Nieves penitentes on Earth's second highest volcano could offer insight in the search for extraterrestrial life.
The ocean is thought to be be billions of years old and may contain as much as three times the volume of all the liquid water on Earth.
At its closest, the planet's orbit will take it within around 398 million miles of Earth on June 12.
Where do they come from? How do they work? And of course, will they help us find aliens?
There are about 400 subglacial lakes around the world, but these are the first scientists believe to be salty.
Recent studies have delivered encouraging signs—here's what we now know.
"This is the first time an ecosystem has been found to survive directly on the basis of nuclear energy."
Right now, it's impossible to know how thick the stuff at Europa's surface may be.
Ice, ice, baby—and flowing ice, at that.
Saturn's Enceladus has become a prime search location for alien life as potentially habitable waters appear to flow beneath its icy crust.
Don't cry too much about Cassini. Upcoming missions are going to Mars, Mercury, the Sun, Europa and several asteroids.
Two waves were spotted sweeping across the enormous lake thanks to rare alignment of Io and Europa.
The apparent plumes could allow scientists to test for signs of microbial life.
Scientists are hoping that Juno can reveal how Jupiter was formed.
A video published by NASA on Monday shows Jupiter's largest moons moving around the planet.
The incident occurred at Lokomotiv Moscow's Europa League match with Fenerbahçe.
The space agency's main goal there will be to see if life is sustainable.