Cool blue world

Solar System

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.

Illustration of binary shows their current and past diameters

Stellar Science

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.

White dwarf surrounded by debris disk (art)

Exoplanets

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.

an illustration of a flaring red dwarf, with a disk of gas and dust containing an earth-like exoplanet.

Exoplanets

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.

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