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Strange ‘spider’ on Europa hints at water lurking below

Researchers say that a huge 'spider' on Europa likely formed when a crater-creating impact caused briny water to spill out onto the surface.

Paul Scott Anderson

December 27, 2025

No ocean on Titan? New research reveals slushy ice world

Scientists thought there was a global ocean on Titan beneath its icy surface. But a new study says the moon's interior may be more icy and slushy instead.

Paul Scott Anderson

December 26, 2025

Earth’s radio bubble marks how far our signals have traveled

Earth's radio bubble is the extent to which our radio broadcasts have traveled. The 1st intentional radio broadcast was on December 24, 1906. Where is it now?

Kelly Kizer Whitt

December 24, 2025

Apollo 8 Earthrise photo Christmas Eve 1968

Astronaut William Anders took this iconic photo of Earthrise on the 4th orbit of the moon aboard Apollo 8 on December 24, 1968.

Deborah Byrd

Kelly Kizer Whitt

December 24, 2025

Solar wind ‘U-turn’ spotted by Parker Solar Probe

NASA's Parker Solar Probe images have revealed solar material blasted out from the sun returning to our star, rather than escaping as solar wind.

EarthSky Voices

December 23, 2025

See the top 10 stories of 2025 from EarthSky

Here are the top 10 stories of 2025. An interstellar comet visited us, cameras captured a meteorite strike and an earthquake, and much more!

Kelly Kizer Whitt

December 23, 2025

Earth’s atmosphere sheds onto the moon!

Researchers found Earth's atmosphere sheds onto the lunar surface thanks to the solar wind stripping particles, which then spiral along magnetic field lines.

Kelly Kizer Whitt

December 21, 2025