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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?
Astronomers are tracking strange orbital patterns in the outer Solar System that suggest a massive unseen planet may exist ...
A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...
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'
Astronomers have been actively hunting for a ninth planet in the solar system for almost a decade. But a new study has ...
Material around Chiron, a small icy world in the far reaches of the solar system, may be taking shape into a ring system of ...
Our solar system is a smashing success. A new study suggests that from its earliest period—even before the last of its nebular gas had been consumed—Earth's solar system and its planets looked more ...
What's special about Chiron's rings is that they're still forming; this marks the first time astronomers have ever seen a ...
Isaac Arthur on MSN
How a Newly Found Dwarf Planet Could Rewrite the Solar System
Astronomers have discovered a distant dwarf planet orbiting beyond Neptune — a frozen world so far from the Sun that it ...
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