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Asteroids have a bad reputation as deadly rocks from space. They wiped out the dinosaurs and will be back for us. But that's only half the story. Ancient asteroids built the Earth. And they may have brought life to its barren surface. Asteroids will shape our future as much as our past. They are the perfect location for deep space colonies and could be the stepping stones that eventually send humans out into the cosmos. From icy worlds with more fresh water than Earth to flying mountains of pure metal, a hundred miles wide, scientists are striving to unlock their secrets. Could these enigmatic space rocks hold the key to how life in the Universe arises and is extinguished?
S2E7 • How the Universe Works • 2012 • Astronomy
Follow astronaut Scott Kelly’s record-breaking 12-month mission on the International Space Station, from launch to landing, as NASA charts the effects of long-duration spaceflight.
2016 • Astronomy
The inner planets, Mercury and Venus, orbit closest to the Sun, making them literally an Inferno of heat. NASA and other space agencies have attempted to learn more about these rocky planets. Follow the plucky probes that attempted to decipher the secrets of the Solar System's inner circles of hell.
4/6 • Space Probes • 2016 • Astronomy
Astronaut Mike Massimino investigates the possibility of a giant ninth planet at the edge of the solar system; using the latest technology, he reveals the incredible secrets of this mysterious world.
S1E5 • The Planets (US) • 2017 • Astronomy
Today we’re rounding out our planetary tour with ice giants Uranus and Neptune. Both have small rocky cores, thick mantles of ammonia, water, and methane, and atmospheres that make them look greenish and blue. Uranus has a truly weird rotation and relatively dull weather, while Neptune has clouds and storms whipped by tremendous winds. Both have rings and moons, with Neptune’s Triton probably being a captured iceball that has active geology.
19 • Crash Course Astronomy • Astronomy
Today Phil explains how telescopes work and offers up some astronomical shopping advice.
#6 • Crash Course Astronomy • Astronomy