u/HermitArcana

Can a planet be tidally locked to its moon AND have a second orbiting moon?

Wierd phrasing, as the moon its tidally locked to would be orbiting the planet WAY faster than the other one (at the speed the planet spins around it’s axis = 1 orbit[month] pre day).

From what I’ve gathered, a planet can be tidally locked to its moon (not entirely sure about Earth-like planets though). But could the system have a third body, which orbits the planet at a slower pace, and thus appears from the surface like our moon does: rising and falling during the day? I would assume the tidal force of the “orbiting” moon would interfere with the tidally locked one, but also that the tidal force of the planet would be greater, so idk. What would be the requirements for this to work? (sizes/distances of the moons etc.) Google isn’t helping.

This is for a worldbuilding project, so assume the planet is habitable. I was experimenting with a planet having a “secret moon” that always stays in place and thus is only visible from one hemisphere.

Any insights you might have are welcome. Thanks!

reddit.com
u/HermitArcana — 3 days ago

Hi. I was wondering (for worldbuilding purposes) if a tidally locked planet could have a moon that’s big/close enough and on a slow enough orbit that it would periodically cause a planetwide eclipse for a few (earthly) weeks/months that would cool the planet enough to cause “winter” in the temperate habitable belt and make (a part of) the hot side accesible.

Assuming it is possible, what would it look like? What are the necessary conditions (size, distance of the moon…)? Approximatelly how long would the eclipse need to last and how often would it occur as a result? How big a portion of the hot side could be made accessible (without freezing everyone in the temperate zone) and what could the terrain look like the deeper to the hot side you’d venture?

I’ve been playing around with this concept for a while now but couldn’t find any helpful information online, so I thought to ask here. Any info you can provide will be great! Thanks!

reddit.com
u/HermitArcana — 20 days ago

Worldbuilding, so I don’t know if this is the right sub. Basically, I was wondering if it’s possible for a habitable planet to have an equator so hot it would be impossible for humans to cross without modern technology, at least in most places, including by sea. And what would the conditions look like? Are we talking glass deserts and boiling oceans or is that an overkill? Could a sufficiently tall mountain pass provide a safe path to cross? Could the planet still have icecaps (and temperate climate zones)? What would the weather be like? I imagine constant storms around equatorial seas, but would they affect the whole planet?

Thanks for any info you can provide!

reddit.com
u/HermitArcana — 22 days ago