The Atacama Cosmology Telescope in Chile not only confirmed one of the greatest mysteries in the universe—it also ruled out ...

NASA's Nancy Grace Roman Space Telescope is now fully assembled and ready to begin launch preparations this summer.

Fleets of satellites interfere with snapshots taken by Earth-bound observatories. But a new study suggests these orbiters ...

The fifth day of the 18th annual Space Telescope Advent Calendar features a close view of a distant and colorful spiral ...

According to NASA, Hubble took its latest photo of 3I/ATLAS on November 30 using its Wide Field Camera 3 instrument. At that ...

Our planet’s magnetosphere has seen dramatic shifts across its history—even total reversals—but this recent wrinkle doesn’t ...

A new NASA-led study found that the increasing number of satellites in low-Earth orbit could ruin up to 96% of images from ...

A pending orbital traffic jam has expert stargazers worried that their otherworldly views — including of potential inbound ...

Both of Friday’s Astronomical Unit lectures are related to celestial phenomena not discernible to human senses. David ...

“All the Fermi Paradox tells you is that civilizations are rare. It doesn’t tell you why they’re rare,” says Ian Crawford, a ...

A spectacular new view of two dwarf galaxies caught in the middle of a cosmic collision reveals a glowing gas bridge, streams ...

"It means cleaning house, narrowing the viable paths forward, and no longer spending energy on what are evidently dead ends." ...