Category Archives: moons

The Sights and Sounds of Titan!

Courtesy the Cassini-Huygens Mission Mission to Saturn and Titan
Courtesy the Cassini-Huygens Mission to Saturn and Titan

Yesterday I returned home from the AAS meeting. It was a long flight day, and I logged some airport time waiting for flights. So I decided to try out the ever-present T-Mobile wireless hotspots to see if I could check on the progress of the Huygens data from Titan and the Cassini-Huygens mission via their websites. I’m sure everybody’s seen the images by now. We’re in a great age of planetary exploration when we can tune in to the latest pics from Mars and Saturn every day, if we so wish it! I can pretty well guess how excited the scientists were to find out that their probe had settled down to the surface of Titan and had returned a treasure trove of 90 minutes worth of data before falling silent.

And what a collection! I’d always pictured Titan as this place with hydrocarbon-sludge oceans and maybe a frozen surface. So, the pictures were not a total surprise in that regard. But it was still exciting to see actual rocks and a surface. A friend of mine called this morning and said that it reminded him of Venus, only many hundreds of degrees colder!

If you browse around the Cassini-Huygens web site, you’ll find more pictures, plus a neat page of “sounds” from Titan. It will be interesting to see what else they post in the next few days that will shed more insight into a world that once was hidden and veiled—and still holds surprises for us all.

All these Worlds…

In Arthur C. Clark’s novel, 2010, the story ends with a warning to humans ready to explore the Jovian moons: “All these worlds are yours — except Europa. Attempt no landings there.” In the next book, we learn that life has made a foothold on this icy-looking world.

Science fiction or science fact? It is possible that life could exist in water oceans beneath the thin ice crust of this little moon. Is it probable? We don’t know.

Conamara Chaos on Europa
Conamara Chaos on Europa

The Voyager and Galileo missions have mapped this world extensively, studying its icy surface. In the image shown here (taken by the Galileo spacecraft’s cameras), we see an area on Europa called the Conamara region. It is basically a frozen set of “ice rafts” created when large blocks of ice were disrupted during an impact. After the ripples from the crash died down, these “rafts” and criss-crossed cracks froze into place on the little moon’s surface. This event formed a crater Pwyll, which lies 1000 kilometers (640 miles) away.

Beneath this jumbled icy terrain lies an ocean of what is probably slushy ice water. At the core of this tiny world, there could be heat — generated by the continual and combined tidal pull of Jupiter on one side of Europa and the outer moons on the other side. If there IS heat at the center of this watery world, it’s possible that life could survive there. But, for now, we don’ t know if there are any Europan life forms colonizing these oceans. That discovery awaits future visits by robotic spacecraft, and eventually — human explorers.