SUNSET: 
Amateur Astronomer Finds “Lost” Moons of Jupiter
An amateur astronomer has recovered four of five "lost" Jovian moons.
Water on the Moon Isn't Just at the Poles
Water exists even on the sunlit Moon, a new study shows — trapped in glass beads but still extractable for lunar exploration.
Osiris-REX Finds Some of Solar System's Oldest Rocks on Bennu
NASA's Osiris-REX mission has found evidence of ancient water flows on the surface of asteroid Bennu.
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.
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.
Jupiter Has Trapped a Comet in a Bizarre Orbit
Jupiter has captured an icy comet from the outer solar system. The comet's bizarre orbit will bring it back for another super-close pass in 2063.
The Origins of Interstellar Objects
The first two interstellar visitors to the solar system are finally shedding light on their places of origin.
Is the Interstellar Comet 2I/Borisov Breaking Up?
New observations of the interstellar comet — which traveled unaltered for eons before arriving in the solar system — have revealed it's fragmenting
