SUNSET: 
Do Diamonds Rain on the Ice Giants?
New research shows diamonds might condense out of Neptune's mantle, but not Uranus', explaining a decades-old discrepancy.
Astronomers Spot A Tiny Binary System
A tiny binary system is not only small but also ancient, billions of years older than other such systems, which raises questions about its origins.
Ancient White Dwarf Hosts Planetary Graveyard
Scientists have discovered one of the oldest planetary graveyards in the Milky Way: a cool white dwarf "polluted" with rocky debris.
Shields Up: Red Dwarf Worlds Might Adapt to Hostile Systems
Worlds around red dwarf stars might build an ozone "shield" in response to stellar flares.