nov 092013
Anne's Image of the Day: Lenticular Galaxy NGC 1316

November 9, 2013 NGC 1316, a giant lenticular galaxy in Fornax Image Credit & Copyright: Martin Pugh Astrophotography NGC 1316 (also known as Fornax A or Arp 154) is a giant lenticular galaxy that lies around 62 million light-years away from Earth in the southern constellation of Fornax, while it is racing away from us [continue reading]

okt 182013
Heaviest Black Holes Grown Up in Galactic Cities

  A research team, led by a researcher at the National Astronomical Observatory of Japan (NAOJ), discovered that the heaviest black holes tend to be located in galactic environments with higher density. This finding indicates that galaxies in a dense area often merge together, causing the growth of supermassive black holes. An artist’s illustration of galaxy distribution, [continue reading]

jan 282013
 When the Lights Go Out in a Galaxy

  The further away you look, the further back in time you see. Astronomers use this fact to study the evolution of the Universe by looking at nearby and more distant galaxies and comparing their features. Hubble is particularly well suited for this type of work because of its extremely high resolution and its position [continue reading]

okt 252012
Mysterious Infrared Background Glow Comes From Stray Stars

  A new study using data from NASA’s Spitzer Space Telescope suggests a cause for the mysterious glow of infrared light seen across the entire sky. It comes from isolated stars beyond the edges of galaxies. These stars are thought to have once belonged to the galaxies before violent galaxy mergers stripped them away into [continue reading]

jun 232012
Galaxy Developed from Multiple Mergers

  A team of astronomers led by Professor Yoshiaki Taniguchi (Ehime University) has concluded that the ultraluminous infrared galaxy (ULIRG) Arp 220 (Figure 1) developed from a multiple merger among four or more galaxies. Their new imaging data from the Subaru Telescope and optical spectroscopy from the W. M. Keck Observatory revealed two tidal tails [continue reading]

jun 202012
Most Quasars Live on Snacks, Not on Large Meals

  Black holes in the early universe needed a few snacks rather than one giant meal to fuel their quasars and help them grow, a new study shows. The galaxies in these four images have so much dust surrounding them that the brilliant light from their quasars cannot be seen in these Hubble Space Telescope [continue reading]