Does Planet Nine Really Exist?
42: The Answer to Almost Everything · Season 1 · Episode 185
In 2006, the International Astronomical Union voted to demote Pluto to a "dwarf planet," reducing the official number of planets in the solar system to eight. According to Mike Brown, the astronomer behind Pluto's declassification, there is, however, a wealth of evidence suggesting the existence of a ninth planet.
Episode Details
Air date, runtime, timezone, and episode position.
Season
1
Episode
185
Air Date
11/Jan/2026
Air Time
—
Runtime
30 min
Overview
Episode summary.
In 2006, the International Astronomical Union voted to demote Pluto to a "dwarf planet," reducing the official number of planets in the solar system to eight. According to Mike Brown, the astronomer behind Pluto's declassification, there is, however, a wealth of evidence suggesting the existence of a ninth planet.
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