382 results
- Astronomy
Celebrating 25 years of the Hubble Space Telescope
The Hubble Space Telescope has served for more than two decades as the sharpest eyes ever to peer into the universe.
- Astronomy
Earth-mass planet resembles a mini-Neptune
KOI-314c, an exoplanet 200 light-years away, is about 60 percent larger than Earth but made mostly of gas.
- Astronomy
Super-Earths may form in two ways
Rocky planets much heavier than Earth may form in different ways.
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- Astronomy
Planet collisions may have rearranged crowded solar systems
Solar systems discovered by Kepler with just one or two worlds may be remnants of planet families that were once far more crowded.
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- Astronomy
Neptune-like worlds could become habitable
Mini-Neptunes can drift toward their stars and lose their atmospheres, leaving behind ice-rich rocky cores that can become watery worlds.
- Astronomy
Oldest solar system unearthed by Kepler
Five rocky planets orbit the 11.2-billion-year-old star Kepler 444, suggesting that Earth-sized worlds formed in the early universe.
- Astronomy
An Earth-sized hell circles faraway star
Kepler-78b, an Earth-sized, extremely hot exoplanet made of rock and iron, is the smallest with known diameter and mass.
- Astronomy
Large rocky planets excel at ocean building
Rocky planets a few times as massive as Earth may build deeper oceans – and sustain them for longer – than smaller worlds.
- Astronomy
Year in Review: Death of a planet hunter
The Kepler space telescope finishes a brilliant career.
