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Artist’s concept of the fast-spinning asteroid 2025 MN45. It’s the fastest-rotating asteroid with a diameter greater than 500 meters (0.3 miles) that scientists have yet found. It’s 710 meters (0.44

Artist’s impression of a galaxy cluster forming in the early universe. These are active galaxies, with radio jets spewing abundant hot gas into the space between the cluster members. This

The asteroid 2005 UK1 will make a close – but safe – pass by Earth on January 12, 2026. Though it is considered a potentially hazardous asteroid, it will not

This artist’s concept shows Betelgeuse’s companion star orbiting the red supergiant. The companion, which is orbiting clockwise from this point of view, generates a dense wake of gas that expands

View larger. | Artist’s concept of a rogue planet in the process of microlensing a more distant star. The foreground object bends the light from the distant star (peach-colored arcs),

This image shows the location of Cloud-9, which is 14 million light-years from Earth. The diffuse magenta is radio data from the ground-based Very Large Array (VLA), showing the presence

View larger. | In recent decades, we’ve come to understand most large galaxies as having central supermassive black holes. Our own galaxy, the Milky Way, has one. And the similarly

View larger. | Artist’s concept of scorching hot TOI-561 b and its sunlike star. New observations by NASA’s James Webb Space Telescope show there is a dense atmosphere on lava

In 2024, astronomers discovered the brightest Luminous Fast Blue Optical Transient (LFBOT) ever observed. LFBOTs are extremely bright flashes of blue light that shine for brief periods before fading away.

View larger. | Artist’s depiction of the interior of Uranus as either an ice giant (left) or rock giant (right). A new study suggests both Uranus and Neptune could be