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

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

Astronomers have observed a massive growth rate in a free-floating rogue planet that’s gobbling up gas and dust at a record ...

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

Billionaire and Microsoft co-founder Bill Gates argued that science and innovation are the keys to saving the planet ...

The growth spurt hints that the free-floating object evolves like a star, providing clues about rogue planets’ mysterious origins.

Scientists may have discovered a dwarf planet far beyond Neptune — an unearthing that may disprove a longstanding theory about the possibility of a giant ninth planet. The dwarf planet's existence ...

Astronomers have uncovered a runaway feeding frenzy in a rogue planet drifting freely through space, devouring six billion ...

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 ...

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

On Monday (Oct. 6), the nonprofit Planetary Society held a "day of action" to urge Congress to restore NASA's science funding ...

Nearly 300 space advocates from across the United States converged on Capitol Hill on Oct. 6 for a “Save NASA Science” Day of ...