The first-ever photos of water ice near Mercury's north pole have come down to Earth, and they have quite a story to tell.
Last week's lunar eclipse wasn't just a show for Earthlings, NASA's MESSENGER mission was also watching from 66 million miles away. Continue reading →
Even though Mercury is one of the brightest objects in the sky, very few observers have ever seen the planet in the night sky. That's because it never strays very far from the sun, and is usually lost in its glare.
A vast and powerful space weather event has been observed at the solar system's innermost planet for the first time. Continue reading →
By now we've all realized that NASA's Mars rover Curiosity is a fine geologist. It's also a great geochemist. And now, once again, the six-wheeled rover has underlined the fact that it's a pretty damned good astronomer, too. Continue reading →
This month, stargazers have a chance to see the five brightest planets in the sky, weather permitting.
It's been 40 years since we first saw Mercury up close, and the flyby raised more questions than it answered.
An obsolete theory of the Earth works better than ever on Mercury, where new data reveals how much the hot little planet has shriveled since it first formed.
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