Comments by "" (@neutronalchemist3241) on "Have We Found Our Future Home? | Answers With Joe" video.

  1. No. That planet has normal day-night cycle and seasons. It probably only orbits around a variable star, with a cycle of some year.
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  2. As you said, Mercury is tidally locked to the Sun in a 3:2 spin orbit resonance. Even if that's probably more unusual than the 1:1 lock, that's probably not so much unusual (it only needs a certain eccentricity of the orbit). In a bigger planet than Mercury it means spin and geological activity (due to the same tydal force) needed for a magnetic field. IE, if Trappist D is tidally locked in a 3:2 cycle the time between a "midday" and "midnight" there will be of 4 of our days, that's still pretty comfortable. Probably those would be the "best" planets.
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  3. Any impact strong enough to spin a tidally locked planet to an earthhlike day lenght, would destroy the planet as well. As he said, Mercury is tidally locked to the Sun in a 3:2 spin orbit resonance. Even if that's probably more unusual than the 1:1 lock, that's probably not so much unusual (it only needs a certain eccentricity of the orbit). In a bigger planet than Mercury it means spin and geological activity (due to the same tidal force) needed for a magnetic field. IE, if Trappist D is tidally locked in a 3:2 cycle the time between a "midday" and "midnight" there will be of 4 of our days, that's still pretty comfortable. Probably those would be the "best" planets.
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  4. No. That planet has normal day-night cycle and seasons. It probably only orbits around a variable star, with a cycle of some year.
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