feb 052013
 
Massive Stellar Winds are Made of Tiny Pieces

  ESA’s XMM-Newton space observatory has completed the most detailed study ever of the fierce wind from a giant star, showing for the first time that it is not a uniform breeze but is fragmented into hundreds of thousands of pieces. Artist’s impression comparing a smooth stellar wind (left) with a highly fragmented stellar wind [continue reading]

okt 172012
 
Massive Galaxies See Big Meals and Snacks in Other Galaxies

  Gravity Lenses Suggest Big Collisions Make Galaxies Denser   Using gravitational “lenses” in space, University of Utah astronomers discovered that the centers of the biggest galaxies are growing denser – evidence of repeated collisions and mergers by massive galaxies with 100 billion stars. This image, taken by the Hubble Space Telescope, shows a ring [continue reading]

sep 262012
 
Asteroid Oljato's Mysterious Magnetic Disturbance

  Back in the 1980s, the arrival of asteroid 2201 Oljato inside the orbit of Venus heralded a flurry of magnetic activity. Now, results from ESA’s Venus Express spacecraft suggest that Oljato has lost its magnetic mojo. Dr Christopher Russell has presented an explanation for Oljato’s strange behaviour at the European Planetary Science Congress in [continue reading]

aug 192012
 
How the Solar Wind Heats Up When it Should Not

  New research led by University of Warwick physicist Dr Kareem Osman has provided significant insight into how the solar wind heats up when it should not. The solar wind rushes outwards from the raging inferno that is our Sun, but from then on the wind should only get cooler as it expands beyond our [continue reading]

aug 072012
 
Mystery of the “Monster Stars" Cracked

  In 2010 scientists discovered four ‘monster’ sized stars, with the heaviest more than 300 times as massive as our Sun. Despite their incredible luminosity, these exotic objects — located in the giant star cluster R136 in the nearby galaxy the Large Magellanic Cloud — have oddly so far been found nowhere else. Now a [continue reading]

jun 052012
 
Supermassive Black Hole Kicked Out of Home Galaxy

  Astronomers have found strong evidence that a supermassive black hole is being ejected from its host galaxy at a speed of several million miles per hour. New observations from NASA’s Chandra X-ray Observatory suggest that the black hole collided and merged with another black hole and received a powerful recoil kick from gravitational wave [continue reading]