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Questions tagged [eclipses]

This tag should be used when asking questions about solar or lunar eclipses in our world or in a fictional world.

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How long would solar eclipses last on my moon?

On a moon of a gas giant, there would be a substantial amount of time where the giant blocks sunlight from reaching the moon. How do I determine how long this total eclipse would be? Notes: Orbiting ...
www's user avatar
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1 vote
0 answers
92 views

How can an Earth-like planet support two moons of different sizes [closed]

In my world, I need to have two moons orbiting an Earth-like planet. I need the extreme tides as they play a big part for a cultural detail. The first moon should be roughly the size of our own moon, ...
Rey's user avatar
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0 votes
2 answers
104 views

Question about finding an exact lunar orbit

I am trying to find a precise orbit for a moon that would allow it to always be in an eclipse. So, basically, I need help finding a formula for the semi-major axis and mass ratio that would get the ...
DanceroftheStars's user avatar
2 votes
2 answers
227 views

Efficient ways to keep the moon from receding

Say we decide at some point that we'd like to keep the Moon where it is, stop its recession. What would be some efficient ways to achieve this (in terms of rate of money or energy spent)? The ...
Rohit Pandey's user avatar
1 vote
1 answer
96 views

Is there a way to find the dates that a solar eclipse happens while Ceres is in alignment with Earth? [closed]

In the game i'm working on the Earth was hit by a Coronal Mass Ejection during a solar eclipse. I'm looking for dates between 2100 and 2300 where a base on Ceres would be protected by being in the ...
Rasip's user avatar
  • 180
6 votes
2 answers
243 views

What would an eclipse with a translucent crystal moon look like?

What would an eclipse with a translucent crystal moon look like? In one of my worlds, a special moon orbits the planet — it's made of a translucent crystal, blocking only 80% of the incoming light. It'...
Firedestroyer's user avatar
0 votes
1 answer
167 views

Various eclipses in a P-type binary star system?

Trying to make a world with a P-type binary star system, with a habitable planet orbiting around them, and one moon orbiting said planet. I am terrible with physics so I've been wondering if any of ...
Rizoka's user avatar
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7 votes
5 answers
457 views

How would a crystal moon interact with light from the sun? Would a crystal moon reflect "too much" light for night time?

I have an earth-like planet in a fantasy setting with two moons, one of them made of crystal. It will be a fantasy crystal, properties TBD (probably by some of the answers to this question). My main ...
slowmomo's user avatar
  • 191
23 votes
17 answers
7k views

How does a Game of Thrones-style hyperwinter occur?

“Oh, my sweet summer child," Old Nan said quietly, "what do you know of fear? Fear is for the winter, my little lord, when the snows fall a hundred feet deep and the ice wind comes howling ...
KEY_ABRADE's user avatar
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1 vote
2 answers
277 views

Does the moon actually turn red during a lunar eclipse? [closed]

I feel dumb for asking this. I’m trying to make a scene on Earth’s moon where everything turns red, and I thought a good explanation for this would be a lunar eclipse, where the moon looks red from ...
Mark Price's user avatar
5 votes
5 answers
434 views

Is there a way for a permanent Lunar eclipse, or another Object to always be in Earth's shadow?

I have a question regarding worldbuilding and haven't found a question like this yet, so I created an account and hope that someone can answer it :D As a starting point, imagine our real-life Sun, ...
Arimeris's user avatar
4 votes
1 answer
2k views

How would eclipses change (both solar and lunar) if the moon was half the distance from the Earth?

I'm working on building a fantasy world where the moon is in a lower orbit. I've already worked out the effect on tides; 4x stronger high tides slightly further apart, increased coastal erosion, more ...
Skoby 's user avatar
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2 votes
1 answer
666 views

How would the Weather be on a Double Planet System?

context is always important to give a good answer to such a question. So here is some data and Renders from the System. It consists of the two Planets Hela and Vesna. Hela has a Radius of 5636.492km ...
Erik Hall's user avatar
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3 votes
2 answers
76 views

Frequent Solar Eclipse Cycle and Its Effects [closed]

I’m trying to imagine a sci-fi/fantasy world in which a solar eclipse occurs roughly once every 3 or 4 days. The exact frequency can be arbitrary and varied, but it does need to occur often. I would ...
Aspiring13's user avatar
1 vote
4 answers
157 views

World with frequent lunar eclipses?

I am working on a world where an event, like a celebration, occurs during every lunar eclipse. I would like to have lunar eclipses occurring more frequently--maybe even once a month--in order for ...
DVNO's user avatar
  • 227
2 votes
3 answers
148 views

Properties of a mysterious celestial body that creates a permanent eclipse on earth

Sometime in the near future, a strange heavenly body appears in the skies of Earth. Unbeknownst to everyone, it's actually the egg of a horrific, unimaginable cosmic entity, traveling through space ...
Space_Cadet's user avatar
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6 votes
1 answer
133 views

What would the effects be on a planet whose moon orbits at a speed just faster than a geosynchronous orbit, so there are more months than days?

Would anyone be able to check some math/ let me know if I'm thinking of this the correct way? I had an idea of the moon appearing basically stationary in the sky, but in fact it orbits just faster ...
StrandsW's user avatar
1 vote
1 answer
143 views

Living on a moon with an atmosphere, how would the planet interact with the sun in the sky?

I am curious that if there were a gas giant sitting close to a red dwarf with an Earth-like satellite orbiting it: How could we determine the way the planet appears in the sky and the way it ...
Shawn's user avatar
  • 39
7 votes
7 answers
439 views

Always night in one hemisphere. Is it viable?

