382 results
- Astronomy
Fewer big rogue planets roam the galaxy, recount shows
Jupiter-mass planets without parent solar systems are less common than astronomers thought, a new study suggests.
- Astronomy
Big exoplanet may be surrounded by helium
Warm Neptune-sized exoplanet might have atmospheres filled with helium.
- Astronomy
Largest rocky world found
A planet roughly half the size of Neptune might be 100 percent rock, making it the largest known rocky world.
- Earth
Where the young hot Earth cached its gold
A simulation of the infant Earth provides a new view of how the iron-loving precious metals ended up buried deep in the planet’s core.
- Astronomy
Astronomical milestones of 2015
The New Horizons mission to Pluto was the No. 1 science story of the year. Here some other notable space missions.
- Astronomy
Mars-sized exoplanet is smallest to have its mass measured
The smallest exoplanet to be weighed is a hot, rocky cousin of the Red Planet.
- Astronomy
Signs of planet detected around sun’s nearest neighbor star
A planet roughly the size of Earth orbits within the habitable zone of Proxima Centauri, the closest star to the sun.
- Planetary Science
How alien can a planet be and still support life?
Geoscientists imagine the unearthly mechanisms that could keep alien planets habitable.
- Astronomy
Erupting volcanoes may cause exoplanet’s temperature extremes
Temperatures fluctuate wildly on a nearby exoplanet, and volcanoes might be the culprit.
- Astronomy
Giant rings encircle young exoplanet
Stretching 90 million kilometers from their center, 37 stripes of dust around exoplanet were probably crafted by moons.
- Earth
General relativity has readers feeling upside down
Readers respond to the June 25, 2016, issue of Science News with questions on Earth's age, moaning whales, plate tectonics and more.
- Astronomy
White dwarf upsets planetary system, consumes evidence
Rocky planets are disintegrating around a white dwarf, the core of a dead star.
