You might also like
Join Phil for a tour of our capital-M Moon, from surface features, inside to the core, and back in time to theories about its formation.
12 • Crash Course Astronomy • Astronomy
"You might have thought, as I did then, that our species would be on Mars before the century was over"
6/10 • The Sagan Series • 1989 • Astronomy
The story is told in a documentary way, looking at the present day. The future mission is filmed as a movie. In this episode scenes are changing in these timeframes.
Today we’re talking about our galactic neighborhood: The Milky Way. It’s a disk galaxy, a collection of dust, gas, and hundreds of billions of stars, with the Sun located about halfway out from the center. The disk has grand spiral patterns in it, formed by the traffic jams of stars and nebulae, where stars are born. The central region is shaped like a bar, and is mostly old, red stars. There’s also a halo surrounding us of old stars.
37 • Crash Course Astronomy • 2015 • Astronomy
Tornadoes, hurricanes, snowstorms, lightning and floods – for us these destructive forces are symptoms of Earth's creative energy. The weather on Earth is one of the drivers for life and even the most violent and destructive storms create new opportunities for life to flourish. In our quest to discover if we are alone in the universe, we have recently hit upon a surprising new approach — we shouldn't just look for worlds, we should look for weather. What is true of Earth could also be true of other planets throughout the whole universe. Across the immense distances of space, find chaotic weather — find that megastorm — and maybe we will find alien life.
S2E2 • How the Universe Works • 2012 • Astronomy