logo
episode-header-image
Nov 2019
13m 14s

The search for our solar system's ninth ...

TED
About this episode
Could the strange orbits of small, distant objects in our solar system lead us to a big discovery? Planetary astronomer Mike Brown proposes the existence of a new, giant planet lurking in the far reaches of our solar system -- and shows us how traces of its presence might already be staring us in the face.

Hosted on Acast. See acast.com/privacy for more information.

Up next
Yesterday
How we’re turning pollution into toys, toothpaste and more | Xu Hao
It took alcohol 200 years to go from scientific discovery to industrial revolution, but tech innovator Xu Hao says we can’t afford to wait that long to tackle the climate crisis. He explores why most climate solutions are still stuck in labs — despite breakthrough science that ca ... Show More
14m 22s
Oct 8
The best thing that could happen to the energy industry | Matt Tilleard
History has been written by whoever controls the dominant fuel of the era — until now, says renewables entrepreneur Matt Tilleard. He explains why, as the clean energy transition ramps up, we’re moving from a world where energy comes from burning fuels to one where it will come f ... Show More
13m 51s
Oct 7
Inside the Gaza peace plan | Ian Bremmer
October 7 marks the second anniversary of Hamas' horrific attack on Israel — and Israel's devastating response. Political scientist Ian Bremmer unravels the intricate dynamics of President Trump's ambitious peace plan, the stark realities facing Gaza, how Israeli Prime Minister N ... Show More
39m 48s
Recommended Episodes
Feb 2024
Exploring solar eclipses through time
This week on Planetary Radio, we delve into the evolution of humanity's relationship with one of our planet's most awe-inspiring phenomena: total solar eclipses. Ed Krupp, the director of Griffith Observatory in Los Angeles, will share insights from the fascinating field of archa ... Show More
52m 8s
Feb 2023
Defending the Planet from Asteroids
Our solar system contains millions of asteroids, orbiting our sun and rocketing through the night sky! Join scientists Kelly Fast, Tom Statler, and Davide Farnocchia as we discover what we can learn from these building blocks of the universe, and how NASA would respond if one wer ... Show More
27m 39s
Aug 2021
Lucy in the Sky With Asteroids
How did the planets form? How did life happen? Where did Earth’s water come from? To answer questions like these, scientists used to go big—looking at planets, dwarf planets, and moons—but now small is the new big. Technology is zooming in on the pint-size stuff—asteroids, comets ... Show More
30m 51s
Jul 2021
Let’s Go Planet-Hunting!
What do we know about the planets outside our solar system? NASA planet hunters Jessie Christiansen and Knicole Colon take us beyond...into the exciting world of exoplanets.   
19m 8s
Nov 2021
The hitchhiker’s guide to exoplanets and alien life
If television shows and movies are any indication, we humans spend a lot of our time subconsciously preparing for UFOs carrying maleficent aliens to descend on Earth. But should we rush to create an intergalactic battle plan? In actuality, finding otherworldly life won’t be so ea ... Show More
30m 44s
Nov 2023
How many planets are in space?
When you look up at the night sky, what do you see?  A few stars, or a satellite, maybe even one of the seven other planets in our solar system?  But how many planets are there in all of outer space? We asked astronomer Mark Popinchalk to help us find the answer! Got a question t ... Show More
4m 52s
Jun 2009
Telescopes that Rocked Our World
This year marks the 400th anniversary of Galileo’s use of the first telescope. On this week’s show, we reflect on how telescopes have shifted our perspective on how small we are in size, space, and time. We also discuss how they help astronomers discover new and interesting aspec ... Show More
56 m