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Questions tagged [tides]

For questions about the gravitational interaction between astronomical bodies. This tag often describes water currents, but can also be applied to planetary phenomena such as tidal locking and tidal heating.

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Tides on a Super Close In Moon

I have a moon covered in liquid water that orbits a super-Earth very closely. As you might imagine, the tides are incredibly strong on this moon. However, it is tidally locked and so does not ...
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1answer
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Only changing the mass of the moon, how much can lunar mass increase before the Earth becomes uninhabitable?

Bonus: How much would the increase in lunar mass increase average tides? & which factors would cause the Earth to become uninhabitable?
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Can a planet be tidally unlocked?

In my answer to another question, I suggested that the Super-Earth in question be tidally locked to its host star for a period of time while part of its surface experienced a bombardment. After that's ...
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Tides with 3 Largish Moons

I would like to have an Earth-like planet (~Earth gravity, ~Earth day, ~Earth year, and liquid water oceans) with extreme variance in its tides. I want the lowest tide to reveal about 30 miles of ...
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Temperature and climate “under” the gas giant in a tidally locked moon

I've begun the laborious (but fun!) process of putting another world together. Known constraints include: Habitable, (super-)Earth-sized, tidally-locked moon to a gas giant; the giant, where visible,...
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3answers
153 views

How can I create a new planet/satellite system that generates tides of 6-8 metres?

I'm creating a new setting for a novel. I'd like to build a world where the interaction between the planet and its satellite/satellites can generate a normal tide excursion around 6/8 metres. ...
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2answers
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Independently Tidelocked Moon?

Simple question that might seem odd. Not going to get too specific but I am curious, more or less, as to what it would look like for a planet that had a moon (A habital one) which was in essence ...
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1answer
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Co-orbits and Tides

I've seen many questions about tides and tidal variations on a wide variety of interesting single star, multi star, single planet, binary planet, single moon, multiple moon, and even ring system ...
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2answers
225 views

Finding the size of tides

I have a planetary system in which there is a huge planet and a moon orbiting it which has an atmosphere and water (and actually everything needed to sustain life). Thing is that I'm sure the mass of ...
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6answers
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Materials in a tidal water world

I'm trying to create a people that live on this rolling tide (see previous question or on 'millers planet') but I haven't figured out where they would get wood to build their boats/homes. If the tide ...
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1answer
640 views

Massive tides and resources

Assuming a situation similar to this, where the moon causes slower but massive tides that slowly encircle the globe. Would the poles be constantly underwater or not underwater (like A or B below)?: ...
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3answers
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Is there software to help me model tides?

I have a planet orbiting a roughly Sun-like star, accompanied by a moon that's a bit more massive than our own Moon. The surface is about two-thirds water and one-third land, with most of the land in ...
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1answer
225 views

Two planets with the same orbital period [duplicate]

I have the following star system configuration: All bodies always stay on one line. Star is similar to sun by parameters. "Green" planet is Earth-like exoplanet with 1 earth-year orbital period, ...
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3answers
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Would it be possible to create tides that fluctuate every 25 days and rise/recede quite drastically. possibly up to a mile

Like the title, my world has drastic tides that complete a cycle in roughly 25 days. is this possible? My limited knowledge of astronomy leaves me pretty limited. I understand that there would have to ...
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1answer
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Is it possible to have a near tidally locked planet?

I'm working on a story where the characters are stranded on a planet that turns so incredibly slow that it acts like a tidally locked planet, with one side burning and the other frozen. However ...
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3answers
185 views

How big does a moon have to be to have the earth locked to it?

I would like a earth-moon system like Pluto-Charon (but with earth instead of Pluto) where both will be tidally locked to each other within something like 3 billion years (before complex life appears)....
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Do moons determine the speeds at which tides move? Is there a limit to this speed?

I'm writing a short story that takes place on an imaginary planet that is 88% ocean. The planet has two moons and one continent that is regularly flooded under 500 to 1500 feet of water. The tides are ...
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2answers
219 views

Two-moon question [duplicate]

I want two moons in my novel's new world, but hope to have minimal changes in tides, etc. Would it be possible to have a very small moon that doesn't wreak havoc on nature? Also, is it possible for ...
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2answers
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How to accelerate the rotation of an Earth-sized planet? [duplicate]

Colonists want to settle on Proxima Centauri a. The planet is slightly bigger than Earth, lies in the habitable zone, does have water and life (in my novel). But the problem is that only a 500-...
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2answers
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How to determine whether my dragon hunting trophy can stay afloat on a lake?

Continued from Can a person covered in mud survive an ordeal with fire breathing dragon? Miraculously my protagonist managed to subdue the fire breathing dragon and knock it unconscious. He then tied ...
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1answer
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Would An Earth-Like Moon Be Tidally Locked? [duplicate]

Could a moon of similar size to the Earth orbiting a gas giant be tidally locked compared to its host planet? What effect would that have on the moon, especially the biosphere?
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1answer
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Size and Effect of Ocean Tides on My World

I'm building a world that orbits close in to an M-Dwarf sun. I've figured out a bunch of the physical parameters of the world, I just can't quite get a solid handle on my tides. I know my tides will ...
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1answer
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If the moon gradually disappeared over two years [duplicate]

An evil sorceror has cast a spell on the moon. Over the course of two years, it will seemingly disappear. It will disappear from the surface inwards. Anything touching the surface shall be treated as ...
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1answer
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Where to find equations to calculate tidal heating in a binary planet/planetesimal system?

