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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

A photo of the Challenger crew, taken on January 9, 1986, during training at the Kennedy Space Center. From left to right: Christa McAuliffe (teacher in space) with astronauts Gregory

View larger. | AI combed Hubble’s archive, revealing – among hundreds of other discoveries – these 6 previously undiscovered, weird, and fascinating astrophysical objects. Of these 6, 3 are lenses

This is the iconic Ring nebula, as seen by combining 4 images from the WEAVE/LIFU instrument on the William Herschel Telescope in the Canary Islands, Spain. The never-before-seen “bar” across