Questions tagged [tidally-locked]

Identifies questions about tidally-locked celestial objects, such as a moon orbiting a planet or a planet orbiting a star. A tidally-locked celestial object rotates once per orbit, always keeping the same face toward the object that holds the lock. Questions may address the physics and consequences of a tidal lock and are not limited to individual dominant-subservient relationships.

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On a tidally locked moon of a gas giant, would the atmosphere bulge along with the crust?

So I did the math and the crust would bulge 8000 meters due to being tidally locked. On Earth such an elevation would mean the air is extremely thin. I was wondering if the atmosphere would bulge ...
www's user avatar
  • 743
10 votes
4 answers
1k views

Would caves maintain a cool temperature on the hot side of a tidally locked planet?

I've heard it said that caves on Earth are roughly 10°C/50°F regardless of the temperature at the surface. Does this hold up if a planet is very hot? How hot could temperatures get above ground while ...
Sam Moon's user avatar
  • 381
1 vote
2 answers
109 views

Would a moon that is tidally locked to a gas giant rotate at an axis?

Can a tidally locked moon have an axial tilt and have seasons like Earth? If not, what if the gas giant was tilted. Would the moon follow its tilt?
www's user avatar
  • 743
1 vote
1 answer
106 views

How far away can a tidally locked planet be from a star?

I have a planet in my worldbuilding project that, fifth planet from its small (compared to the Sun) star, which is meant to be tidally locked. Could a planet as far away that be tidally locked?
Dorothy Vivian's user avatar
3 votes
1 answer
311 views

How do ocean currents work on a tidally locked planet?

I am currently designing a tidally locked world with a big enough ocean to transfer heat from the day side to the night side and vice versa. Here is a map of my world: The darker sides are supposed ...
ΓΙΑΝΝΗΣ ΜΙΧΑΗΛΙΔΗΣ's user avatar
3 votes
2 answers
298 views

What seasons would look like on a supercontinent on the planet-facing side of a tidally-locked moon

I have read through previous questions here about seasons on a tidally-locked moon (I'm hoping this is far enough away from those to not be a duplicate question) and I think I understand the theory of ...
SaintDiabolus's user avatar
10 votes
6 answers
3k views

Equivalent of cardinal directions on a tidally-locked planet?

I am making a game with the explorable world divided into multiple labeled regions. There is great convenience and simplicity in being able to reference the cardinal directions when labeling these ...
ZarHakkar's user avatar
  • 385
0 votes
0 answers
33 views

Size of parent planet in the sky from a tidally locked moon [duplicate]

TLDR: Can anyone explain to me (like I am five and very bad at math, the latter of which I actually am) how to determine the size of the parent gas giant in the sky of my moon? EDIT: I am asking for ...
SaintDiabolus's user avatar
0 votes
0 answers
135 views

Wind patterns on a tidally locked planets contradict my logic (looking for correction)

My take on the wind patterns on a tidally locked planet (TDL) does not lead to the information given in papers and videos. Please tell me where I went wrong. My take: On a TLP, the sub-solar point is ...
Alon's user avatar
  • 101
3 votes
1 answer
127 views

Can a tidally locked planet with two counter-orbit moons exist for at least 100,000 years?

I believe it is true (correct me if I'm wrong) that a planet with a significant moon such as ours cannot be tidally locked. The orbit of the moon would continue the rotation of the planet and must, ...
JBH's user avatar
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3 votes
3 answers
148 views

Would the substellar point on a tidally locked planet with a large continent over that point and oceans around the edges be covered in rainforest?

I have been working on a tidally locked planet for some time now. During this time I have worked under the assumption that the substellar point would be arid because of the constant bombardment of ...
treeg886's user avatar
4 votes
2 answers
358 views

A 1:1 tidally locked world begins to spin. What sorts of non-solar natural disasters occur?

