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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
Artemis arrives on the exoplanet Minerva B, but have they found evidence of life?
3/4 • Living Universe • 2018 • Astronomy
From a greenhouse in Holland to a desert landscape in Iceland, scientists are using the earth to tests ways to keep a Mars settlement alive and well. It’s the ultimate survival challenge, requiring major innovations to find water, grow food and clean the air.
4/5 • Destination Mars • 2015 • Astronomy
Is there a border we will never cross? Are there places we will never be able to reach, no matter what? It turns out there are. Far, far more than you might have thought…
In a Nutshell • 2016 • Astronomy
Welcome to the first episode of Crash Course Astronomy. Your host for this intergalactic adventure is the Bad Astronomer himself, Phil Plait. We begin with answering a question: "What is astronomy?"
#1 • Crash Course Astronomy • Astronomy
Astronaut Mike Massimino reveals the mysterious secrets of the moon, a world permanently tied to Earth; using new research, he uncovers the mysterious origin of the moon and how it kick-started life on Earth.
S1E8 • The Planets (US) • 2017 • Astronomy