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View at EarthSky Community Photos. | Greg Johnson captured this image on March 22, 2025, from Washington and wrote: “Fireball captured on my SkunkBayWeather “Night” webcam.” Thank you, Greg! Spring

AI image of our Milky Way galaxy. The innermost stars in the galaxy are depicted as moving at near relativistic speeds (at a significant fraction of the speed of light) around a dense

Artist’s concept of water vapor plumes erupting onto the surface of Saturn’s moon Enceladus. In the background we see another moon, Titan, lit as a crescent, with the distant sun

View larger. | Artist’s concept of HD 137010 b. This candidate exoplanet is rocky and just slightly larger than Earth, with a similar orbit to Earth’s. But it might be

Mercury, as seen by NASA’s MESSENGER orbiter. Through a new analysis of MESSENGER’s images, researchers have found surprising geological activity on our solar system’s innermost planet. Image via NASA. EarthSky’s

View larger. | Artist’s concept of a massive exomoon orbiting a gas giant exoplanet. A team of astronomers says it might have detected a huge exomoon orbiting the gas giant

ESA’s Proba-3 spacecraft captured this image of our star. The sun’s dazzling body is blocked by 1 of the 2 satellites making up Proba-3, leaving the other satellite free to

The smooth, rounded glow is an elliptical galaxy made of roughly a trillion stars: the giant galaxy M87. The blue stream is its black hole jet — a relativistic outflow

Is there life in Europa’s ocean? A new study suggests that chemical nutrients in the moon’s icy crust could sink down into the subsurface ocean, providing a source of nutrients