‘Bouncing comets’ could spread the seeds of life

Researchers in the U.K. said in a new study that 'bouncing comets' in some planetary systems could deliver prebiotic molecules needed for life to young planets.

Eyewitnesses saw fiery Starship reentry over Caribbean

After Starship launched on November 18, 2023, the spaceship self-destructed. Witnesses around Puerto Rico saw what they believe to be its fiery reentry.

Salt glaciers on Mercury could harbor habitable niches

Researchers have found evidence of glaciers on Mercury. They are composed of salt, not ice, and could potentially create habitable niches for microorganisms.

Achernar is the End of the River of Eridanus constellation

Achernar is the 9th brightest star and flattest star known. It marks the end of Eridanus the River. Here's why much of Earth never sees it ... and how you can.

Are Eris and Pluto different on the inside?

Dwarf planets Eris and Pluto are outwardly similar. But a new study suggests they are quite different on the inside, and that they evolved differenly.

Al Risha binds the Fishes of Pisces together

The star Al Risha in the constellation Pisces isn't bright. But it's at the tip of the graceful V in the constellation Pisces and it's very noticeable.

Are some modern earthquakes aftershocks from the 1800s?

Scientists examined modern-day earthquakes in 3 regions of North America and found that some are aftershocks from the 1800s.

Mars spacecraft fall silent as red planet goes behind sun

Mars passed behind the sun from Earth yesterday, November 18, 2023. Between now and early December, data exchange between Earth and Mars spacecraft is limited.

Wow! A rare waterspout over Sun Moon Lake, Taiwan

An EarthSky community member caught this rare waterspout over Sun Moon Lake on November 16, 2023. What a catch! Thank you, Bob!

The universe is expanding faster than theory predicts

The universe is expanding faster than theory predicts. Scientists are trying to come up with new models to explain what the standard model of cosmology can't.