Mercury Is Shrinking

Future photos to reveal planet's unseen regions

(NEWSER) - A NASA spacecraft has captured the first photo of Mercury taken from orbit. The first of yesterday’s 363 images, shown at left, show the planet’s south pole. The gray surface is covered with craters, including a 53-mile-wide one known as Debussy. Other photos from the $464 million Messenger probe will likely reveal previously-unseen parts of the planet, Space.com reports; it's expected to circle the planet for a year. More»

(NEWSER) - Mercury's not such a dull planet after all. A new batch of papers in Science spells out evidence of a busy volcanic past and describes an unusual impact crater that would stretch from Boston to DC, reports Wired. The papers, which draw from the October flyby of NASA's Messenger craft, speculate that 40% of the planet's surface was formed by volcanoes. That's a huge shift—prior to Messenger's trip, scientists weren't sure if Mercury had any volcanic activity at all. More»

Kepler-22b averages 72 degrees and may have oceans

(NEWSER) - Finally, an Earth-like planet where the weather is nice enough for an occasional visit. Only, it's 600 light-years away. Today NASA announced the existence of Kepler-22b, the first-ever planet discovered in the "habitable zone" of a sun-like star—where temperatures are placid enough to allow for water, ScienceNOW reports. "It's a great gift," says one scientist. "We were very fortunate to find it." More»

Messenger data surprising scientists

(NEWSER) - Mercury is anything but the boring "burnt-out cinder" scientists once believed it was, say researchers analyzing data from NASA's Messenger orbiter. The spacecraft has now spent 88 days—one Mercurian year—circling the planet, and has sent back about 20,000 new pictures that strongly suggest that ice coats parts of the permanently shadowed craters near the planet's poles, reports the Los Angeles Times . More»

For every two suns, an Earth-like planet

(NEWSER) - Exciting news for alien enthusiasts: The discovery by NASA scientists of a vast trove of Earth-like planets orbiting distant suns boosts our chances of finding extraterrestrial life. Findings from the Kepler telescope revealed that for every two stars in the universe, one has an Earth-like "candidate planet" orbiting it, the Telegraph reports. Says a chief Kepler scientist, "I am really delighted that we are seeing so many candidate planets and that means there is a rich ocean of planets out there to explore." Before this, just two potentially habitable planets had been discovered outside our solar system. More»