Live Science on MSN
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?
Live Science on MSN
'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 ...
When you look at the solar system, you might notice that the planets' orbits are tilted, and oddities in the protoplanetary ...
Space.com on MSNOpinion
Strange 'puffy' alien world breaks every rule for how planets should behave
A low-density, puffy planet orbiting relatively far from a young star in a nearly perpendicular orbit. What's going on?
The Sun's formation caused temperature differences in the surrounding disk of gas and dust. Inner, hotter regions formed rocky planets from less volatile elements. Outer, colder regions allowed ...
Modern Engineering Marvels on MSN
Approaching Rogue Planet Sparks Debate Over Solar System Stability
Could a lonely planet wander aimlessly through the restless galaxy change the subtle dance of gravity within our solar system ...
A recent study by Princeton University astronomers suggests the possible existence of a previously undetected planet in our ...
One of the most notable properties of the giant planets in our solar system—Jupiter, Saturn, Uranus and Neptune—are the ...
The James Webb Telescope captures the beginning of planetary formation around the young star HOPS-315 for the first time.
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