Alien Planets • 2020 • episode "S1E1" • Space Phenomena

54:06

Extraterrestrial life = Science Fiction. Not so fast! -- the Cassini probe has provided photos of Enceladus, where scientists have found geysers of water vapor. And then there is Gliese 581g, a planet with Earth-like conditions....what would life forms look like in these watery environments?

5 • Cosmic Front • 2014 • Astronomy

42:37

Travel to 19th century England and meet Michael Faraday, a child of poverty who grew up to invent the motor and the generator. His ideas about electricity and discovery of magnetic fields changed the world and paved the way for future scientists to make giant strides in the world of high technology and instantaneous communication.

S1E10 • Cosmos: A Spacetime Odyssey • Astronomy

10:40

Today Phil’s explaining the stars and how they can be categorized using their spectra. Together with their distance, this provides a wealth of information about them including their luminosity, size, and temperature. The HR diagram plots stars’ luminosity versus temperature, and most stars fall along the main sequence, where they live most of their lives.

26 • Crash Course Astronomy • 2015 • Astronomy

42:00

Saturn's secrets are out. The ferocious weather, the evolving ring system and the discovery of active geology on Saturn's moons has rewritten the textbooks. Scientists are looking for life on Saturn's moons and they may have found it on Titan.

S3E5 • How the Universe Works • 2014 • Astronomy

50:00

The dramatic, moving and powerful story of humanity’s conquest of Mars, told by the people who risked entire careers to explore the red planet. Did we find evidence for life back in the ’70s? Some believe we did.

S1E4 • Secrets of the Solar System • 2020 • Astronomy

11:40

Now that we’re done with the planets, asteroid belt, and comets, we’re heading to the outskirts of the solar system. Out past Neptune are vast reservoirs of icy bodies that can become comets if they get poked into the inner solar system. The Kuiper Belt is a donut shape aligned with the plane of the solar system; the scattered disk is more eccentric and is the source of short period comets; and the Oort Cloud which surrounds the solar system out to great distances is the source of long-period comets. These bodies all probably formed closer into the Sun, and got flung out to the solar system’s suburbs by gravitational interactions with the outer planets.

22 • Crash Course Astronomy • 2015 • Astronomy