Previous hints of a methane atmosphere on TRAPPIST-1e might not be accurate, a new paper suggests. But the tantalizing exoplanet could still have an atmosphere.
In an experiment on the outside of the International Space Station, a species of moss survived in space for 9 months. And it could have lasted much longer.
Thin, repeating sedimentary layers examined by the Curiosity rover suggest that a big, lost moon of Mars created tides in the ancient lake of Gale crater.
NASA's Perseverance rover has detected lightning on Mars 55 times. It heard the small electrical discharges with its microphone in dust storms and dust devils.
Planets and stars in the night sky are made of normal matter. Yet only 9% of the universe's normal matter is in objects such as these. Where is the rest of it?