Uranus’s largest moons, Titania and Oberon, may be hiding buried oceans. Surface temperatures averaging around -200°C mean the water-rich worlds are covered in ice, but radioactive elements deep ...
Paul M. Sutter is an astrophysicist at SUNY Stony Brook and the Flatiron Institute, host of Ask a Spaceman and Space Radio, and author of How to Die in Space. He contributed this article to ...