Dumbleyung
NGC3576 (right) and NGC3603 (left)
by Eddie Trimarchi
This simulation shows a star getting torn apart by the gravitational tides of a supermassive black hole. The star gets “spaghettified” and after several orbits creates an accretion disc. Scientists believe that the superluminous ASASSN-15lh event originated in this way. The view on the right is from the side and that at the left face on.
Credit: ESO, ESA/Hubble, N. Stone, K. Hayasaki