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Q&A

Posts tagged sunlight

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Q&A An Earth with a permanent winter state with drastically reduced temperature, dark skies and mass extinctions

I had posted a question a couple of days ago asking if it would be possible for an artificial satellite/cosmic body at the L1 orbit to block out the Sun, but the logistics of that is a little too e...

1 answer  ·  posted 2y ago by Space_Cadet‭  ·  last activity 2y ago by Space_Cadet‭

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Q&A Harnessing energy directly from the sun via quantum tunneling

In the universe of my story, the Earth is ridden with metahumans with uncanny powers that do all sorts of different things. Of course, to do all this, they would require a tremendous amount of ener...

2 answers  ·  posted 2y ago by Strivs‭  ·  last activity 2y ago by Strivs‭

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Q&A How to explain a planet around a K-Type star with Orange/Red/Purple plants?

Basically, in a sci-fi roleplaying group I am apart of, I have began to work on a long-standing human colony world. The tech-level is pretty much bog-standard sci-fi, and such, colonisation is poss...

3 answers  ·  posted 3y ago by McGerridae‭  ·  last activity 3y ago by McGerridae‭

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Q&A Humans surviving on surface without Sun

Is it possible for humans to survive on the surface of the Earth, assuming the Sun was, for some reason, not emitting any light/heat/other radiation? Would whether the Sun was actually present affe...

2 answers  ·  posted 4y ago by Adrian Zhang‭  ·  last activity 3y ago by Adrian Zhang‭

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Q&A How would a Dyson Swarm transmit energy to the Earth?

The Dyson Swarm is common in sci fi as an energy source, and sometimes also as a powerful weapon. As it is commonly understood, it harnesses the energy of the sun, which stores a vast amount of ene...

5 answers  ·  posted 3y ago by CYCLOPSCORE‭  ·  last activity 3y ago by CYCLOPSCORE‭

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Q&A Could a person safely walk around with exposed skin under the sunlight of a red dwarf when it's not flaring?

I've been thinking about a fantasy setting built around the idea of a habitable, tidally-locked world orbiting a red dwarf. Since it is fantasy I do have some leeway in terms of the real world limi...

2 answers  ·  posted 4y ago by Vorterox‭  ·  last activity 3y ago by Vorterox‭

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Q&A What colour would a flat world's sky be?

In continuation of my previous question, I'm wondering about the colour of a flat world's sky. To recap the previous question, I'm imagining a flat world with the sun fixed relatively low above th...

1 answer  ·  posted 3y ago by Haem‭  ·  last activity 3y ago by Haem‭

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Q&A Does living without access to sunlight for extended periods have known physical or psychological effects on humans?

Humans (even programmers :-) ) are used to having some access to natural light, but in a colony in space, on the dark side of a tidally-locked planet, or underground (for example) this won't happen...

6 answers  ·  posted 8y ago by Monica Cellio‭  ·  last activity 3y ago by Monica Cellio‭

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Q&A Anatomically correct Kryptonian, part 1

Part of the Anatomically Correct series of questions. Due to the nature of Superman having so many different powers, I wanted to focus specifically on one aspect of his character: the ability to...

3 answers  ·  posted 3y ago by overlord - Reinstate Monica‭  ·  last activity 3y ago by overlord - Reinstate Monica‭

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Q&A How much sunlight can I get into my O'Neill cylinder and how much light needs to be artificial?

The cylinder is 32 km long in total, 8 km in diameter, with 3km long endcaps, resulting in a habital area with a length of 26 km (= and an area of cirka 754 km2). The main body of the cylinder is...

1 answer  ·  posted 3y ago by Backup Plan‭  ·  last activity 3y ago by Backup Plan‭

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Q&A Would living on around Alpha Centauri change how our eyes see color?

I am writing a sci fi novel in which one of the primary factions is a lost space colony sent to Proxima Centauri (Alpha Centauri C) roughly 350 years prior on a generation ship. The trip took rough...

4 answers  ·  posted 3y ago by TitaniumTurtle‭  ·  last activity 3y ago by TitaniumTurtle‭

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Q&A Can a Sunset Be Black (Infrared)?

Fact 1: The cause of a sunset is from the angle of the sunlight, because the amount of scattering increases as the light passes through more and more of the atmosphere. Fact 2: Higher frequency ...

