This moss survived in space for 9 months

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.

Mysterious 3200 Phaethon is the Geminids’ parent object

3200 Phaethon is the weird comet-like asteroid that spawns the Geminid meteor shower. New research reveals more answers ... and questions.

Long-lasting gamma-ray burst is a unique puzzle

We now have more insight on the longest gamma-ray burst yet. The burst lasted at least 7 hours, nearly double that of the previous record.

There might be an ocean on exoplanet TOI-270 d

Is there an ocean on exoplanet TOI-270 d? A new study said this sub-Neptune exoplanet might be a water world with either a global or nightside ocean.

Did a lost moon of Mars create tides in an ancient lake?

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.

Lightning on Mars? Electric sparks in dust devils confirmed

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.

Where’s the normal matter in our universe?

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?

What time is it on Mars? The 1st precise answer

What time is it on Mars? The time difference between Mars and Earth is a complicated puzzle. But it's necessary to solve for future explorations.

Proximity to a supermassive black hole doesn’t spell doom

Scientists found that stars in the "S-cluster," a group of young, high-velocity stars orbiting our galaxy's central supermassive black hole, have stable orbits.

Mercury’s sodium tail is now appearing in special filters

On December 3, 2025, Steven Bellavia imaged Mercury's sodium tail flowing away from the sun. See the image here and read more about Mercury's tail.