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]

aug 242012
 
Type Ia Supernovae Have Different Origins

  Exploding stars called Type 1a supernovae are ideal for measuring cosmic distances because they are bright enough to spot across the Universe and have relatively the same luminosity everywhere. Although astronomers have many theories about the kinds of star systems involved in these explosions (or progenitor systems), no one has ever directly observed one—until [continue reading]