Journey of the Universe • 2012

42:01

The possibility of a human civilization on Mars has seemed like a fantasy -- until now. We go behind-the-scenes at SpaceX, where Elon Musk shows us just how real this fantasy can be.

S1E3 • Mars: The Secret Science Series 1 • 2014 • Astronomy

12:46

Now that gravitational waves are definitely a thing, it’s time to think about some of the crazy things we can figure out with them. In some cases we’re going to need a gravitational wave observatory - in fact, we've already built one.

PBS Space Time • 2018 • Astronomy

15:50

The ICARUS system monitors the movements and behaviours of Earth’s creatures from space. An antenna mounted on the International Space Station receives data from tiny trackers attached to animals and birds, opening the door to new discoveries that can warn us of natural disasters and outbreaks.

S4E3 • Breakthrough • 2021 • Astronomy

58:55

Brian reveals how - as our exploration of the cosmos has deepened - we have even been able to piece together how the universe itself began.

S1E4 • Human Universe • 2014 • Astronomy

59:04

With his trademark wit, Richard Hammond takes on the ultimate engineering project: how on earth do you build a planet that is just right for life? What do you need to build a planet like ours, and what happens if you get anything wrong? With eye-popping graphics, Richard Hammond opens up a cosmic toolbox to work it out. He's going to build the whole thing, piece by piece, from the top of a two-mile high tower in the Californian desert.

S1E1 • Richard Hammond Builds... • 2013 • Astronomy

5:45

The expanding universe is a complicated place. During inflation the universe expanded faster than light, but that's something that actually happens all the time, it's happening right now. This doesn't violate Einstein's theory of relativity since nothing is moving through space faster than light, it's just that space itself is expanding such that far away objects are receding rapidly from each other. Common sense would dictate that objects moving away from us faster than light should be invisible, but they aren't. This is because light can travel from regions of space which are superluminal relative to us into regions that are subluminal. So our observable universe is bigger than our Hubble sphere - it's limited by the particle horizon, the distance light could travel to us since the beginning of time as we know it.

Veritasium • 2014 • Astronomy