I'm building a very small homeworld (0.602 M$_e$) with a very large moon (0.0711 M$_e$) that orbit each other at a barycenter about 7.12 planetary radii (1 R = 0.870 R$_e$) from the primary's center; ...
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2answers
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Winds on a tidally locked moon of a gas giant

My idea has been a colonized planet or moon with incredibly strong winds so that life is only possible in deep valleys protected from the wind. I recognize that wind is primarily driven by ...
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1answer
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What are the circumstances in which swamps or everglades can have dramatic low and high tides?

I'm actually trying to create an alien ecosystem, so changing orbits, what's exhibiting tidal forces and the geography and such is welcome if needed. I also wonder how stable a setup with dramatic ...
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2answers
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Rock formations & islands on a moon with megamareal tides

This concerns a habitable, earthlike moon orbiting a gas giant, which is not tidal locked, and has an elliptical orbit eccentric enough to avoid frequent deep winter freezes (the freezes do happen, ...
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2answers
251 views

Tides on a Water World

How would waves and tides work on a planet that is completely covered by Ocean? It would have: Oceans of Similar depth to Earth's Atmosphere extremely similar to Earth's Same type of star and ...
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9answers
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Can one or multiple moon(s) pull the sea around my planet?

I'm building a world which is 50% covered by the sea. For approximately half the year, the sea covers one hemisphere; for the other half it moves to the other hemisphere, leaving the first a dry sea-...
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1answer
187 views

How would tidal forces impact two habitable moons in a horseshoe orbit?

I saw this video a while ago, and recently it's gotten me thinking. Towards the end of Artifexian's video on gas giants and habitable moons, he mentions the idea of having 2 habitable moons in a ...
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4answers
396 views

Almost tidally locked to moon and the tides it would create

I have a world with a moon, much like Earth and the Moon, except that the planet is almost tidally locked to the moon. The moon therefore appears to move only very slowly through the sky, and takes, ...
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1answer
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World with core of changing mass, gravitational effect on tides?

I'm building a fantasy world with a planetary core that gains and loses mass in a predictable manner. I want the gravity to increase and decrease by 50% in both directions over a period lasting 2-3 ...
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1answer
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Would the Earth still need a moon if it had rings?

If the Earth had Saturn-like rings going around the equator would there still be a need for a moon? Would the rings be able to take care of the tides because of their gravity? Would the moon become ...
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Are these conditions for a planet realistic?

Since I'm creating a "new world" for my story, I wanted to know if the following conditions would work for an Earth-like planet: Its moon (more or less same size as our moon) being much closer (but ...
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1answer
435 views

Tides on a double planet

I am making a world to be the setting of my future fantasy works, which is to say I really have no story planned but I want to have a world for it when I do and I want said world to be likely give me ...
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11answers
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How to create tides in a small sea?

I've done a bit of research and small bodies of water don't have significant tides, even the Mediterranean doesn't have particularly large tides. So how can I get bigger tides on a small body of ...
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2answers
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Effect of two moons on wildlife

So given an inconceivably Earth-like planet with two moons in slightly differing orbits, how would the changed tidal system affect the wildlife? Specifically, What general type of marine wildlife ...
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0answers
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Temperature of the sunset/sunrise band of a tidally locked planet [duplicate]

Assuming an Earth-like planet (in terms of size, distance from sun etc) that is tidally locked to its sun, it would seem that the "dayside" would be permenantly burning and the "nightside" permenantly ...
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2answers
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I'm building a fantasy world like Earth but it has two moons adjacent to each other in a co-orbital configuration and need help

I am looking for help on the following: Will that have any affect on the length of days and nights? Would having two moons create a higher body of water on the planet due to increased tides? (i.e. ...
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3answers
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How do the tides work when the sun powers the moon to keep out evil?

So I wanted to give the players a reason to eventually go to the moon. But this is a fantasy setting, so having the moon just be a big rock floating in space would just be so.... blasé. So I came up ...
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3answers
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What can be used to anchor the Moon?

Say the moon is drifting further away from Earth at an astonishing rate of 3.14159km each year due to the crazy tides, the rising sea level and shielding us from stray asteroids. Given 150 years time ...
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1answer
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Planet with 4 major moons, Habitable?

I designed my Kepler Bb planet to have 4 major moons. They each have a differing trajectory and are in resonant orbits for stabilization. I also designed the planet to have earth gravity but be bigger ...
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1answer
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Habitable moon of a gas giant: working out the size of the tide

I'm creating a fictional planet that orbits a gas giant (a lot like Jupiter). I'm working out all the issues listed here and here. But what I'm really having trouble with is the size of the tide. In ...
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5answers
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Is a habitable planet in a sextenary star system possible?

So I want my planet to have six suns, but I'm not sure how far apart these stars would have to be from each other to not produce adverse effects on the planet that would prevent life from developing. ...
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What kind of planet would have a “megamareal” tidal range?

A large group of people has been banished from Earth and punished to scrape out a perilous existence on a strange planet. The planet has breathable atmosphere, and consists of an immense ocean teeming ...
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2answers
318 views

What would Earth tides look like if the Moon was in a polar orbit (instead of an equatorial orbit)?

Take the earth-moon system. Shift the moon's orbital plane about 90 degrees so that it is passes over both poles. What would the tides on this world look like? Sub-questions: What would the cycle ...