The Evidence for Planet Nine’s Existence
Season 46
About the Episode
Two astronomers argue that the farthest objects in the Kuiper Belt are being pushed and pulled by the gravity of Planet Nine, a giant planet orbiting over 10 times farther from the Sun than Neptune. If they find it, it’ll be the first real expansion of the Sun’s planetary album in 170 years.
Aired:
| Expires: | Runtime: 3m 03s
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Extras
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What's Inside These Ancient Egyptian Jars?
A nearly 3,000-year-old canopic jar is discovered in an Egyptian tomb.1:58 -
Secrets of the Forest Preview
Follow scientists in a quest to understand how complex forest ecosystems can help cool our planet.0:30 -
The Rocket-Less Future of Space Travel
Space elevators? Nuclear rockets? The future of space travel could look radically different.5:17 -
Do Aliens Exist? This Famous Equation Offers a Clue
The Drake Equation helps scientists estimate the odds of finding intelligent alien civilizations.5:04 -
4 Ways the Universe Could End
If the universe as we know it started with the Big Bang, will it also have an end?5:07 -
Building Blocks of Life Discovered on Distant Asteroid
Scientists have discovered the building blocks of life in samples retrieved from a distant asteroid.6:03 -
Revolutionary War Weapons Preview
Explore key military technologies in the American colonies’ fight for freedom.0:30 -
What Went Wrong on the Dali Before the Baltimore Bridge Collapse
The container ship Dali lost power causing it to crash into Baltimore’s Key Bridge.2:57 -
What Caused Baltimore’s Key Bridge to Collapse?
Engineers explain how a vulnerability made the bridge open to catastrophe.2:57 -
This Pompeii Priest Had an Unexpected Rise to Power
In a recently discovered tomb in Pompeii, archeologists made a startling discovery.2:58
