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

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

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

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

Some habitable worlds orbiting dead stars could be kept alive for aeons thanks to a quirk of Einstein’s theory of gravity ...

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

Earth Science Week 2025, an annual worldwide celebration of the geosciences led by the American Geosciences Institute (AGI), ...

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 ...

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 ...

Explore the fascinating worlds of Planetary Science and Geophysics, uncovering mysteries of the cosmos and Earth's processes.