Carl Sagan talks about our future and the exploration of space
Our species has discovered a way to communicate through the dark, to transcend immense distances
1989 • Astronomy
"You might have thought, as I did then, that our species would be on Mars before the century was over"
1989 • Astronomy
Carl Sagan talks about our future and the exploration of space
1989 • Astronomy
"That's home. That's us. On it, everyone you ever heard of, every human being who ever lived.."
1990 • Astronomy
To celebrate the 30th anniversary of its launch, this film tells the remarkable story of how Hubble revealed the awe and wonder of our universe and how a team of daring astronauts risked their lives to keep it working.
Astronaut Chris Hadfield reveals the unlikely and unexpectedly interconnected systems that allow life on our planet to breathe.
1/10 • One Strange Rock • 2018 • Astronomy
Discover how beauty and order in Earth's cosmic backyard was formed from nothing more than a chaotic cloud of gas. Chasing tornados in Oklahoma, Professor Brian Cox explains how the same physics that creates these spinning storms shaped the young solar system. Out of this celestial maelstrom emerged the jewel in the crown, Brian's second wonder - the magnificent rings of Saturn.
2/5 • Wonders of the Solar System • Astronomy
In 2033, the Daedalus crew struggles to find permanent shelter. Currently, the European Space Agency and Roscosmos partner to launch an orbiter.
The Apollo space program embraces tragic setbacks and historic success; the last stage includes the Apollo 11 space flight which landed the first two people on the Moon.
2/2 • Apollo Back to the Moon • 2019 • Astronomy
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