Chances are you've never heard of Dome A. It's 600 miles from the South Pole, and if astronomers are right it could soon prove to be the best observing site on Earth.
It's nothing more than an inconspicuous blemish in the Sun's northern hemisphere, but a new sunspot has heralded the start of the next 11-year-long cycle of solar activity.
After many delays (and near termination), NASA's ambitious asteroid mission is finally under way following a picture-perfect launch on Thursday.
This year's Edgar Wilson Award went to three unique amateur comet discoverers.
The Mars rover Opportunity will soon make a risky but scientifically rewarding descent into Victoria crater.
Following a trail of charged particles, Cassini scientists find that two more of Saturn's moons may be active.
Scientists release the first pictures taken during the Messenger spacecraft's flyby of Venus last week.
NASA's Mercury-bound spacecraft scrutinized Earth's sister planet with its complement of instruments and teamed up with Europe's Venus Express orbiter.
Hubble has taken a super-high resolution image of M81 and found star clusters, dust, glowing regions of gas, and more.
Astrophysicists have developed a new way to measure the mass of black holes by watching how matter clumps before it falls in.
On February 16th, at the bottom of the world, engineers pointed a brand-new telescope toward Jupiter, cooled its detectors to an unfathomable ¼° above absolute zero, and collected "first light."