As stated a tidally locked world that has complete 1:1 begins to spin slowly. It starts slowly, a 2:1 ratio that steadily ramps up over the course of a month to one rotation every month, which would ...
Quinn's user avatar
  • 1,206
2 votes
1 answer
212 views

Clouds on a tidally-locked planet

I have an ocean world in my science-fiction universe which is tidally-locked to its star. The planet is a tidally-detached moon from one the gas giants in the outer system, and orbits a red dwarf star....
user98816's user avatar
  • 8,583
2 votes
1 answer
346 views

Geology and tidal forces on moon with Earth-life surface, but very unstable underground

I am writing a story set on a mining colony moon with some very odd geological conditions, and while this idea is admittedly likely impossible to fully make geologically plausible but I wanted to see ...
TheyMightBeGiantSquids's user avatar
0 votes
2 answers
124 views

Day/night cycle on an S-type planet

[Answered myself below] I've seen similar questions have been asked before, but the details are slightly different. Say you have a tidally-locked, roughly Earth-mass rocky planet in the habitable zone ...
DMacc1917's user avatar
  • 946
2 votes
5 answers
400 views

Could humans possibly survive on a shallow ocean planet with scarce, but large, volcanic islands?

[edited after feedback in comments] I've had an idea for a story that takes place on a planet that is primarily shallow oceans (average depth of no more than 100m or so, max depth of no more than ...
DMacc1917's user avatar
  • 946
2 votes
2 answers
120 views

How could a planet stop spinning?

Contextualizing, I'm writing a book where the planet is tidally locked with their star and i want to have a reason for that. Whatever cause the planet to stop rotating have to also cause a mass ...
Storm's user avatar
  • 49
2 votes
2 answers
253 views

Can planet with three moons, have one tidal-locked both on rotation and revolution?

I'm a new D&D 5E Dungeon Master and I've found out recently about tidal locking. For the first RPG setting I'm preparing with a friend, the planet the players will be on has 3 moons. Me and ...
Zorgatone's user avatar
  • 123
4 votes
1 answer
194 views

How thick should my atmosphere be?

I recently asked a question conserning a planet I am designing: Can my planet maintain a magnetic field after being tidally locked?. Based on these answers I determined that my planet may be capable ...
ΓΙΑΝΝΗΣ ΜΙΧΑΗΛΙΔΗΣ's user avatar
5 votes
2 answers
239 views

Can my planet maintain a magnetic field after being tidally locked?

I'm designing an Earth-like planet that has a mass of 1.9 that of Earths' and a gravity of 1.44 g. It is orbiting around a k7v orange dwarf star at a distance of 0.47 AU and with an orbital period of ...
ΓΙΑΝΝΗΣ ΜΙΧΑΗΛΙΔΗΣ's user avatar
2 votes
1 answer
226 views

Tides on a tidally locked planet

Picture the classic Earth-like tidally locked planet, with a frozen dark side, a boiling stormy light side, and a thin strip of habitable land along the terminator. The planet is similar in size and ...
MoholyNagy's user avatar
  • 1,107
2 votes
5 answers
195 views

Can my planet carry heat effectively from one side to another?

I'm designing an Earth-like planet orbiting around a K5V star in the habitable zone (the planet is at a distance of 0.41 AU). The star has a mass of 0.70 M and a surface temperature of 4,526 Kelvin. ...
ΓΙΑΝΝΗΣ ΜΙΧΑΗΛΙΔΗΣ's user avatar
2 votes
2 answers
144 views

How fast should my planet spin in order to be tidally locked?

I am designing a habitable planet with a diameter of 12.879 km. orbiting around a K5V orange dwarf star. Due to a number of planetery collisions during its creation, the planet ended up being tidally ...
ΓΙΑΝΝΗΣ ΜΙΧΑΗΛΙΔΗΣ's user avatar
2 votes
3 answers
260 views

How fast can a tidally locked planet be sped up without causing noticeable discomfort?

This question is about an Earth-like planet that doesn't rotate around its own axis. Normally the sun and moon rotate around the planet, providing a day/night cycle, but this has stopped for reasons. ...
vinzzz001's user avatar
  • 757
4 votes
1 answer
279 views

Can large stars have tidally locked worlds in their habitable zones?

