A NASA spacecraft now has Jupiter more squarely in its sights ahead of its July 4 arrival at the solar system's largest planet.
Like the icebergs that float in Earth's Arctic Ocean, it seems Pluto has water ice 'hills' that float atop an ocean of frozen nitrogen.
Gravity measurements taken by the orbiting Rosetta spacecraft show the body of comet 67 P/Churyumov-Gerasimenko is about 75 percent dust and 25 percent ice all the way through.
Pluto's largest moon, Charon, is cloaked in darkness, with just a tiny sliver lit up by the distant sun, in a newly released photo.
Some of the greatest cosmic mysteries are closer to home than you may think.
What will the NASA spacecraft do when it reaches Jupiter this year?
China's quiet, barely publicized landing of a rover on the moon in 2013 has reaped lots of new data about our shiny nighttime friend. DNews digs into the geological details.
Pictures are still filtering back from NASA's New Horizons close-up of Pluto last year and one of the biggest surprises so far comes from the region informally known as Sputnik Planum.
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