What is Planet Nine, and where is it? The question has fascinated astronomers for years. Scientists believe a massive undiscovered planet may exist in the outer Solar System. Although no telescope has ...

NASA’s TESS mission discovered two unusually puffy planets, one larger than Jupiter and one about the same size, but both are ...

Hubble Space Telescope image of 3I/ATLAS. (NASA, ESA, David Jewitt/UCLA; Image Processing: Joseph DePasquale/STScI) All signs ...

The names of the days often feel so familiar that they pass unnoticed. They appear on calendars, meeting schedules and phone screens without inviting much thought. Yet hidden inside those ordinary ...

The pleasing environs had put Roelker, who was drinking rye whiskey procured from a local distillery called Catoctin Creek, ...

Earliest quasar variability ever detected shows a 630-million-solar-mass black hole at cosmic dawn already had an orderly ...

Could the supermassive black hole at the centre of the Milky Way Galaxy be dark matter instead?

Newly released images of the asteroid Donaldjohanson captured by NASA's Lucy spacecraft reveal age, rotation, and composition ...

At the right point of the orbit and stellar cycle, the star’s chromosphere brightens.

One year ago, on July 1 2025, astronomers discovered a fascinating new object moving through the Solar System. Detected by ...

While life on Mars (and Venus) has long been an obsession for those wondering if we're alone, there are other places in our ...

The outer solar system once seemed like a quiet backwater. But a glut of tiny, strange moons with unruly orbits are coming into view, revealing hints of a surprising past – and the origin of Saturn's ...