nov 302013
Anne's Image of the Day: Planetary Nebula Abell 70

November 30, 2013 Abell 70, a planetary nebula in Aquila Image Credit & Copyright: Adam Block/Mount Lemmon SkyCenter/University of Arizona ( Abell 70 (also known as PN G038.1-25.4) is a planetary nebula that lies between 13,500 and 17,500 light-years away from Earth in the northern constellation of Aquila (the Eagle). It is approaching us at [continue reading]

okt 062013
Runaway Binary Stars are Leaving the Galaxy

  CfA astronomers made a remarkable and fortuitous discovery in 2005: an extremely fast moving star, clocked going over three million kilometers an hour. It appears to have been ejected from the vicinity of the galactic center’s supermassive black hole around 80 million years ago by powerful gravitational effects as it swung past the black [continue reading]

aug 042013
Hubble Finds 'Smoking Gun' After Gamma-Ray Blast

  NASA’s Hubble Space Telescope recently provided the strongest evidence yet that short-duration gamma-ray bursts are produced by the merger of two small, super-dense stellar objects. Compass and Scale Image for GRB 130603B. The galaxy (SDS J112848.22+170418.5) which resides almost 4 billion light-years away, produced the gamma-ray burst. Image Credit: NASA, ESA, and Z. Levay (STScI/AURA) The evidence [continue reading]

jul 182013
Stellar Monsters Do Not Collide...

  No hope for a spectacular stellar catastrophe   One might expect that collisions between the remains of monstrous stars, with masses reaching 200-300 times that of our Sun, would be among the most spectacular phenomena in the Universe. Perhaps they are, but we will unfortunately probably never have the chance to find out. Astrophysicists [continue reading]

jun 282013
Survivor of Stellar Collision is New Type of Pulsating Star

  A team of astronomers from the UK, Germany and Spain have observed the remnant of a stellar collision and discovered that its brightness varies in a way not seen before on this rare type of star. By analyzing the patterns in these brightness variations, astronomers will learn what really happens when stars collide.  Artist’s impression of [continue reading]

apr 272013
Record-Breaking Pulsar Shows Einstein Was Right — So Far

  Astronomers have used ESO’s Very Large Telescope, along with radio telescopes around the world, to find and study a bizarre stellar pair consisting of the most massive neutron star confirmed so far, orbited by a white dwarf star. This strange new binary system allows tests of Einstein’s theory of gravity — general relativity — [continue reading]