Questions tagged [moons]

For questions pertaining to natural satellites, such as our own Moon.

Filter by
Sorted by
Tagged with
10
votes
4answers
3k views

Could we mine the Moon if we replaced the taken mass?

There is the strong theory that the Earth and the Moon were part of the same core at one point. This would lead one to believe that there are precious minerals under the surface of the Moon. Metals ...
10
votes
16answers
943 views

How can I discourage parents from exploiting celestial events?

The moon has an effect on the mana content of an individual. During high tides, a person's mana increases and becomes more powerful. This is the time in which more powerful spells can usually be ...
10
votes
4answers
2k views

Could we use both speed and heat to penetrate Europa's ice?

Could we fire a heavy, long (e.g., 50 meters), spear-shaped object into Europa's icy-surface from space and then, when momentum stops, gravity gradually moves weights down inside copper tubes the ...
10
votes
3answers
2k views

Can a planet still function with a damaged moon?

I'm thinking of having a world that has a moon that's been partially split (so not fully halved) with the debris slowly separating from it. At night you'd see the split moon mainly and lots of ...
10
votes
3answers
454 views

Could I use a series of magnetic asteroids to create a magnetic field for mars?

If I push a couple of magnetic asteroids into mars gravitational field, could they form an interlocking series of magnetic fields able to protect mars from solar winds? Size limits for asteroids is ...
10
votes
6answers
509 views

The impacts of the Moon's limited gravity on the design of a Moon city's transportation network

In the near future mankind could well permanently settle on the Moon. Whether for research or mining or just good old fashioned novelty is irrelevant. The colony includes: Large domed structures ...
10
votes
4answers
486 views

A brighter moon that's harder to see

In honour of the full moon an odd moon question for you all. The idea is to create a situation in which the inhabitants of a world believe utterly that the moon only exists at night. I'd also like to ...
10
votes
3answers
1k views

Realistic Timespan of Cargo Delivery between the Moon and Earth

Assume that Amazon has set up a processing station on the Moon for whatever motive as a way to ship things out to space (Mars, etc.) faster and more efficiently. How much time today and perhaps in ...
10
votes
5answers
555 views

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 ...
10
votes
6answers
568 views

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 ...
10
votes
6answers
1k views

Giving a Planet Sunburn

How can I make a colonizable planet/moon that receives intense UV/x-ray radiation on parts of its surface while receiving much less on the rest of it? The most obvious way of doing this is to have the ...
10
votes
1answer
1k views

Appearance and effects of a 200 mt fusion bomb explosion on the moon

Let's suppose that a fusion bomb device with a yield of 200 megatons (4x Tsar Bomba) is detonated in Mare Tranquillitatis on the Moon. My question is: Would the explosion be visible from Earth at ...
10
votes
5answers
388 views

Eye in the Sky Effect

Is there any conceivable way that a planet with two moons--one being visibly red to the naked eye due to its mineral composition--could align in an eclipse in such a way so that the whole effect looks ...
10
votes
2answers
856 views

Could an asteroid aerocapture around Earth?

Would it be possible for an asteroid in solar orbit to go near enough to the Earth that the Earth's atmosphere slows it down into an orbit that is, aside from its low perigee, stable without using a ...
10
votes
3answers
973 views

Details needed for day cycle of lunar world orbiting a gas giant

I'm writing a science fiction story set on a moon orbiting a gas giant. I want to understand how the world's day night cycle would appear from its surface and how the world might be affected by this ...
10
votes
4answers
3k views

Would it be possible for an Earth-like planet to have multiple moons with diverse biomes capable of supporting life?

