AmericaSpace Launch Countdown

Next Launch GPS IIF-8 on a Atlas V 401 rocket from Cape Canaveral AFB, FL
scheduled for:
29 Oct 14 17:21:00 GMT
29 Oct 14 13:21:00 EDT

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Saturn's Moon Mimas May Have an Underground Ocean—or Just a Weird Core

Mimas, a cold, icy, and tiny moon of Saturn, may have a liquid water ocean below its heavily cratered surface. Photo Credit: NASA/JPL/SSI

It wasn’t that long ago that Earth was thought to be the only place in the Solar System capable of having liquid water oceans, but now we know of several moons that [...]

It's Back! 'Mystery Island' in Titan Sea Makes Unexpected Reappearance

Three radar images, taken from April 2007 to August 2014, showing how the “mystery island” in Ligeia Mare has changed in appearance over time. Image Credit: NASA/JPL-Caltech/ASI/Cornell

The mystery of an unusual feature in one of Titan’s hydrocarbon seas, dubbed the “mystery island,” has taken an interesting turn. After apparently disappearing following its initial [...]

Cassini at Saturn: 10 Years of Amazing Planetary Science and More to Come

Mosaic image showing Saturn backlit by the Sun, one of the most beautiful and surreal photographs sent back by Cassini. Image Credit: NASA/JPL-Caltech/Space Science Institute

The Cassini mission to Saturn has been one of the most successful and exciting in all of space exploration history. That amazing spacecraft is now celebrating its 10th anniversary today [...]

Solar System's Largest Moon Ganymede May Have 'Club Sandwich' Oceans

Illustration depicting the “club sandwich” layers of oceans and ice in Ganymede’s interior. Image Credit: NASA / JPL-Caltech

Europa and Enceladus, for good reason, have captured the attention and imagination of those searching for evidence of life elsewhere in our Solar System. Both moons are now thought to have subsurface oceans with conditions where [...]

The Sea of Enceladus: Cassini Confirms Underground Ocean on Saturn's Geyser Moon

Diagram of what the interior of Enceladus is now thought to look like, with the icy outer shell, liquid water ocean, and inner rocky core. Image Credit: NASA / JPL-Caltech

Coming just after the news of the ringed asteroid and new dwarf planet, some more exciting news from the outer Solar System was announced [...]

Past Oceans on Mars? Maybe - Maybe Not

Did Mars once have oceans? Dueling theories provide conflicting pasts for the Red Planet. Image Credit: NASA / Goddard Space Flight Center

The debate over the history of water on Mars first began even before the first spacecraft flew by the planet. But after Mariner 4 scientists learned that Mars was currently devoid of [...]