The provisionally named S/2025 U1 is so small it had gone unnoticed by probes and telescopes for the past 40 years.

Two colliding galaxies have been found to be reorganizing their dwarf satellites, potentially solving a major conundrum ...

Though the days are fast ticking by, that success is far from assured. DART is the first-ever test of what NASA calls a ...

Comet 3I/ATLAS is captured in this image by the Gemini North telescope. The incredible sensitivity of Gemini North's ...

Researchers at the University of Colorado Boulder are helping to lead planning efforts for NASA’s next major space telescope ...

What else is hiding in the brightness of the outer planets? That was made more pressing by the James Webb Space Telescope’s Near-Infrared Camera catching a dim, six-mile-wide moon around Uranus a ...

Dark energy, the mysterious force driving the accelerated expansion of the universe, has puzzled scientists since its ...

By using Hubble’s advanced instruments, scientists plan to map 19 nearby galaxies. They aim to identify more than 50,000 nebulae in total.

Outer space has emerged as the world's next battlefield, demonstrated by recent cyberattacks on satellites blamed on Russia.

SpaceX plans to launch a reconnaissance satellite into orbit known as NAOS from California for organizations like NATO.

SpaceX will launch a government reconnaissance satellite from California, but the daytime launch window may complicate viewing plans in Arizona.