6 answers  ·  posted 3y ago by overlord - Reinstate Monica‭  ·  last activity 3y ago by overlord - Reinstate Monica‭

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Q&A What should the approximate climate of a world with almost no sunlight be?

We are developing a game setting and, while discussing certain aspects of the it, have stumbled upon our inability to adequately account for some phenomena due to our lack of knowledge. The thing i...

5 answers  ·  posted 5y ago by Exander‭  ·  last activity 3y ago by Exander‭

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Q&A Penumbra colors of a flat earth's sun-shades

So, I have been watching a lot of flat-earth debunking videos on YouTube, which has tickled my world-building bone. So, I'm imagining a world with a sphere of sunlight-level luminosity hanging rela...

1 answer  ·  posted 3y ago by Haem‭  ·  last activity 3y ago by Haem‭

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Q&A At what time of day does the illuminance coincide with that on my planet at noon?

My planet (I'll call it $P$ for practical reasons) is 2 AU from the Sun, a distance in which it receives 25 % of the sunlight that Earth receives. This can be estimated with the Inverse Square Law:...

1 answer  ·  posted 3y ago by URIZEN‭  ·  last activity 3y ago by URIZEN‭

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Q&A A desert planet with temperate polar regions could sustain how much plant-life? Any?

One proposed type of desert planet is one in which the equator and the "tropics" are harsh, hot deserts, but the polar regions are temperate, habitable, and lush with life. You can see an example o...

1 answer  ·  posted 3y ago by cowlinator‭  ·  last activity 3y ago by cowlinator‭

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Q&A How would our skies look if our sun was a white dwarf instead?

What I'm using your information for: My planet is small, has a thicker atmosphere than earth and it's orbiting a white dwarf. The main reason I chose it to be a white dwarf is that I read somewher...

2 answers  ·  posted 3y ago by Anton Berkhoff‭  ·  last activity 3y ago by Anton Berkhoff‭

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Q&A Can there be plants on the dark side of a tidally locked world?

In my story, there is an Earth-sized planet orbiting a red dwarf, tidally locked to its parent star, with large oceans like Earth, two moons similar to ours and a thick atmosphere to distribute hea...

9 answers  ·  posted 3y ago by Johnara‭  ·  last activity 3y ago by Johnara‭

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Q&A How close to the Sun would you have to be to hear it?

Taken from this fascinating answer: The Sun is immensely loud. The surface generates thousands to tens of thousands of watts of sound power for every square meter. That's something like 10x...

2 answers  ·  posted 3y ago by Jimmery‭  ·  last activity 3y ago by Jimmery‭

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Q&A Dyson sphere with mirrors

What would happen if the entire inner surface of a Dyson sphere (not necessarily a solid shell, maybe a very dense swarm) would be coated into a highly reflective material? Let's say it can reflec...

5 answers  ·  posted 5y ago by b.Lorenz‭  ·  last activity 3y ago by b.Lorenz‭

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Q&A How to explain day is 10 times as bright but no warmer?

Set at the present day Earth, the daylight on average is ten times as bright as today, approximately 111,000 lux at noon for example and subject to geographic and the air quality etc. I am looking ...

2 answers  ·  posted 3y ago by user6760‭  ·  last activity 3y ago by user6760‭

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Q&A How far away from a Sol-class sun could a planet be and still be habitable?

In my galaxy, I need a planet that is far enough away from its star to be relatively cold compared to Earth, but not so cold that liquid water cold not exist. The planet has 2 continents, 1 northe...

4 answers  ·  posted 3y ago by The Weasel Sagas‭  ·  last activity 3y ago by The Weasel Sagas‭

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Q&A Types of life on a planet in a sun-synchronous orbit?

Basically, a sun-synchronous orbit is where one side of an object is always facing a star as it revolves around it (much like our Moon is, which is where the phrase 'dark side of the moon' originat...

3 answers  ·  posted 3y ago by Nathan Hopp‭  ·  last activity 3y ago by Nathan Hopp‭

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Q&A How do I figure out temperatures and amount of sunlight for a world?

How do I figure out the temperatures of certain latitudes on a planet with factors such as sunlight and the emission of heat and energy from a planet's interior? Assume the planet is smaller than E...

2 answers  ·  posted 4y ago by user61505‭  ·  last activity 4y ago by user61505‭

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Q&A Life in permanent shadow

I've been experimenting with a fantasy world that is flat, with the sun fixed in place over the centre. The day-night cycle is provided by the sun dimming and then brightening again. Most of the re...

