![](http://static.ddmcdn.com/gif/recipes/white-dwarf-alien-life-200x200-130226.jpg)
Earth-sized planets that host life should be far easier to
find around parent stars that are white dwarfs, the ultimate
incarnations of stars like the sun.
![](http://static.ddmcdn.com/gif/blogs/dnews-files-2013-02-russian-meteor-origin-200x200-130226.jpg)
Before it collided with Earth, the Chelyabinsk space rock was
a 10,000 ton meteoroid -- now astronomers think they know where it came
from.
![](http://static.ddmcdn.com/gif/blogs/dnews-files-2013-02-milky-way-halo-canibalism-200x200-130225.jpg)
Stars discovered in the Milky Way's halo could be what
remains of smaller galaxies that were eaten to form the our galaxy.
![](http://static.ddmcdn.com/gif/blogs/dnews-files-2013-02-comet-mars-impact-130225-200x200.jpg)
A recently discovered comet will make an uncomfortably-close
planetary flyby next year -- but this time it's not Earth that's in the
cosmic crosshairs.
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