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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

View larger. | Quantum computers and exoplanets: This is the Webb space telescope’s view of the 4 young, colorful, giant exoplanets in the HR 8799 system, 130 light-years away. A

View larger. | Artist’s concept of the view over Valles Marineris, aka the Grand Canyon of Mars. Researchers have found new evidence for an ancient Mars ocean within the canyon.

This new James Webb Space Telescope image shows the galaxy cluster MACS J1149.5+2223, or MACS J1149 for short. It’s located about 5 billion light-years away in the constellation Leo the

Voyager 2 met Uranus, our sun’s 7th planet, on January 24, 1986. Afterwards, as Voyager sped ever-outward from our sun, it obtained this backlit image. Image via NASA/JPL. EarthSky’s 2026

View larger. | Artist’s concept of a large disk of debris, surrounded by a thick cloud of dust and gas, passing in front of a star. Astronomers said there’s a