Planetary Science
- Planetary Science
Signs of giant comet impacts found in cores
An uptick in ammonium may be evidence of a 50-billion-ton strike at the end of the ice age.
- Earth
Irrigation draining California groundwater at ‘unsustainable’ pace
The GRACE satellites have tracked water movement from the Central Valley since 2003.
- Planetary Science
Pluto’s cloud components verified
Newly analyzed observations suggest that particles are tiny spherules of frozen nitrogen and carbon monoxide.
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- Planetary Science
Mercury, As Never Seen Before: MESSENGER visits innermost planet
The first spacecraft to visit Mercury in 33 years imaged 25 percent of the crater-pocked surface that had never before been seen close-up.
- Ecosystems
Windy with a chance of weevils
Scientists have traced the reappearance of cotton pests in west-central Texas to a tropical storm.
- Planetary Science
Award named for late Science News writer
Jonathan Eberhart's name lives on in a new planetary-sciences award.
- Space
Water on the moon: How much?
Ron Cowen reports from the annual meeting of the American Astronomical Society’s Division for Planetary Sciences.
- Health & Medicine
Measuring citations: Calculations can vary widely
Depending on how citation tallies will be used, it may pay to cherry pick the appropriate counting house.
- Astronomy
Rock solid planet
Researchers have found the first compelling evidence for a rocky planet beyond the solar system.
- Earth
Atmospheric rollercoaster followed Great Oxidation Event
Analyses of chromium isotopes in banded iron formations suggest oxygen levels fell for a period after the Great Oxidation Event.
- Planetary Science
Celestial population boom
Large meteoroids are probably more common than telescopic surveys suggest, new analyses find.