Thanks for taking a moment to help me understand the feasibility of this scenario. Essentially, what I am looking at is an Earth-like world that would be between 1.3x and 1.6x the mass of our own ...
10
votes
1answer
487 views

Moons in Binary Orbit

Writing a werewolf story, and decided for a bit of flair, so I wanted two moons in orbit. Did a bit of digging, and I found out that to do that, I'd need to either have them in separate orbit (no ...
10
votes
3answers
310 views

Lifetime of the Moon's moon

Imagine if the Moon had its own moon. A moon (likely an asteroid) that lies within the Moon's Hill Sphere. I have read elsewhere about the fate of such a moon. Over time due to the Moon being tidally ...
10
votes
5answers
322 views

Effects of regular prolonged eclipses on environment

What would be the effect on climate on an Earth-like moon of a gas giant, which experienced regular ("monthly") total solar eclipses (by its gas giant parent) lasting approx. 40 hours. I'm trying to ...
10
votes
3answers
573 views

What's a Good Sphere-Mapping Resource?

After reading the help sections for asking questions, I am now confident that my question does in fact appear to be on-topic and in scope for this website. I currently use a page called PlanetMaker ...
9
votes
4answers
2k views

Moons that can't see each other

Could 2 moons that orbit same terrestrial planet never see each other if they orbit the planet at same time? Moons have different mass and gravity.
9
votes
4answers
2k views

Making the Moon brighter with talcum powder - how much brighter could it be?

A future nation wants to make the Moon as bright as possible in order to save massive amounts of night-time electricity on Earth at certain phases of the moon. The plan is to coat the Moon's surface ...
9
votes
4answers
1k views

How Do We Keep The Moon From Eating The World?

In 2053 a manned mission to the moon, using seismic sensors, discovers that it is not a natural satellite*. The moon is actually an egg of Vespula ludicrousmegagiganto. Note that the name is not ...
9
votes
4answers
3k views

Would a base on the moon (military or otherwise) actually prove useful?

I watched Independence Day: Resurgence the other day. In it, Earth's first line of defense is a lunar base (that gets blown up), followed by an orbital satellite network (that gets blown up). Now, ...
9
votes
2answers
1k views

Earth as moon of Jupiter

I'm making five habitable planets the size of earth as moons for a gas giant the size of Jupiter. Then I want to add many more smaller moons, Our Jupiter has 67 moons, I want as many small moons ...
9
votes
4answers
306 views

How can an Earth-like moon meet these angular diameter conditions?

NOTE: If there is anything about this question that needs clarification or editing, please don't hesitate to let me know in the comments. Get ready, because you're in for quite a ride. I have tried ...
9
votes
3answers
326 views

How Can I Explain a Giant Equatorial Gash?

I have a moon in my story that has a thin, deep gash or canyon that lies on its equator and spans the entire moon. My original idea involved the sudden orbital decay of a ring system, caused by a ...
9
votes
2answers
839 views

How large can an apparent size of a moon be?

In a lot of media one can see moons or other planets that cover a significant portion of the sky (like the background on this page for example). This could be because the moon is actually large or ...
9
votes
3answers
1k views

Predicting lunar eclipses with multiple moons

I realize that creating worlds with multiple moons and/or suns is risky, but I'm toying with an idea to see where it goes. So, a planet has 3 moons. One is large like ours, the second is about half ...
9
votes
4answers
2k views

Can we build a space elevator on the Moon with present technology?

We have all heard about the idea of space elevators, a cable so long that it literally reaches into outer space, to be used for launching payloads cheaply into Earth and interplanetary orbits. However,...
9
votes
3answers
317 views

Would a destroyed orbital body's orbit decay?

I recently finished reading the novel "Seveneves" by Neil Stevenson. The central premises of the novel is that an unknown object has caused the moon to break into several large pieces, with an ...
9
votes
1answer
283 views

To make a blue moon, what element does it need?

We know that Mars has a reddish color, because its ground consists of iron-based compounds. The moon is grey-whiteish because it consists mostly of silicon-based compounds. What element should the ...
9
votes
3answers
328 views

Habitable environment on a big moon of a gas giant lacking magnetosphere

I am trying to figure out how to make a moon (75% of Earth size) of a gas giant habitable. To give an idea of the technological level, here are technologies the colonists have access to: fully ...
9
votes
1answer
442 views

What would weather/geographical conditions be like on a tidally locked moon?