I think the vast majority of space-enthusiasts has heard at some point that in order for a planet orbiting a red dwarf star to be habitable, it needs to be close enough to its parent star to sopport ...
ΓΙΑΝΝΗΣ ΜΙΧΑΗΛΙΔΗΣ's user avatar
4 votes
1 answer
350 views

Weather in a tidally locked planet's crepuscular zone

I'm currently designing a world for a project I am working on. It's supposed to be a grounded and comparatively realistic setting. The setting is a tidally locked planet in its star's habitable zone, ...
Yxylion's user avatar
  • 41
1 vote
3 answers
278 views

On a Tidally-Locked Toroidal Planet

I am developing a world, and I need to see what exactly the surface would be like. It is tidally locked at 1AU away from the parent star. It is tidally-locked via being a Torus with a major radius of ...
Zoey's user avatar
  • 766
4 votes
4 answers
297 views

Can one half of a planet be desolate, while the other half is lush vegetation?

Is it possible for half a planet to be cold, dark and lifeless while the other is a lush jungle? Can a planet be tidally locked to a sun where the jungle surface is always facing the light, and the ...
RavenclawJedi's user avatar
18 votes
7 answers
5k views

How would sleep work on a tidally locked planet?

For this scenario, imagine your classical habitable tidally locked planet: hot desert on one side, frigid wasteland on the other, and the only thing that is good is in the twilight zone. Now, assume ...
faddllz's user avatar
  • 1,822
5 votes
3 answers
168 views

A tidally-locked planet's dry ice caps

An exactly Earth-sized tidally-locked planet orbits its host star, which is functionally identical to our Sun, at an average distance of 1 AU, the same distance that the Earth orbits the Sun. The ...
KEY_ABRADE's user avatar
  • 12.8k
1 vote
1 answer
211 views

Two celestial bodies tidal locked - not with the sun [closed]

I tried to do my homework and actually thanks to this question and answer, I found myself to this site. But I just found more questions :) Basically the setting would be close to what Earth - Moon is, ...
Marbyg's user avatar
  • 13
2 votes
2 answers
106 views

tidally locked Tropical Europa

Suppose there is a heat source at Lagrange Point 1 for Europa-Jupiter sends as much energy to Europa as the Sun does to Earth. Assuming that this "artificial star" is completely sustainable ...
Bowman's user avatar
  • 619
2 votes
5 answers
402 views

Would Moons of a gas giant appear to phase when looking at them from another, tidally-locked Moon?

I'm designing a fantasy world on a tidally-locked moon of a gas giant. Because it's primarily a medieval fantasy set on the outward-facing side of the home moon, I'd like to keep units of time similar ...
xeg0's user avatar
  • 23
5 votes
4 answers
410 views

A Planet Approaching being a tidally locked planet

I am world-building an adventure for the Alien RPG. As a world approaches being tidally locked, and by this, I mean in the process of slowing down, but not stable. In such a world that no longer ...
RixRam's user avatar
  • 53
2 votes
1 answer
117 views

What are the conditions required for a tidally locked world to be in orbital resonance?

I have been looking into the orbital mechanics of tidally locked worlds lately and saw some interesting things. Namely that would-be tidally locked moons/planets can have rotation periods that differ ...
JuimyTheHyena's user avatar
3 votes
3 answers
194 views

Could a "gentle" collision of a planet into another cause tidal locking and still support life later on? What other side effects could appear?

After a few years I seem to have come back to the topic of the possibility of tidal locking on a planet with life. I love speculative biology and designing these sorts of scenarios but tidal locking I'...
SentiCarter's user avatar
  • 1,596
5 votes
1 answer
115 views

How close to a star can be a tidally locked planet so to have moderate temperature on its dark side? [closed]

So, imagine an atmosphere-less planet, tidally locked to a sun-like star. How close to the star can the planet be before its dark side becomes too hot? I imagine that at some point the rocks on its ...
Anixx's user avatar
  • 5,306
2 votes
3 answers
268 views

What if a moon orbits far away and extremely fast?

