Lost tool bag from spacewalk caught on video

NASA astronauts accidentally lost a tool bag during a spacewalk on November 2. Now, observers on the ground have caught the tool bag on video. See it here.

Sky trio for you, Southern Hemisphere friends

Here's a chart showing a delicate sky trio - as seen from Australia and New Zealand - on the evening of November 15, 2023. Look soon after sunset!

Are 2 huge blobs inside Earth due to an ancient impact?

A new study from an international team of researchers says that 2 huge blobs inside Earth came from the collision with the planet Theia billions of years ago.

Jupiter’s moon Ganymede is coated in salts and organics

NASA's Juno spacecraft has found salts and organics on Jupiter's largest moon, Ganymede. They suggest that watery brines came up to the surface from deep below.

SpaceX CRS-29 Dragon has docked with ISS

SpaceX launched the CRS-29 mission to the ISS from Florida at 1:28 UTC on November 10, 2023. The cargo is expected to arrive at the ISS on November 11.

Iceland braces for eruption of Fagradalsfjall volcano

Iceland declared a state of emergency on November 10, 2023, near Fagradalsfjall volcano, dormant for 800 years until 2021. Now it looks poised to erupt again.

Photos of Venus and the moon November 9, 2023

EarthSky's global community shared fabulous photos of Venus and the moon from their close approach and occultation on November 9, 2023.

What are red giants? Our sun will become one!

What are red giants? Most main-sequence stars, like our sun, will become one. Red giants swell to such a large size they can swallow their inner planets.

Rover spies rock features on Mars with odd circular shapes

NASA's Perseverance rover recently found odd circular rock features on Mars, similar to ones made by microbes on Earth in lakes. Evidence of life or geology?

1st science images from Euclid! Dr. Becky explains why we love them

See the first images from Euclid, a dazzling assortment of galaxies, clusters and nebulae that will help us understand dark matter and dark energy.