Lake on Titan
Lake on Titan The footprint-like feature in the upper left corner of this image is Ontario Lacus, a hydrocarbon lake. It is roughly 234 kilometers long by 73 kilometers wide, about the size of Lake Ontario (a lake on the U.S.-Canadian border). The red cross below center identifies the location of Titan's south pole. NASA / JPL-Caltech / SSI

"We're changing the world. Are you in?"
- CEO Bill Nye

Sign up for email updates