Imagine an Earth-massed moon orbiting around a Saturn-massed planet in a period of 28 days. This calculation tells me that is possible if the moon is 1.8 million km away. If so, the moon must be ...
B. T. Newberg's user avatar
5 votes
2 answers
454 views

Ring of storms around a planet

I'm looking to see if it's possible to create a planet which has constant, violent storms occurring in a ring around the planet. There's been plenty of questions on here about weather on tidally ...
Brad0440's user avatar
  • 450
1 vote
2 answers
150 views

Is an atmosphere that it's not breathable but won't damage the skin on a tidally locked Ocean planet plausible? [closed]

In my story, people are trying to colonize an Ocean planet that orbit Ultra-cool red dwarf. (Based on this Wikipedia article a planet can retain Water in this type of stars with a mass around 0.08-0....
Khalid's user avatar
  • 543
4 votes
1 answer
226 views

Air trapping polar vortexes on tidally locked planets?

There's a tidally locked planet with native life or not, but with an atmosphere that could allow a decent degree of heat transfer between hot and cold side and a rather broad, hospitable region near ...
mart's user avatar
  • 3,487
1 vote
2 answers
333 views

Would this sort of climate be possible on a tidally locked moon? [duplicate]

In the current fantasy novel I'm working on, I decided that I wanted to have a part of the planet where it was always daylight. After doing some research I learnt about the concept of tidally locked ...
Habiba Dokubo-Asari's user avatar
1 vote
1 answer
235 views

Can a planet be in spin-orbit resonance with its parent and in resonance with other planets at the same time?

Mercury is tidally locked in a 3:2 spin-orbit resonance with the sun. Other resonances like 1:1, 2:1, 5:2 can occur as well. Many objects, like the moons of Jupiter, are locked in mean-motion ...
TheDyingOfLight's user avatar
12 votes
6 answers
3k views

Do seasons occur on a tidally-locked planet?

I have done some research and so much contradict one another or I simply fail to understand. Do seasons occur on a tidally locked planet that isn't tilted on its axis?
Mister Onion's user avatar
3 votes
2 answers
123 views

How can humans actively tidal lock a planet? [duplicate]

How can humans (like that that are on Earth now) stop planet from rotating (tidaly lock it, to make an eyeball planet)? Is that technologicaly possible? Can moons of that planet help them? They want ...
galaxy001's user avatar
  • 217
12 votes
1 answer
539 views

What might be the climate inside a "sky abyss" on a tidally locked planet?

Ok, assuming a planet that's tidally locked to its sun, but is otherwise roughly similar to earth in gravity and atmosphere. Classic tidally locked planet: one side is covered in ice, the other is a ...
Monsieur Nauru's user avatar
3 votes
2 answers
187 views

Feasibilty of binary planet having life

So far I've designed two planets, and would like for them to orbit each other at a distance of roughly 1.25 million km (both planets would easily stay in the habitable zone), the smaller being tidally ...
Rebel110's user avatar
2 votes
2 answers
568 views

What kind of climates and biomes would exist on the continents a tidally locked ocean world?

Please note: I am asking about planet orbiting a star, not a moon orbiting a planet. So I’ve been trying to get this planet down for a long while now but there are still so many pieces of the puzzle ...
SentiCarter's user avatar
  • 1,596
3 votes
1 answer
537 views

Binary planets that are not tidally locked

The story takes place in Alpha Centauri, with this binary orbiting just over 1 AU from Rigil Kentaurus. The star system will tightly packed, but following the 10 Mutual Hill Radii separation setup. ...
Markitect's user avatar
  • 1,031
85 votes
8 answers
8k views

Tree Shape on a Tidally Locked World

I'm designing a tidally locked world around a red dwarf star. The habitable ring is an Earth analogue. The atmosphere and gravity are similar to Earth's, and we're going to pretend the wind is ...
Zxyrra's user avatar
  • 20.6k