Harvard Lecture, "Life as a Planetary Phenomenon" class: Exomoons
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Video of a guest lecture I gave at Harvard as part of the "Life as a Planetary Phenomenon" class (SPU30). In this lecture, I discuss the moons of the Solar System and beyond. I cover the properties of the moons in our solar system, evidence for their formation and origins, resonances and tidal heating in the Galilean satellites and the possibilities for life both in sub-surface moon oceans and on more Earth-like moons. The lecture closes with a discussion of how astronomers can search for exomoons using data from NASA's Kepler space telescope. As this class was for non-science majors, much of the science was simplified.
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Titan is a moon in this solar system and has more atmospheric surface pressure than the Earth, and is only 2-3% of Earth mass, about 2x mass of Moon and similar surface gravity- so the need for 10% of Earth mass for atmosphere is too high even as an approximation. Mars is 40% of Earth mass, so need for 50% of Earth seems too low, Mars has been dead geologically for a long time, at least billions of years. Venus is about 90% of Earth mass and is active, all be it in a strange all at once way every few 100 million years, so a bit smaller is still ok- but not much.
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great way to do an interactive keynote!
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So this is how Harvard trains the elites of tommorow: chocolate for tweets...!! ;)
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