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55 votes
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Can a planet be tidally unlocked?

A planet in our very solar system has actually gone through such a shift! Venus currently has a 243-day long retrograde spin, but likely didn't always. The current theory says it started with the ...
BoomChuck's user avatar
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54 votes
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How would you build a harbor in a world with *intense* tides?

LOCKS The answer is one that is used extensively today in canals and rivers: Locks. Locks are basically double water-tight gates. If you want to go from high water to low, you sail in, the gates are ...
Klaus Æ. Mogensen's user avatar
53 votes

Can a planet be tidally unlocked?

If your tidally-locked planet captured a large moon, sort of like the one we have here on Earth, the tidal forces of the moon could be stronger than the tidal forces from the star. This would result ...
Mike Nichols's user avatar
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39 votes
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How to create tides in a small sea?

Rocking Your continent is floating. Maybe it is rocking back and forth as it floats. That can happen with floating things. Any number of forces can put a body into an oscillating motion. As ...
Willk's user avatar
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36 votes

How would you build a harbor in a world with *intense* tides?

Some years ago I went to Scarborough (Yorkshire) and visited the local harbor during low tide: all the ships were sitting on wet sand, as shown in the painting below (for some reason I can only find ...
L.Dutch's user avatar
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26 votes

How would you build a harbor in a world with *intense* tides?

Just take a look how communities with much higher than average tides handle the issue IRL. e.g. these boats are in the Bay of Fundy, which due to quirks of geography has the worlds highest tides at up ...
Eugene's user avatar
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23 votes

Is it possible to have a near tidally locked planet?

Yes! In fact, we can find it right in our solar system. Mercury is the closest thing to what you would want. It is in a 3:2 spin-orbit resonance, meaning 3 Mercurian days happen every two Mercurian ...
0something0's user avatar
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21 votes

Materials in a tidal water world

Maybe you can get some inspiration from the Uru People that live over Lake Titicaca. They create artificial floating islands, with small houses on it, with a plant called Totora. This plant commonly ...
Lupino's user avatar
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21 votes
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Can a planet still function with a damaged moon?

In order for the fragments not to simply reform into a single body from their own gravity, the damaged moon would have to meet certain criteria. Either it would have to be within the planet's Roche ...
Zeiss Ikon's user avatar
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17 votes
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Tide without moons

Tidal forces just require nearby things that are big enough to have a decent gravitational pull on a planet (or other body). The strength of the tidal force on the planet is proportional to the ...
Starfish Prime's user avatar
13 votes

Is there software to help me model tides?

Unfortunately the answer is no. Serious props to you if you want to have a go at coding this. There is probably a PhD in it. One of the primary resources on the topic is the Admiralty Manual of Tides ...
pHred's user avatar
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13 votes

Materials in a tidal water world

Perhaps on your world, seaweed grows up to the surface like in the Sargasso Sea. If so, that seaweed could be harvested and dried into a building material. Perhaps its natural saps form a resin ...
Henry Taylor's user avatar
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13 votes

How would you build a harbor in a world with *intense* tides?

Given the extreme tide experienced globally, smaller boats as we know them would likely fall out of favor, and the daily driver would be overtaken by amphibious vehicles, which can negate the need for ...
Wazoople's user avatar
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12 votes
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Massive tides and resources

You cannot have neither A or B. Of the two, B is the more implausible: the water is being pulled in 3 directions (up, right and down) by a single moon. About A, I would expect the two spheres (solid ...
L.Dutch's user avatar
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12 votes

Tide without moons

First of all, if the atmosphere is too thin, there will be no liquid water at all, in particular if the temperature is higher than on Earth: with lower atmospheric pressure, water evaporates more ...
L.Dutch's user avatar
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11 votes

Tides with 3 Largish Moons

You can't achieve what you want with reality I should have explained this clearly when I first wrote the answer. I apologize for not having done so. I do not believe it is possible to achieve the ...
JBH's user avatar
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11 votes

Can a planet be tidally unlocked?

No. Not without another body getting involved. Tidal forces within the planet are constantly pushing it towards the "locked" state, you need a massive input of energy to change that. We're talking ...
Tim B's user avatar
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11 votes

Can a planet still function with a damaged moon?

The book Seveneves has the moon break into 7 parts for no particular reason. It just broke; it did not blow up. The parts bump and grind into each other. A few weeks after it happens one big part ...
Willk's user avatar
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10 votes

Are these conditions for a planet realistic?

Yes that sounds reasonable. Your moon has to stay out of the Roche limit in order not to get ripped apart. The Moon is ~ 400,000 km away, the Roche limit is only ~10,000km so you can move it closer. ...
ventsyv's user avatar
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9 votes
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Tides on a Water World

Tides would be largely insignificant. Tides don't have much effect on ships in mid-ocean. The tidal forces of the moon pull the seas up by about 40cm. When this reaches land it causes flows which ...
James K's user avatar
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9 votes

Can a planet be tidally unlocked?

Yes, by radial mass redistribution. Something similar to the iron catastrophe on early Earth, or the melting of ice caps after ice ages. If something rises the internal temperature, it could trigger ...
Camilo Rada's user avatar
8 votes

Materials in a tidal water world

The best real-world example to use here are the Inuit. They live in the coastal arctic, an area with no trees. However, they get around this by using driftwood that washes up on their shores. If trees ...
The Weasel Sagas's user avatar
8 votes

Tide without moons

The sun also produces tides, though on earth it's somewhat smaller compared to that of the moon. So yes, if your planet is not a rogue planet, it will probably have tides.
Rain's user avatar
  • 81
8 votes

What arrangement of celestial bodies would allow high and low tide to last for the longest time?

Gas giant moon, almost tidally locked. Our moon travels around our planet and causes the tide as it goes pulling the ocean towards it. A smaller high tide occurs on the far side of the moon. https://...
Willk's user avatar
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8 votes

How would tides work on a floating island?

The islands would be pushed and lifted by the tides. Tidal generation would be worse on these islands than on a regular island. There might, however, be a quirky way to generate power. A tide is ...
lupe's user avatar
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7 votes

Are these conditions for a planet realistic?

All your settings are completely plausible. I upvoted the @ventsyv answer; but I need to correct one thing: Planets can rotate at any speed; in any direction; thanks to collisions during their ...
Amadeus's user avatar
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7 votes

Can one or multiple moon(s) pull the sea around my planet?

I am afraid a moon cannot achieve what you are asking. Noticeable tides require noticeable water depth, and few meters excursion on few kilometers average depth do not leave the surface dry. If a ...
L.Dutch's user avatar
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7 votes

Can one or multiple moon(s) pull the sea around my planet?

The moon causes our tides, but not in the way most people believe. My answer below is belied by the this wonderfully detailed post, which explains exactly how tital forces playout, and debunks my ...
Binary Worrier's user avatar
7 votes
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What are the circumstances in which swamps or everglades can have dramatic low and high tides?

Mangroves in an area with naturally high tides works Here is a mangrove forest in Kiribati at high tide: Here is one in Thailand at low tide: Mangroves are designed for this sort of enviornment. ...
kingledion's user avatar
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