This cosmic question mark, seen in 2024, is courtesy of galaxy cluster MACS-J0417.5-1154, which is so massive that it is ...

Looking for a sky event this week? Check out our full Sky This Week column. January 26: Saturn's moons in motion The gibbous ...

Some solar flares can result in coronal mass ejections (CMEs) – huge plumes of plasma blown off the sun's corona and into deep space. If their trajectory away from the sun inter ...

The sharpest dark matter map ever reveals the invisible cosmic scaffolding that built galaxies, stars, and ultimately life itself. Scientists have produced the most detailed map ever created of dark ...

Scientists have created the highest resolution map of the dark matter that threads through the universe—showing its influence ...

Astronomers have long searched for clues that a hidden companion star sits out of view near the red supergiant ...

Helping young people tap into their excitement about the night sky helps them build confidence and opens career pathways they may not have considered before.

A distant Sun-like star suddenly went dark for months, stunning astronomers who quickly realized something massive was ...

Using powerful X-rays, researchers at SLAC are trying to recover erased traces of a 2,000-year-old star catalog that could ...

Sky This Week is brought to you in part by Celestron. Friday3Pluto reaches conjunction with the Sun at 5 A.M. EST. Also this ...

New Hubble observations explain how blue straggler stars form, showing that binary systems in low-density clusters play a key role ...

SpectrUM recently gained a $250,000 grant from NASA to place telescopes in the fall of this year in libraries across the state of Montana.