Astrophysical Journal

Setting a trap for gravity waves

In 1996 Uros Seljak was a postdoc at Harvard, contemplating ways to extract information from the cosmic microwave background (CMB). The distribution of anisotropies, slight temperature differences, in the ...

Mar 19, 2014 4.8 / 5 (18) 12

Planet X myth debunked

It was an elusive planet that for 200 years appeared to explain Uranus's wobbly orbit. And there was the sister sun theorized to be near our solar system that caused asteroids to swerve toward Earth.

Mar 16, 2014 3.8 / 5 (42) 61

Image: Star factory NGC 7538

(Phys.org) —The billowing clouds portrayed in this image from ESA's Herschel observatory are part of NGC 7538, a stellar nursery for massive stars. Located around 9000 light-years away, this is one of the ...

Mar 04, 2014 5 / 5 (9) 59