New planet is one of the best ever hopes for seeing alien life, scientists say - Less than 20 light years away, we could soon ...

A chemical "anomaly" revealed through an analysis of meteorites may have led to finding the first existing evidence of "proto ...

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

There are a couple of ways that scientists can date planets, so which planets formed first in our solar system?

Geoengineering startup Stardust Solutions says it has raised $60 million to lay the groundwork for tech that could be used to ...

The universe has quasi-moons, mini-moon, and moonlets, but no official definition of what counts as a moon.

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

New research from Rice University suggests that the giant planet Jupiter reshaped the early solar system in dramatic ways, ...

We teamed up with the makers of Frozen Planet II for a science Live Lesson exploring the coldest places on Earth and the ...

Earth has breached a critical boundary for ocean acidification, with potentially grim effects for ocean ecosystems and human ...

In “Citizen Science in Astronomy (Part 7),” SETI Institute astronomers Dr. Franck Marchis and Dr. Lauren Sgro highlight two rare and compelling discoveries and the crucial role of citizen scientists ...

A possible cousin of Pluto seems to be circling the far reaches of the solar system. The dwarf planet candidate 2017 OF201 travels in a superwide orbit, with the sun relatively near one end of its ...