To really study something you want to reach out and touch it. But what can you do if you’re separated by huge distance. You reach out with electromagnetic or sound waves and watch how they bounce back. Thanks to radar, sonar and lidar.
Scientists manage to map a highly detailed gravity map of our planet. And it turns out, this is very useful for other worlds too.
How do we know what planets lights years away have in their atmosphere? What about the rocks all around Curiosity?
Some of the biggest questions in the universe depend on its shape. Is it curved? Is it flat? Is it open?
Good news! There are hundreds if not thousands of times more of them than worlds like Earth. Bad news? They’re locked in ice.
Gravity is always pulling you down, but there are places in the solar system where gravity balances out. These are called Lagrange points and space agencies use them as stable places to put spacecraft
To move around in space, you need some kind of propulsion system. And for now, that means rockets. Let’s learn the underlying science of rockets, and how they work.
Celebration of 500 episodes of astronomy cast and what to do next
We started out Astronomy Cast with the controversial decision to de-planet Pluto. And here we are, more than a decade later, at the brink of recording our 500th episode when another big decision is coming down from the IAU: Whose name goes on the concept that our Universe is expanding: Hubble or Lemaître?
Let’s talk about antimatter.