Gaze upon all of Mercury for the first time ever

The existence of our solar system's innermost planet has been common knowledge since ancient times, but that doesn't actually mean we've always know much about it. Mercury's proximity to the Sun has allowed it to jealously guard its secrets, and so this NASA video offers an unprecedentedly detailed view of the… » 6/16/13 11:00am 6/16/13 11:00am

This "comet factory" reveals first secrets of planetary formation

Planets have to start out somewhere, and the leading theory is that they begin as dust particles clumping together to form larger and larger building blocks, before finally emerging eons later as full-blown planets. But the exact physics that would allow such clumps to form has long been frustratingly unclear. » 6/09/13 5:00pm 6/09/13 5:00pm

One of the first exoplanets ever discovered could actually be made of…

Remember 55 Cancri e? Sure you do — and if you don't, you should. After all, it may be the first diamond planet ever discovered that orbits a Sun-like star. At least we think it is; if there's one thing 55 Cancri e is good at, it's fooling astronomers into thinking it's something that it's not. » 10/11/12 11:28am 10/11/12 11:28am