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PBS News Hour

We can't see this possible 9th planet, but we feel it

Most of us grew up thinking there were nine planets in the solar system, but that changed when Pluto got downgraded in 2006. Now there's news that there might be a ninth planet after all. Researchers have found evidence of a planet with a mass 10 times that of Earth. Jeffrey Brown talks to Mike Brown of the California Institute of Technology.
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September 5, 2025 - PBS News Hour full episode
57:46
Season 2025 Episode 248
September 5, 2025 - PBS News Hour full episode
September 5, 2025 - PBS News Hour full episode
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Season 2025 Episode 247
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Season 2025 Episode 246
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Season 2025 Episode 245
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September 2, 2025 - PBS News Hour full episode
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Season 2025 Episode 244
September 1, 2025 - PBS News Hour full episode
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Season 2025 Episode 243
August 31, 2025 - PBS News Weekend full episode
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Season 2025 Episode 242
August 30, 2025 - PBS News Weekend full episode
August 30, 2025 - PBS News Weekend full episode
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Season 2025 Episode 241
August 29, 2025 - PBS News Hour full episode
August 29, 2025 - PBS News Hour full episode
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Season 2025 Episode 240
August 28, 2025 - PBS News Hour full episode
August 28, 2025 - PBS News Hour full episode
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Season 2025 Episode 239
August 27, 2025 - PBS News Hour full episode
August 27, 2025 - PBS News Hour full episode
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Season 2025 Episode 238
August 26, 2025 - PBS News Hour full episode
August 26, 2025 - PBS News Hour full episode
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Season 2025 Episode 237
August 25, 2025 - PBS News Hour full episode
August 25, 2025 - PBS News Hour full episode
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