Saturn: Mysteries Among the Rings • 2017 • episode "S1E4" • The Planets (US)

12:25

We’ve covered a lot of incredible stuff, but this week we’re talking about the weirdest objects in space: BLACK HOLES. Stellar mass black holes form when a very massive star dies, and its core collapses. The core has to be more than about 2.8 times the Sun’s mass to form a black hole. Black holes come in different sizes, but for all of them, the escape velocity is greater than the speed of light, so nothing can escape, not matter or light. They don’t wander the Universe gobbling everything down around them; their gravity is only really intense very close to them. Tides near a stellar mass black hole will spaghettify you, and time slows down when you get near a black hole — not that this helps much if you’re falling in.

33 • Crash Course Astronomy • 2015 • Astronomy

84:57

If a massive asteroid collides with earth, it could end life on our planet as we know it; new discoveries and cutting-edge tech reveal just how close we are to apocalypse and what it would take for the world's leading space agencies to stop it.

S8E1 • How the Universe Works • 2020 • Astronomy

28:46

It's not as crazy as it sounds: life on Earth could be descended from space-faring microbes from Mars, or even further beyond, riding here on an interplanetary highway of asteroids. Extremophile bacteria may be resilient enough to survive the intense 3-stage journey, by repairing their own damaged DNA or hibernating for the long and deadly journey through space.

melodysheep • 2026 • Astronomy

59:02

Brian Cox explores the ingredients needed for an intelligent civilisation to evolve in the universe - the need for a benign star, for a habitable planet, for life to spontaneously arise on such a planet and the time required for intelligent life to evolve and build a civilisation. Brian weighs the evidence and arrives at his own provocative answer to the puzzle of our apparent solitude.

S1E3 • Human Universe • 2014 • Astronomy

9:41

The Hayabusa2 spacecraft has just completed one of the most intricate procedures in space exploration. The first mission to deliver rovers onto an asteroid has now descended to its surface for a sample, before returning back to Earth in 2020.

Breakthrough • 2019 • Astronomy

46:17

A Beautiful Planet is a breathtaking cinematic journey that offers a rare perspective of our planet as seen from space. Narrated by Jennifer Lawrence and filmed in stunning IMAX 3D, the documentary takes audiences aboard the International Space Station alongside NASA astronauts. Through awe-inspiring visuals, it showcases Earth’s vibrant landscapes, diverse ecosystems, and the delicate balance that sustains life. The film not only highlights the planet’s natural beauty but also draws attention to the environmental challenges we face, including deforestation, pollution, and climate change. By juxtaposing scenes of Earth’s splendor with the visible impacts of human activity, the film delivers a powerful reminder of our shared responsibility to protect our home. More than just a space documentary, it is a moving call for global unity and stewardship of the planet.

2016 • Astronomy