jan 042014
 
A New Study of How Binary Stars Form

  Using the new capabilities of the upgraded Karl G. Jansky Very Large Array (VLA), scientists have discovered previously-unseen binary companions to a pair of very young protostars. The discovery gives strong support for one of the competing explanations for how double-star systems form. Binary star formation through disk fragmentation starts (left) with a young [continue reading]

mei 172013
 
Giant Outbursts from Binary Star System Revealed

  Using the new KAT-7 telescope in the Karoo and the existing 26 m radio telescope at the Hartebeesthoek Radio Astronomy Observatory (HartRAO), South African and international astronomers have observed a neutron star system known as Circinus X-1 as it fires energetic matter from its core in extensive, compact jets that flare brightly. The details [continue reading]

mrt 122013
 
The Third Closest Binary Star System Found

  A pair of newly discovered stars is the third-closest binary star system to the Sun, according to a paper that will be published in Astrophysical Journal Letters. The duo is the closest star system discovered since 1916. The discovery was made by Kevin Luhman, an associate professor of astronomy and astrophysics at Penn State [continue reading]

mrt 092013
 
The Universe Accurately Measured

  New results pin down the distance to the galaxy next door   After nearly a decade of careful observations an international team of astronomers has measured the distance to our neighbouring galaxy, the Large Magellanic Cloud, more accurately than ever before. This new measurement also improves our knowledge of the rate of expansion of [continue reading]

feb 222013
 
Distribution of Binaries in Young Star Cluster Explained

  Gravity remains the dominant force on large astronomical scales, but when it comes to stars in young star clusters the dynamics in these crowded environments cannot be simply explained by the pull of gravity. NGC 1818 is a very young globular cluster located in the Large Magellanic Cloud. Based on the populations of the different spectral classes [continue reading]

jan 042013
 
Anne's Picture of the Day: The Skull Nebula

 January 4, 2013 The Skull Nebula, a planetary nebula in Cetus Image Credit: NASA/JPL-Caltech/J. Hora (Harvard-Smithsonian CfA) The Skull Nebula (NGC 246) is a rather old planetary nebula of some 4 – 6 light-years across that surrounds a dying star, the white dwarf HIP 3678. It is located roughly 1,600 light-years away in the constellation [continue reading]