2 answers  ·  posted 4y ago by Sjiveru‭  ·  last activity 4y ago by Sjiveru‭

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Q&A What stellar qualities would allow our Sun to support human photosynthesis?

I am interested in a character or race of humanoids similar to the green man in the tent in Wolfe's Book of the New Sun. What qualities would the Sun need to have in order to support a race of hu...

2 answers  ·  posted 6y ago by zzu‭  ·  last activity 4y ago by zzu‭

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Q&A Spotlight distribution in a hollow earth?

I've been toying with a concept for a hollow/inner Earth universe in which I would like to achieve an even distribution of light. The pickle is that the "sun" of this world operates like a beacon/s...

4 answers  ·  posted 5y ago by C. Waldo‭  ·  last activity 4y ago by C. Waldo‭

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Q&A Can fiber optic cables be used to pipe sunlight into an underground bunker for growing plants?

One major problem with living underground is you lose all of that wonderful energy provided by the sun. This energy is useful for many things including growing plants for food. A window is effectiv...

1 answer  ·  posted 4y ago by Erik‭  ·  last activity 4y ago by Erik‭

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Q&A Earth Orbit Extreme Change

So recently I got slated for missing some glaring obvious flaws in my story on here, which I really do appreciate. I'm approaching the question from a different angle though, in two parts. What w...

2 answers  ·  posted 4y ago by Pensive‭  ·  last activity 4y ago by Pensive‭

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Q&A Blacklight Star

Tangentially related to The evolution of neon kittens Is is possible for a star to radiate in the ultra violet spectrum but not much in the visible light spectrum? If not, is there any mechanism ...

4 answers  ·  posted 6y ago by AndyD273‭  ·  last activity 4y ago by AndyD273‭

Question stars sunlight light
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Q&A Opaque Solar Shield in Geosynchronous Orbit: Plausibility + Challenges of Maintaining Orbit

Suppose humans of the late 21st century or beyond began constructing a solar shield as a solution to climate change. Suppose for some reason (open to suggestions) they choose to build the shield in...

2 answers  ·  posted 4y ago by Irving Washington‭  ·  last activity 4y ago by Irving Washington‭

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Q&A How can a remote planet with little to no sunlight have high wind speeds?

I saw this question here: Can I have wind turbines on my base? and someone else asked about how the planet can have 60-100mph winds without very much sunlight to cause the energy differential, to w...

6 answers  ·  posted 4y ago by J0hn‭  ·  last activity 4y ago by J0hn‭

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Q&A How do I calculate the amount of sunlight a planet gets?

I'm working on a planet and I want to know what is the maximum amount of sunlight my planet gets in lux (for Earth It's 120000 lux). My planet orbits an M4V class red dwarf that has a mass of 0.2...

1 answer  ·  posted 4y ago by System‭  ·  last activity 4y ago by System‭

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Q&A Radiation Levels and Effects on Planet with 27 Suns

Other posts from this thread will be posted here: How to make an Earth with 27 suns work (Closed as a duplicate of the follow up, Attempt Two) How To Make an Earth with 27 Suns Work, Attempt Two...

1 answer  ·  posted 4y ago by FoxElemental‭  ·  last activity 4y ago by FoxElemental‭

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Q&A Are there size constraints to Time Bubbles?

I'm creating various artificial Time Bubbles in my universe where time flows faster or slower inside a specified area, typically depicted as a semi-transparent bubble. Before developing any more st...

4 answers  ·  posted 4y ago by EveryBitHelps‭  ·  last activity 4y ago by EveryBitHelps‭

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Q&A How long could the sun be turned off without overly damaging planet Earth + humanity?

Background story: Current Earth, in the close future. Astronomers have found first signs of extraterrestrial life: huge sheet-like objects (with surfaces easily as large as the surface of the Eart...

11 answers  ·  posted 6y ago by subrunner‭  ·  last activity 4y ago by subrunner‭

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Q&A Can visible light be blocked while still allowing for light for plants to survive to pass through?

What I'm thinking for this question is that some kind of filter is put around the sun by aliens that prevents some kinds of solar energy from passing through but allows other types. Like if it sto...

