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Rogue planet discovery reignites solar system stability debate

Astronomers are abuzz with the discovery of a rogue planet, 2MASS J05325346+0919037, which is set to pass within 0.05 ...

The Government Shutdown Is Fueling More Wild Theories About Mysterious Object In Solar System

Using JWST and ALMA data, astronomers have spotted a superlong and narrow 'galactic contrail,' possibly produced by a black ...

Massive comet zooming through solar system could be alien technology, Harvard astrophysicist says

Harvard researcher Avi Loeb says comet 3I/ATLAS weighs 33 billion tons and spans 3.1 miles, making it far larger than ...
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'Planet Y' theory hints at hidden Earth-size world lurking in the solar system — and it could be much closer to us than 'Planet Nine'

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

NASA Can Open Up the Solar System With Nuclear Propulsion

Viewed from orbit, Jackass Flats — situated in southern Nevada about 65 miles northwest of Las Vegas — could easily be ...

Planet Y? Astronomers find fresh clues of hidden world 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 ...
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Which planets are the youngest and oldest in our solar system?

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