Revisiting how Earth looks from space could offer scientists clues for finding alien life on distant worlds.
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Oceans' worth of water may remain buried in the crust of Mars, and not lost to space as previously long thought, a new study finds.
Scientists think they've spied an alien world that lost its atmosphere — then conjured itself a new one.
We keep getting reminders that the Milky Way's planetary diversity dwarfs what we see in our own solar system.
Rare chemical makeup in a meteorite that fell to Earth in 2020 hints at its unusual origins: from a pre-planetary body dating to our solar system's beginnings.
Earth's last magnetic flip 42,000 years brought environmental change and extinctions. Could that happen now?
Does the solar system really have a big, dark ninth planet drifting somewhere far beyond the orbit of Neptune? A new paper argues that Planet 9 is a statistical mirage.
Data from one of Cassini's last flybys of Titan probed the depths of Kraken Mare to better understand the moon's alien chemistry.
The haze shrouding Pluto might be made up of ice crystals possessing cyanide hearts, a new study finds.
Earth is the only planet traveling within its nearly circular orbit around the sun. But what if Earth shared its orbit with another planet?
Scientists think they have identified a lava world so dramatic that it might boast a thin regional atmosphere of vaporized rock where it is closest to its star.
Astronomers are vetting a technique that could aid the hunt for Planet Nine, which some researchers think lurks undiscovered in the far outer system, way beyond Pluto's orbit.
Scientists have found an alien world that orbits its host star every 3.14 Earth days, a close approximation of the famous mathematical constant pi.
Researchers are investigating an alien version of water inside the strange, icy interiors of Uranus and Neptune.
New imagery pinpoints the spot where a baby planet is forming around the young star AB Aurigae, which lies 520 light-years from Earth.
Even if you're stuck indoors during the pandemic, you can still catch May's full moon, also known as the flower moon.