Narrowing down the search is essential for gaining time on a high-powered telescope that could spot the hypothesized planet directly.
Molten Meteorites Didn’t Deliver Earth’s Water
A new study has ruled out large, once-molten meteorites called achondrites as sources of Earth’s water.
Quaoar’s Ring Defies Gravity
The dwarf planet’s ring makes astronomers question whether a long-held theory about ring and moon formation needs tweaking.
Mercury Isn’t Alone in Orbit, and Scientists Don’t Know Why
A cloud of dust traces the innermost planet’s orbital path. By all accounts, it shouldn’t be there.
NASA’s Double Asteroid Redirection Test Is a Smashing Success
The mission, focused on the Didymos-Dimorphos binary asteroid system, proved that an asteroid’s orbit can be altered by kinetic impactor technology.
Marine Science Goes to Space
Space and ocean scientists take a splash course in multidisciplinary science to chart our solar system’s ocean worlds.
Could Jupiter’s Heat Waves Help Solve a Planetary Energy Crisis?
Infrared observations reveal that Jupiter’s upper atmosphere is much warmer than models predict. The discovery may be a clue to finding missing heat sources in other giant planets.
MESSENGER Reveals a More Dynamic Mercury Surface
Image pairs indicate that 99% of the planet’s surface could be altered in the next 25 million years.
Tiny “Pancakes” Suggest Some Asteroids May Stay Active
Analysis of a meteorite that fell in Costa Rica shows that its parent body may resemble the asteroid Bennu.
11 Discoveries Awaiting Us at Solar Max
Each solar cycle might seem like the same old story, but one thing has changed significantly since the previous solar maximum–our technology.