For the first time, astronomers have witnessed the early stages of planet formation around a distant young star, HOPS-315, ...

The comets A6 (Lemmon) and R2 (SWAN) are visitors from the chilly fringes of our solar system, and could even be visible at ...

A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...

What makes 3I/ATLAS especially intriguing is that the comet might be three billion years older than our entire Solar System.

While Planet Y has been not yet been directly observed, unexpected inclinations found in the orbits of roughly 50 distant ...

Scientists continue to analyze data collected by both spacecraft to better understand the comet’s properties and behaviour as ...

On Sept. 21-22, a partial solar eclipse will see the moon sweep over the sun's disk, blocking its light over a swathe of the ...

Few cosmic visitors have captured the fascination of astronomers quite like the interstellar comet 3I/ATLAS. Hurtling through our solar system from the depths of interstellar space, this icy wanderer ...

The object is known as 2025 SC79, and it is 700 meters (2,297 feet) across. It goes around the Sun every 128 days, and it even crosses the orbit of Mercury. First observed on September 27, this object ...