SUNSET: 
Study Suggests Jupiter Could Have 600 Moons
New detections of candidate moons suggest that the king of planets could have hundreds of smaller satellites.
Twinkling Quasar Hints at Mysterious Nearby Plasma Cloud
Radio observations have turned up evidence of a cloud of hot plasma near — or even in — the solar system. But its distance estimate is still up for debate.
The Origin of Earth’s Water
Scientists have discovered a new candidate source for Earth's water: building blocks of the primordial solar system known as enstatite chondrites.
How Did Pluto's Moons Form?
A massive collision with Pluto’s moon Charon could have formed the dwarf planet’s collection of smaller moons.
Hubble Captures Comet NEOWISE
The Hubble Space Telescope imaged the famous comet on August 8th.
Winds and Tides Drive Sea Waves on Titan
Sunlight glittering off rough patches of sea on Saturn’s largest moon indicates ever-changing waves.
Hints of Young Solar Systems
By studying the images of small young star systems, astronomers expect to learn more about the formation of our solar system.
Asteroid Ceres: An Ocean World
Scientists have thought that the largest main-belt asteroid, Ceres, had an ancient ocean beneath its surface. But new data from the Dawn spacecraft show the underground ocean might still be there.
Potential New Targets for Japan's Hayabusa 2 Mission
The Hayabusa 2 team has laid out a proposal for an extended mission to one of two asteroids after the spacecraft's sample return this December.
Radioactive Aluminum Sheds Light on Solar System History
Astronomers thought giant stars were reponsible for flooding the early system with a radioative isotope — but the Sun itself might have made it.
Was Early Mars "Wet and Warm"? Or Wet and Cold?
A new model suggests that Martian valley networks might have been created by ancient subglacial rivers rather than water flowing on the surface.
NASA Launches Perseverance Rover for Mars
NASA’s Perseverance rover heads to the Red Planet.
Cool Off with Pluto This Summer
Pluto might be a challenging target but it's well worth the effort. Grab your telescope and see if you can spot this distant, chilly world.
Three Missions Head for Mars
The summer of 2020 will see three spacecraft launch toward the Red Planet, each one with distinct objectives.
Long-lived Lunar Magma Ocean Points to a Younger Moon
Most lunar scientists today think that the Moon formed after a Mars-size body hit the still-forming Earth, launching enough material into orbit to form our satellite. But there is still lively debate about the age of the Moon, and its evolution after it formed. A Mars-size body smashed into Earth…
European Solar Orbiter Takes Closest-ever Images of the Sun
The first images to be released from the European Space Agency’s Sun-imaging spacecraft show intriguing “campfires” that could help explain a solar mystery.
Comet NEOWISE Dazzles at Dusk
Comet NEOWISE has captivated skywatchers with its stunning tail. Now that it's moved into the evening sky and climbing higher each night even more people will get a chance to see it.
Amateur Astronomer Discovers "Clyde's Spot" on Jupiter
The discovery of a new feature on Jupiter gave NASA’s Juno mission an opportunity to image an emerging storm up close.
Venus Passes in Front of the Solar Corona (VIDEO)
Two astronomers captured the silhouette of Venus as it passed in front of the solar corona.
New Evidence for Nanoflares?
Astronomers have spotted weak bursts of low-frequency radio emission coming from all over the Sun.
