Exoplanets are worlds orbiting distant stars. Until recently, they existed only in the realm of imagination and probability. Now we know thousands! NASA's Exoplanet Travel Bureau lets you explore them.
From NASA, 2 decades of planetary change. See detailed views of volcanoes fuming, hurricanes flooding, dams being built, wildfires sweeping across landscapes and more.
New Horizons is boldly exploring where no spacecraft has before. It's the craft that swept past Pluto in 2015. Now it's preparing for its next encounter on January 1, 2019.
The discovery of methane dunes on Pluto is an indication of another way in which this planet mimics Earth, but in a way that is utterly unique and alien.
New research suggests that globular clusters - once thought to be nearly as old as the universe itself - aren't that old, after all. They might be only around 9 billion years old.