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 do as well, including Europa and Enceladus, and likely Titan and Ganymede as well. In all these cases, the oceans are below ground, similar to ocean water below ice sheets at the Earth’s poles. Now there is yet another moon which might be added to this special list: Saturn’s moon Mimas.
Category Archives: Cassini
Titan is the only moon in the solar system known to have a dense atmosphere, and while similar to Earth’s atmosphere in some ways, such as being rich in nitrogen, it also holds surprises for planetary scientists. Analysis of data from Cassini of a huge cloud which hovers over the moon’s south pole shows that it is both toxic and colder than expected.
Saturn’s largest moon, Titan, is a very alien yet eerily Earth-like world, with rain, rivers, lakes, and seas; seen from above, the landscape has a familiar look to it. But those lakes, seas, and rivers are fed by a different kind of rainfall – liquid methane/ethane. It is far too cold on the surface for liquid water, but the liquid hydrocarbons nicely fill in for H20 in Titan’s “water cycle.” Now, a new study shows how this rainfall interacts with and changes underground aquifers.
Saturn’s moon Titan is known for its methane seas, lakes, and rivers; surprisingly Earth-like in appearance yet distinctly alien at the same time. But there is also evidence for another ocean, this one of water, below the surface. Little is known about this hidden watery world, but now new results suggest it is likely very salty – as much as the Dead Sea on Earth.
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 orbiting the ringed planet, after having revolutionized our understanding of the Saturnian system, which is like another entire smaller-scale solar system. But there is still much more to come!
Titan is a complex world, reminiscent of our own planet in many ways, with mountains, seas, lakes, rivers and rain. Albeit the liquid on this super-cold moon is methane/ethane instead of water, but the visual similarities are striking. Just how geologically active Titan might be in other ways however isn’t really known yet, but a new discovery might provide some clues. What looks like a new small “island“ has appeared in one of the hydrocarbon seas, where it wasn’t before. Is it really an island, or something else?
The Cassini spacecraft, still in orbit around Saturn, has taken another “wow” photograph of something other than the ringed giant planet – the much more distant ice giant planet Uranus!