I am building a world where one side of the planet has normal progression of day and night whereas in the other hemisphere it is always night. At first I had no idea how this could be possible in the ...
Miguel NoTeimporta's user avatar
-2 votes
1 answer
238 views

Is it possible to calculate how long a moon takes to orbit a gas giant?

if it takes the moon 6 months to pass through the gas giants shadow? Assume it is distant enough to not be tidally locked. The gas giant is 112.5 AU from the star. The star is 55 solar masses. It ...
Pentallion's user avatar
11 votes
2 answers
553 views

How long would this eclipse last?

For a moon orbiting a gas giant which is in turn orbiting a star, I want to know how long the eclipse would last for an observer standing on the moon when the planet passes between the moon and the ...
Harthag's user avatar
  • 4,123
13 votes
11 answers
2k views

Make solar eclipses exceedingly rare, but still have new moons

Given a system similar to the Earth/Moon/Sun system, how would one go about making solar eclipses rarer than they are here on earth, but keep new moons similar to how they currently are (or at least ...
Cristian C.'s user avatar
2 votes
1 answer
307 views

Longest possible eclipse in double star system

I have a planetary system that consists of two close stars: A Sun-like star - small but bright A much larger, but much darker star (about 5-10 times larger) A habitable planet orbiting both of the ...
Miki's user avatar
  • 21
5 votes
4 answers
156 views

Small eclipse on earth

Could one make a smaller eclipse kept stationary on the surface of the earth in order that one may be able to see the stars 24/7 from one site? How could this be achieved? Geostationary satellite ...
Chris Francis's user avatar
0 votes
1 answer
150 views

Temperature on a bulls-eye planet planet orbiting a red dwarf star [closed]

I recently attended a talk on current research into exoplanets and it got me thinking. I want to create a setting on a tidally locked eyeball planet for a futuristic sci-fi story. What I want to ...
Zoe D.'s user avatar
  • 85
7 votes
1 answer
507 views

A self-eclipsing orbital ring

A common, matter-efficient science-fiction habitat is a hollow cylinder or ring in space that is spun to simulate the pull of gravity on its interior surface. These habitats have been imagined as ...
Mike Nichols's user avatar
  • 13.8k
4 votes
6 answers
421 views

How would I make a moon appear black in a night sky that has a nebula visible in it?

So, I'm developing a world for my fantasy setting, but I thought it'd be neat if this particular world had a nebula visible in its night sky. (So, it might not be a nebula like the kind we have in ...
user avatar
2 votes
2 answers
375 views

How long does it take for an eclipse to cause the ocean surface to freeze?

I am working with a story. I wish to make my story somewhat logical by adding some science and thereby not making it to appear fantasy. This story is on a fictional planet far away from Earth. Let's ...
Peaceman's user avatar
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2 votes
5 answers
521 views

What would happen to Earth if it were eclipsed for nearly 10 days?

What would be the major changes that could happen if Earth experienced a solar eclipse caused by a fictional planet for a minimum of 10 days? Mainly what would happen to the oceans and flora in such ...
Peaceman's user avatar
  • 803
7 votes
2 answers
341 views

How can I lengthen a total solar eclipse on an earth-like planet?

I was lucky enough to witness the total solar eclipse crossing the US this past August, but while it was impressive, it was also fairly short - lasting just under two minutes at my location. I'd like ...
Troyen's user avatar
  • 185
7 votes
2 answers
362 views

What would the Total Eclipse look like on a planet with rings?

The recent total eclipse, got me thinking about how it would look in my world. I have a earth-sized planet with a ring system, a couple of small moons and 1 or 2 bigger moons. How would a planetary ...
EveryBitHelps's user avatar
5 votes
2 answers
4k views

Could 2 eclipses be visible simultaneously in the same area?

I just got to see a solar eclipse today, not total but 86% eclipsed. And hopefully I will see a total solar eclipse in Toledo, OH in 7 years. But this eclipse inspired me to ask this question. I ...
Caters's user avatar
  • 4,169
5 votes
5 answers
539 views

How could the government trick the entire world into thinking there will be an eclipse when there isn't?

In my story, the government is looking to get as many individuals as possible outside. Is there a way to convince the population that there will be an eclipse or some other astronomical event without ...
kstuckey's user avatar
  • 153
2 votes
2 answers
550 views

How long is a solar-solar eclipse in a Binary Star System?

Preamble: I have read this thread on single gravity well binary system eclipses. And this one on binary system views. And this one on a gas giant's moon's solar eclipse. And (now) this one on seasons ...
AndrewLH's user avatar
6 votes
1 answer
505 views

Please help me calculate acceptable planet sizes & eclipse shadows cast by my binary planet system

I've been reading here for a little while, but this is my first question. I am trying to come up with either a concrete set of numbers for a single answer for a binary planet system, or a simple ...
castinbronze's user avatar
10 votes
5 answers
388 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 ...
scicurious's user avatar
4 votes
2 answers
532 views

What would make an earth-like planet have a solar eclipse everyday?

What would make an earth-like planet have an eclipse every day? does it need additional moons and what would happen if it had those? A Total Solar eclipse across most of the planet's surface
Akil Ryan's user avatar
19 votes
4 answers
2k views

Earth-like Moon around the Gas Giant. Eclipse length?

Worldbuilder in dire need! I'm trying to figure out the eclipse length of a habitable Earth-like moon that is rotating around a gas giant. The story that I work on is centered on the Earth-like moon, ...
Jotunn's user avatar
  • 616
-3 votes
2 answers
251 views

Volcanic winter related to moons?

My Kepler Bb planet has 4 moons and is habitable. So that is good. But all 4 of these moons are major moons which while indeed possible, could be a problem. You see, these moons are in resonance so ...
Caters's user avatar
  • 4,169