jul 022013
Red Dwarfs Could Strip Away Protection of Their Planets

  Red dwarfs are the commonest type of stars, making up about 75% of the stars in our Galaxy. They are much smaller and much less massive than our Sun and for that reason a lot dimmer. If planets are found around these stars, then given the number of red dwarfs, life could then be [continue reading]

jan 262013
Pulsar Acts Like a Chameleon

  An international team – led by Dutch astronomers (SRON, NOVA and ASTRON) – has made a tantalizing discovery about the way pulsars emit radiation. The emission of X-rays and radio waves by these pulsating neutron stars is able to change dramatically in seconds, simultaneously, in a way that cannot be explained with current theory. [continue reading]

jan 212013
Auroras Also Occur Outside our Solar System

  University of Leicester planetary scientists have found new evidence suggesting auroras – similar to Earth’s Aurora Borealis – occur on bodies outside our Solar System. Auroras Bigger Than the Entire Earth: This image shows X-ray auroras observed by the Chandra X-ray Observatory overlaid on a simultaneous optical image from the Hubble Space Telescope of [continue reading]

sep 252012
Scientists Shed Light on Riddle of Sun's Explosive Events

  Four decades of active research and debate by the solar physics community have failed to bring consensus on what drives the Sun’s powerful coronal mass ejections (CMEs) that can have profound “space weather” effects on Earth-based power grids and satellites in near-Earth geospace.  A computer visualization of the Sun (red sphere) and its magnetic [continue reading]

sep 122012
Massive Star Has Extreme Large Magnetic Field

  A group of astronomers led by Gregg Wade of the Royal Military College of Canada have used the Hobby-Eberly Telescope (HET) at The University of Texas at Austin’s McDonald Observatory and the Canada-France Hawaii Telescope (CFHT) on Hawaii’s Mauna Kea to measure the most magnetic massive star yet. Their work is published in yesterday’s [continue reading]

aug 012012
Waves in Magnetosphere's Thin Boundaries

  Exploiting a favourable configuration of ESA’s Cluster mission spacecraft, scientists have detected and characterised lower hybrid drift waves, a special kind of plasma waves that develop in thin boundaries both in space and in the laboratory. The measurement of fundamental properties of these waves was possible when two of the spacecraft were flying very [continue reading]