nov 302012
 
Brown Dwarfs May Host Rocky Earth-Like Planets

  Astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) have for the first time found that the outer region of a dusty disk encircling a brown dwarf contains millimeter sized solid grains like those found in denser disks around newborn stars. The surprising finding challenges theories of how rocky, Earth-size planets form, and suggests that rocky planets [continue reading]

nov 112012
 
Incredible Number of Comet Collisions Explain Stellar Mystery

  Every six seconds, for millions of years, comets have been colliding with one another near a star in the constellation Cetus called 49 CETI, which is visible to the naked eye. An artsists concept of a “Kuiper Belt” with comets. Image Credit: NASA/JPL-Caltech Over the past three decades, astronomers have discovered hundreds of dusty [continue reading]