The Royal Observatory in Greenwich has promised “universal access to see what is one of the greatest telescopes in Britain” as it embarks on ...

Comet C/2025 A6 (Lemmon) is rapidly approaching Earth, giving skywatchers an extremely rare opportunity to spot the sparkly ...

Comet Lemmon will have its closest brush with Earth on or around Tuesday, Oct. 21. Comet SWAN should have its flyby with ...

The Milky Way ripples like a vast cosmic wave. Gaia’s precise measurements reveal a colossal motion sweeping through the galaxy’s disc, an echo of something mysterious in our galaxy’s ancient past.

Astronomers discover a low-mass dark object through gravitational lensing and multiple radiotelescopes across Earth.

"Current models are showing the [Lemmon] comet will likely peak between 3.5 and 4.5 magnitudes when it is nearest to Earth on October 21, which is dimmer than what they showed last week," Saint Louis ...

A team of astronomers have found a mysterious object in the distant universe that could be dark matter or an inactive smaller, or dwarf, galaxy.

Scientists using a global array of radio telescopes have detected the universe’s lowest-mass dark object by observing how it warped light through gravitational lensing. The invisible mass, about a ...

Astronomers have achieved the first radio image of a supermassive black hole pair, using the retired Russian RadioAstron ...

Until the end of the month, Comet SWAN can be seen in the evening sky. It will be most visible facing southwest about 90 ...

The comets, named C/2025 A6 (Lemmon) and C/2025 R2 (SWAN), are visible from the Northern Hemisphere as their orbits take them ...