A newly discovered dwarf planet could hold the key to unlocking the mysteries of our solar system’s outer reaches — but what ...

Astronomers have discovered a distant dwarf planet orbiting beyond Neptune — a frozen world so far from the Sun that it ...

"It shows that Makemake is not an inactive remnant of the outer solar system, but a dynamic body where methane ice is still ...

It will be a while before you can see it for yourself, however. Halley’s comet was last visible from Earth in 1986, meaning ...

The simulation of the Solar System that came the closest to the observation was the presence of a small planet, between the ...

Astronomers are investigating a potential hidden planet, dubbed Planet Y, far beyond Neptune. Its gravitational pull is ...

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

A new study has proposed the existence of Planet Y, an alternative Planet Nine candidate that is smaller and closer to Earth ...

The detection of the molecule phosphine in a brown dwarf’s atmosphere may help astronomers in their search for life elsewhere in the Milky Way.

When astronomers pointed the James Webb Space Telescope (JWST) at a faint object orbiting a distant star system, they weren’t ...

The Copernican Principle, named in honor of Nicolaus Copernicus (who proposed the heliocentric model of the universe), states ...

The methane gas may constitute a rarefied atmosphere, or it may come from erupting plumes on Makemake’s surface.