More moons! Gas giant moonbuilding featuring shepherd moons, major moons, captured asteroids and, of course, habitable moons!

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WATCH MORE:

► Stars : https://goo.gl/DTefZk
► Galaxies : https://goo.gl/y1d4zn
► Planetary Systems : https://goo.gl/jQy3o2
► Planets : https://goo.gl/KWhpYd
► Orbits : https://goo.gl/hhqZ7z
► Languages : https://goo.gl/KUng4y
► Seasons: https://goo.gl/ekyzh5
► Moons: https://goo.gl/swLfbo

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USEFUL EQUATIONS FROM THIS VIDEO AND THE LAST:

► Density: (% x p) + (% x p) ... etc
► Mass: R^3 * p
► Surface Gravity: M / R^2
► Hill Sphere: a * (m / M)^(1/3) x 235
► Roche Limit: 2.44 * R * (pp / ps)^(1/3)
► Orbital Period: 0.0588 * (R^3 / (M+m))^(1/3)
► Ellipsoid Mass: p(4/3)πabc

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FOOTNOTES:

► 00:33 : The upper limit is the generic roche limit and the inner limit is based on the average inner limit of the ring systems in the solar system. In "If Earth had Rings" I suggested that the inner limit of a ring system will coincide with the upper limit of the Earth's atmosphere, because we don't care about the habitability of the gas giant itself we can play fast and loose with this inner limits. There is data to suggest that Saturn's rings (however tenuously) extend down to it's "surface".

► 02:32 : First order mean motion resonances are the most stable, i.e., 9:8, 12:11 etc

► 03:16 This relationship holds for the solar system but it's not known if it will apply to exogas giants.


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CREDITS:

Music:

"Unwritten Return" Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0
http://creativecommons.org/licenses/b...

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Thank you all so much for watching…Edgar out!