I'm trying to figure out what weather patterns and geographical conditions would exist on a habitable moon that is tidally locked to a much larger planet/gas giant. From my research, I was able to ...
9
votes
2answers
526 views

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,...
9
votes
2answers
548 views

Architecture of richest person's house on the moon

Background Several hundred years from now, humans have successfully terraformed the Moon. It has become a fad for the rich and powerful to have exotic residences built in exotic locations. The ...
9
votes
1answer
297 views

Feasibility and consequences: the cosmic dance of twins habitable moons

I am aware of being a newbie in the field I am asking my question... please be kind and explain what I did wrong if I make a mistake. The idea from where the problem bloom I love worldbuilding. ...
9
votes
1answer
539 views

Brown Dwarf Star vs Gas Giant as parent for habitable moon

I seek to build a habitable moon of a giant planet, thus I looked at the Rouche Limit Equation to figure out how to get the biggest possible Hill Sphere for my moon to exist in. $r_H = a(1-e)\sqrt[3]{...
8
votes
7answers
1k views

Could I have an earth-like planet from which sun and moon would never be simultaneously visible?

On earth there can be hours where the moon is up during the same time the sun is in the sky (daytime moon) due to the combined rotation of earth and orbit of the moon. I would like to have an earth-...
8
votes
2answers
2k views

If the Moon was made of cheese, what should we do with it? [closed]

The Moon is made of cheese. So: Should we eat the whole moon or should we keep it until the famine breaks out? Will the moon melt or freeze or neither? Can you still eat the cheese after a while or ...
8
votes
4answers
2k views

Farming on the moon

Let us assume that I built a dome on the moon's surface. That dome is pressurized and has nuclear-powered lights to deal with the long lunar night (or is in one of the poles). I also have water, ...
8
votes
3answers
745 views

What could be the largest geosynchronous moon?

If we consider a planet with the same characteristics as the earth, (diameter, mass, rotation period) what would be the maximum possible diameter of a moon on a geosynchronous orbit? Considering the ...
8
votes
3answers
2k views

Conditions needed for a Fractured Moon

After seeing the film Oblivion I began wondering about what would happen if the Moon was fractured in such a way that large chunks of the Moon were ripped apart. Would the chunks of Moon stay in ...
8
votes
3answers
538 views

How to blanket moon with a permanent atmosphere?

There exist numerous theories on why the Moon lacks a layer of air if any, however the main culprits are gravity and the lack of Geo-dynamo simply put the Moon does not have the necessary mass nor the ...
8
votes
3answers
300 views

Which moon is most favourable as a refuelling station?

My hypothetical gas giant has five major moons. Three of those moons are icy bodies with abundant water ice and volatiles. Any of these could provide fuel for translunar spacecraft, or for spacecraft ...
8
votes
2answers
448 views

What would an asteroid impact feel like to someone standing on the moon?

On the Earth, with our atmosphere, even small objects entering the atmosphere such as Tunguska or Chelyabinsk can do devastating damage due to the shock-wave travelling through the air. People could ...
8
votes
3answers
294 views

If you melted Europa's ice would there be any land?

First question: if you melted Europa's ice, would there be any land? Second question (assuming the answer to the first question is no), how much water would you have to remove after that in order to ...
8
votes
3answers
302 views

Is this planetary moon's calendar possible?

I'm attempting to create a world that has very brutal, hard swinging weather and environments, leaving much of the planet desert-like. The world I've designed is a moon of a gas giant. The Parent ...
8
votes
3answers
469 views

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 ...
8
votes
4answers
274 views

How would the absence of tides influence the geography of a tidally-locked moon?

On Earth, the presence of tides due to the Sun and Moon influence certain currents and other movements of water. This in turn leads to different forms of erosion, which can transform a landscape. I'm ...

1 2
3
4 5
12