5 answers  ·  posted 4y ago by Sydney Sleeper‭  ·  last activity 4y ago by Sydney Sleeper‭

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Q&A Would a circumbinary planet have a differently colored sky depending on which star was visible?

One of the things that affects the color of the sky is the wavelengths of light that the star emits, like the image in this question. Here is the image again: If you are standing on a circumbina...

4 answers  ·  posted 6y ago by Pyritie‭  ·  last activity 4y ago by Pyritie‭

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Q&A How much darker could the sun get without killing off the plants necessary for the production of oxygen?

So essentially in my story, aliens put something around the sun that doesn't stop all the light from it hitting Earth, but only some of it, effectively dimming the light without outright extinguish...

2 answers  ·  posted 4y ago by Sydney Sleeper‭  ·  last activity 4y ago by Sydney Sleeper‭

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Q&A What would day and night look like in a circumbinary system?

I've been thinking of using a binary model (a planet that rotates around two suns) for a possible story. The specific model is a S-type planetary system, where the planet orbits the the primary st...

1 answer  ·  posted 4y ago by JAMS‭  ·  last activity 4y ago by JAMS‭

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Q&A A world with only sunlight and a world with no sunlight (Fantasy)

I'm curious if it's possible for human life to survive in both of the following cases: 1. A fantasy world with only sunlight (no night). 2. A fantasy world with only night (no day). Note: let's ...

4 answers  ·  posted 6y ago by The Spartan‭  ·  last activity 4y ago by The Spartan‭

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Q&A How would sunlight work in the area of shared atmosphere of a Rocheworld?

(See diagram) Presupposing that a Rocheworld can even exist... I imagine that sunlight would work more or less the same in the atmosphere of any part of an Earth like planet that was tidally lock...

2 answers  ·  posted 5y ago by Len‭  ·  last activity 5y ago by Len‭

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Q&A Inducing a Solar Flare

Is there a way to induce a solar flare / coronal mass ejection (CME)? For instance, could a very tight glob of charged particles reconfigure the the Sun's corona leading to this type of event? Is ...

3 answers  ·  posted 5y ago by Englishman Bob‭  ·  last activity 5y ago by Englishman Bob‭

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Q&A Can a habitable planet have mini-suns (i.e. solar satellites or glowing moons)?

Suns are stars. They are orbited by planets, and sometimes other stars. Planets are orbited by moons. Reasonably advanced civilizations may launch artificial satellites into orbits around their pla...

5 answers  ·  posted 7y ago by Crissov‭  ·  last activity 5y ago by Crissov‭

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Q&A Tree bark on tidally locked planets

I saw this video, and I'm curious what color bark would be if the sun was in one position constantly. The video explains that birch trees are white because of stuff in their bark. The reason is be...

3 answers  ·  posted 5y ago by GoingFTL‭  ·  last activity 5y ago by GoingFTL‭

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Q&A Perceiving color like a native

Assumptions One habitable world in each system (blue sun system and yellow sun system). The two worlds are fundamentally Earth-like. The native humanoid species on each world are genetically comp...

3 answers  ·  posted 5y ago by JBH‭  ·  last activity 5y ago by JBH‭

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Q&A The 372-Day Calendar

There seems to be a connection between orbital revolution (one year) and distance from the star the body orbits. For example, Earth orbits the sun at a distance of 93 million miles and completes o...

1 answer  ·  posted 5y ago by JohnWDailey‭  ·  last activity 5y ago by JohnWDailey‭

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Q&A Defining the perceived appearance of a moon from a planetary surface

I have a homebrew setting with a moon that has some specific features orbiting an Earth sized planet, and I'm trying to find out how these features would affect how the moon looks from the surface ...

1 answer  ·  posted 5y ago by 1312412‭  ·  last activity 5y ago by 1312412‭

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Q&A Device close to sun to focus energy to satellite in Earth Orbit for energy generation

The light from the sun is dissipated in a sphere, so there is a squared relationship between the distance from the sun. Would it be possible to place either a lens or solar collectors with a laser...

6 answers  ·  posted 5y ago by Eric Johnson‭  ·  last activity 5y ago by Eric Johnson‭

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Q&A Warming up Mars

The vast majority of the sun's energy is wasted -- the light and warmth are sent out in a spherical shape, and the planets only pick up those little bits of energy that happen to be going in the ri...

3 answers  ·  posted 5y ago by Simba‭  ·  last activity 5y ago by Simba‭