Скачать или смотреть Planet X: The Missing World We Haven't Found (Yet?)

Hi Spacecats, I'm Dr Maggie Lieu and welcome to my channel, where you can find all things space, astronomy and physics! Is there a massive, undiscovered planet lurking in the shadowy outer reaches of our solar system? In this week's video I'll be covering the evidence for the missing 9th planet and some more recent developments.

What do you think? Is Planet Nine out there? Let us know in the comments below!

Links:
Planet 9 detection Phan et al 2025 https://arxiv.org/pdf/2504.17288
New dwarf planet discovered, cheng et al 2025. https://arxiv.org/abs/2505.15806

Media credits:
solar system: ESA/Kornmesser
Asteroid: ESO
clusters: Nagualdesign
kuiper belt: ESA
Kuiper objects: Renerpho
mini neptune:ESA/Kornmesser
LSST/Rubin Observatory: NSF/Aura


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