[00:02] one. How about the reddest object in the solar system, Amalthea? From its host planet, Jupiter, it shines as brightly as Venus does from Earth. Sadly, it's just a pile of rubble with a radius 20 times smaller than our moon, and it's
[00:15] four times less dense, so we'd have to say goodbye to our tides. Let's try Titan. It's 50% larger than our moon with an atmosphere four times denser than Earth's, which rains liquid methane. We could send probes to explore
[00:28] think microbes could have evolved to breathe in hydrogen and exhale methane. Rougher tides on Earth would be a small price to pay for alien neighbors. Life is less likely if we took fiery Io. With over 400 volcanoes ejecting plumes of
[00:42] over 400 volcanoes ejecting plumes of sulfur at least 300 km high, Io could would fade quickly [music] as its volcanic activity mostly comes from tidal interactions in Jupiter's system. But while it lasted, particles from Io's
[00:56] eruptions could give us spectacular auroras. Still, if it wasn't for our moon in its current orbit keeping us stable on our axis and stopping [music] us drifting into chaotic ice ages, we might not even be here at all. Maybe
[01:08] might not even be here at all. Maybe it's perfect just where it is.