Planets
- Planets
Hubble may have spotted a possible ‘exomoon’
The apparent moon would be the size of Neptune and orbit a distant gas-giant planet known as Kepler 1625b.
- Planets
Jupiter has 12 more moons than we knew about — and one is a weirdo
Astronomers found a dozen previously unknown moons of Jupiter. One may be a remnant of a larger moon that was all but ground to dust.
- Planets
New Horizons data reveal first global maps of Pluto and Charon
Astronomers have made new charts of Pluto and its moon Charon. They show high peaks, deep depressions and strange ridges.
- Microbes
Finding living Martians just got a bit more believable
What might a real Martian look like? Scientists have a better idea after identifying a buried liquid lake on the Red Planet.
- Physics
Mars appears to have a lake of liquid water
A 15-year-old Mars orbiter has spotted signs of a salty lake beneath the Red Planet’s southern polar ice sheets.
- Planets
Thick atmosphere boosts how fast Venus spins
The thick atmosphere on Venus can change by a few minutes every day how long it takes the planet to rotate.
- Planets
Pluto’s heart has dunes of methane ice
Pluto’s heart-shaped plains are striped with sand dunes. The sand is made of methane ice.
- Chemistry
Diamonds and more suggest unusual origins for asteroids
Inside a meteorite, scientists found sulfur and iron wrapped in tiny diamonds. Those gems hint the rock formed inside a long-lost planet.
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- Chemistry
Asteroids may have delivered water to early Earth
Scientists shot mineral pellets at a simulated planet. It showed an impact wouldn’t have boiled off all of an asteroid’s water.
- Planets
Flared! How a planetary ‘neighbor’ may have been fried
Hoping for life on the planet our stellar neighbor Proxima Centauri? Don’t hold your breath. Its star may have sterilized its Earthlike exoplanet.
- Planets
Here’s why Venus is so unwelcoming
Venus is hard to study. Scientists also find it hard to get money to send spacecraft there. But researchers have ideas about how to tackle both challenges.
