"There is likely a threshold on the size requirements of rocky planets to retain enough water to enable habitability and plate tectonics..."
Superflares may not cause as much damage to exoplanets, and their habitability, as astronomers once believed, a new study shows.
Tectonic motion in the form of crustal blocks that have jostled against each other suggests Venus may still be geologically active, researchers say.
New research shows that many stars in the Milky Way galaxy may have Earth-like planets in their orbit. The finding is somewhat at odds with previous work.
"This system is so exciting because we can witness the formation of a planet. This is the youngest bona fide planet Hubble has ever directly imaged."
Super-Earths are not leftovers of mini-Neptunes, after all, according to a new study that challenges our understanding of planetary formation.
Putting carbon under the highest pressure ever recorded in a laboratory has led to a model of the insides of exoplanets, researchers say.
The exoplanet WASP-107b is around the size of Jupiter, but has a mass 10 times smaller, researchers find. That upends ideas about gas giant planets.
An exoplanet 336 light years from Earth has a resemblance to the hypothetical "Planet Nine" of our own solar system, researchers say.
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