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New discoveries reveal the power of microscopic alien organisms. The discovery of extraterrestrial life might face an impossible challenge: the physics of the universe itself.
S9E4 • How the Universe Works • 2021 • Astronomy
It’s been conjectured that the center of the Milky Way is swarming with tens of thousands of black holes. And now we’ve actually seen them.
PBS Space Time • 2018 • Astronomy
Lunar days are about 14 Earth days long, and when night comes, temperatures plummet. But there are other issues to deal with as well. For instance, how can we overcome the moon's lack of atmosphere; difficult terrain with abrasive particles, and the effects of cosmic background radiation?
4/5 • Destination: Moon • 2016 • Astronomy
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
In this episode of Crash Course Astronomy, Phil takes you through the cause and name of the Moon's phases.
#4 • Crash Course Astronomy • Astronomy
Worried about black holes? Consider this: Every time you accelerate - you generate an event horizon behind you. The more you accelerate away from it the closer it gets. Don’t worry, it can never catch up to you, but the Unruh radiation it generates sure can.
PBS Space Time • 2018 • Astronomy