The moon's south pole has never been explored from the ground, but India's new Chandrayaan-2 mission will attempt a 1st-ever landing there, with a rover, this September.
Distant water exoplanets might have oceans thousands of miles deep. That's in contrast to Earth's ocean, which is about 6.8 miles (about 11 km) deep at its deepest point.
Pluto's orbit is very elongated. Right now, it's in a part of its orbit where its distance from the sun is steadily increasing. That fact is devastating its atmosphere.
Researchers have discovered water in tiny dust particles from asteroid Itokawa. Japan's Hayabusa spacecraft brought the asteroid dust to Earth in 2010.
On May 6, 1968 - more than a year before his famous first moonwalk - Neil Armstrong narrowly escaped disaster during a training exercise, at the same time demonstrating the right stuff.
Solar sails use faint pressure from sunlight to propel a spacecraft forward. A next-generation solar sail - called a diffractive solar sail - might be made of metamaterials, or smart materials.
While searching for the source of methane on Saturn's large moon Titan, researchers found a completely unexpected corridor of methane ice wrapping nearly halfway around the moon.