Neil deGrasse Tyson
@StarTalk·5.4M subscribers·1.8K videos
Is There A Hidden Planet in Our Solar System?
Posted
August 11, 2026
Views
2,466
Likes
231
Comments
49
Engagement
11.35%
August 11, 2026
2,466
231
49
11.35%
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Could there be a hidden planet lurking beyond Pluto and Neptune? Neil deGrasse Tyson and comic co-host Chuck Nice tackle a wide-ranging grab bag of fan questions covering Planet 9, galaxy shapes, dark matter, the odds of getting hit by a meteorite, and more!
Learn about the Kuiper Belt and theories that there could be a ninth planet there lurking in the shadows. How long would the ninth planet's orbit be? Learn about the definition of planet and how Pluto’s demotion also resulted in the promotion of Ceres. We walk through the three criteria for planethood.
What dictates a galaxy's shape? Neil breaks down the different galaxy shapes and how they form and what they mean. Neil also touches on dwarf galaxies, lenticular galaxies, and the seven known dwarf galaxies currently orbiting our own. Could dark matter simply be ordinary matter hidden in a parallel universe hidden in the folds of spacetime? We discuss dark matter as gravity leaking in from other universes. We also explore whether there is a connection between relativity and semiconductor physics.
What are the chances of getting hit by an asteroid? Neil recounts his near-miss with a meteor on the Brooklyn Bridge during the Leonid meteor storm. Will you be able to see the ISS get de-orbitted? Plus, do black holes absorb dark matter, just like everything else?
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Science meets pop culture on StarTalk! Astrophysicist & Hayden Planetarium director Neil deGrasse Tyson, his comic co-hosts, guest celebrities & scientists discuss astronomy, physics, and everything else about life in the universe. Keep Looking Up!
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