Questions tagged [day-night]

For questions regarding the day-night cycle of a day on a world. Usually regarding the dark-light cycle.

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Effects of latitudinal time zones with multi-step DST

In OTL, longitudinal time zones (each ideally 15° wide, ±7½° around each of 24 main meridians) were introduced in the late 19th century when time tables for trains, for instance, began to require more ...
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8answers
310 views

Is a dayless, moonlit, icy world possible?

I am seeking to temporarily trap my protagonists on a wasteland. The kind I wanted to create was an icy planet that doesn't experience day or night, just a constant state of moonlight. I suppose the ...
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1answer
656 views

If the Moon Titan Orbits Earth

Long ago, I made a post with a scenario on how planet Earth would be affected if our moon were the size of Mars. But I've decided that it be more reasonable if our moon were closer in size to Titan, ...
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4answers
482 views

How to explain it rains only/always when there is no daylight?

How can I explain that it only rains at night (i.e. from dusk till dawn) in a certain region? Can or must I make this meteorological phenomenon apply planet-wide? Can or must I restrict rainfall to ...
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3answers
443 views

Consequences of perpetual daytime on plants growth

What would happen if a planet like Earth were to be tidal locked to the sun? What effects could it have on lifeforms like plants? Would they always produce oxygen?
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6answers
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Could it be possible to be near-blind in daylight yet see perfectly at night?

The question is fairly straightforward but to put a bit of context: (Slice of life): I've often noticed how even though my eyesight really isn't great* I still somehow manage seeing a lot better at ...
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1answer
95 views

Largest stable object in "daily" orbit

I am considering a world with a very long light/dark cycle. However, I would like some natural method of measuring out a "day-like" period of time. Could an object with an orbital period of around ...
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1answer
752 views

Stabilizing the Temperature On a Planet With a (Very) Long Day

Let's say my terrestrial planet has a stable circumbinary orbit around two suns similar to the Kepler-47 system, in the habitable zone, with an orbit similar to Kepler-47c. The challenge here is that ...
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4answers
367 views

Strange night-day planet design

I've posted a previous question similar to this in the way that it is of my WIP web-comic. The planet my friend and I have designed is strange as she wanted to create either a permanently dark planet, ...
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2answers
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could a moon be seen during the day

Is there a way for the moon to be seen at every point during the daytime? In my world it is day all the time so they have a rough concept of months, years and days. To solve this they could have moons ...
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4answers
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How would humans be affected by a 12-hour day?

In Can I significantly shorten the days on a planet that can support human life? I asked about changes needed to a planet to support human life with a much-shorter day (12 hours or so instead of 24ish)...
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2answers
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World with two suns [duplicate]

I am going to create a new world for my DnD group as our next campaign setting. What I currently have in mind is a hostile desert world with scarce water sources and high temperatures. I wanted to ...
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3answers
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Effect of longer day/night cycle on human sleeping patterns

So in a setting I'm developing, a moon orbits a gas giant once every four days. It naturally is tidally locked to the parent body. Halfway through the day part of the cycle there is a two hour solar ...
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4answers
824 views

How far above the pole would you need to be for constant sunlight?

In theory I believe that if you moved far enough above the surface of the pole you should be able to reach an area where you have constant sunlight, even in the middle of winter. My question is - how ...
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1answer
320 views

What if Jupiter's rotational period was equal to that of the Earth?

I was amazed when I learned that Jupiter rotates on its axis once in only 9.8 Earth hours. (Yes, you can call me uneducated!) What if the rotation period was 24 Earth hours? What would change in the ...
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4answers
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How would plants be affected by a 48 hour day?

How would plants be affected by a 48 hour day, instead of 24 hour? Would plants be larger to store more energy for photosynthesis? Also, how about the temperature of the earth be different on both ...
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7answers
806 views

Is a "sun belt" realistic?

In a few science-fiction books I've read, the world that the story takes place on doesn't have a sun, but does have a "sun belt," where (instead of a regular sun) the world is lit by a stretch of sky ...
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3answers
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How could a planet have a 40 hour day cycle with its nights only lasting 3 hours?

In this hypothetical solar system the one habitable planet in question would be at center of two sun stars, one similar to our sun and the other a red dwarf. What kind of effect would this have on the ...
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2answers
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Day and night temperature on an Earth-like planet with longer rotational period

DISCLAIMER: This question was closed on Astronomy Stack Exchange as off topic, so I'll try my luck here. I'm trying to understand the climatic effects of the far future scenario of an Earth-like ...
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5answers
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Would a human individual adapt to a change in the day-night cycle?

I'm thinking on the colonizing of another planet by humans. The conditions of this planet are quite different from Earth, and particularly the day-night cycle is much larger. In my fictional planet, ...

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