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Is the moon geologically dead? Maybe not, says new evidence
Newly discovered lunar ridges have provided the first evidence of recent geological activity on the far side of the moon.
February 2, 2025
Can you ID these cities at night from space? Take the quiz!
Take this fun quiz to see how many cities at night you can identify from images astronauts took aboard the International Space Station.
February 2, 2025
Deep-sky photos for January 2025: Editor’s picks
Enjoy this gallery of deep-sky photos for January 2025 from our EarthSky community. If you have a great photo to share, send it in. We love to see them!
February 1, 2025
Sun activity archive for February 2025
Sun activity archive for February 2025. A daily record of flaring, big filaments and prominences, and other sorts of activity, on our local star.
February 1, 2025
Asteroid Bennu reveals conditions for life, but with twist
Samples from asteroid Bennu brought back to Earth in 2023 contain molecular building blocks for life, evidence of ancient salty water, and something mysterious.
January 31, 2025
Powerful cosmic explosion could be a new class of event
A powerful cosmic explosion - named EP240408a - might be a jetted tidal disruption, or perhaps it's something completely new! More here.
January 31, 2025
The mass of a star is determined from binary star systems
Binary stars - a star system consisting of two stars - are extremely useful. They give all the information needed to measure mass of a star. Here is how.
January 31, 2025
The ecliptic is the path of the sun
The ecliptic is an imaginary line that marks the path of the sun. You can also find the planets and moon near this line, tracing the plane of our solar system.
January 31, 2025
Using exploding white dwarfs to measure the universe
The Rubin Observatory will find millions of exploding white dwarfs, or Type Ia supernovae. Astronomers can use them to measure the universe and dark energy.
January 30, 2025
Sirius is a future southern Pole Star
Wait, what? It's true. The sky's brightest star, Sirius aka the Dog Star, will come to within 1.6 degrees of the south celestial pole in the year 66270.
January 30, 2025
