Planetary Science

Solar-powered balloons detected strange, ultra-low-frequency rumblings in Earth’s stratosphere that, so far, scientists can’t identify

Delays and budgetary overruns are causing many to worry that NASA’s ambitious planetary science program is at a breaking point

New results from a U.A.E. orbiter suggest Mars’s moons may be pieces of the planet. A Japanese mission will tell us for sure

Vast quantities of liquid water may exist on moons of Jupiter, Saturn and Neptune, making life possible there, too

If Martian microbes were like those in this Earth lagoon, they could have survived the Red Planet’s primordial desiccation

A gas giant planet’s youthful glow could explain major differences between its four largest satellites

The ambitious Jupiter moon mission JUICE has begun its long journey to the Jovian system

The imagery offers a rare view of the ice giant’s ring system, bright moons and dynamic atmosphere

A half-kilogram’s worth of samples gathered by NASA’s Perseverance rover for eventual return to Earth holds weighty implications for life on Mars

Multiple obstacles might make it hard for NASA to turn its dream of ice giant exploration into a reality any time soon

The asteroid Didymos witnessed its companion get slammed by NASA’s DART spacecraft, and Didymos itself may have interesting activity

TRAPPIST-1b is probably an airless rock, but the same may not be true for its six Earth-sized siblings