Posts tagged planets
I have a planet with a specified sidereal day and sidereal year, and a solar day. But how can I determine the length of its solar year from this? Sidereal day: 1d 1h 52m 11s Solar day: 1d 1h 54m ...
So I am building a tidally locked world, but I want the shadow zone to vary a bit. One way to achieve this is through axial tilt. A planet with orbital period = day period, so tidally locked and 0...
The Rygyphae are a species that lives in the geothermal pockets, areas heated by volcanic activity. The rest of the planet is nothing but frozen ice and rock, but these pockets are lush jungles ful...
The Planet The Planet I'm speaking of has the same size as earth but is much lighter. That's because the "Upper Mantle" is about 1000 km wider and mostly consist out of organic material. Such a hu...
I'm envisioning a series of moons in orbit of a super-earth (ideal) or gas giant. If technically workable, the super-earth would have earthlike gravity, the mass and size aren't important. If it's ...
Is there a toxin which could plausibly exist in the atmosphere of a planet, which could make people sick but not too sick? Is it possible that plants grown in the soil from this planet might be ab...
I remember reading somewhere that some intellectuals from the medieval period thought the equator would be uninhabitable because it would be too hot. That made me ponder about a worldbuilding idea ...
A planet orbiting an Red m-dwarf is tidally locked to its sun. Can it have a satellite which is not tidally locked to the sun? Also can the satellite be tidally locked to the planet ?
So this planet enters our solar system from the 'south' pole at 30 kilometers per second. A bit faster than the first Interstellar asteroid ever discovered. Of course, it plunges into the Sun's ph...
I have created a planet called Betiler. I don't want Betiler to be in a classic space system like a star and some planets. So I put it around a white hole called Phulom. In my world, wormhole doesn...
What would have to happen for a giant tidal wave to wash its way around an entire planet? The planet can be like earth, with the same size, mass, and everything else. However the wave must start wi...
My empire's flagship, the Persecutor class UJBHE1 Abhorrent, rides into the home system of my greatest enemy, Baron Obsequious, levels its Death Ray2 at his beloved home, and pulls the trigger.3 B...
So, I was reading this article about how difficult it would be for any alien race to escape an exoplanet with about 10 times the mass of Earth. It states they probably would even lack satellites. ...
Would two moons of equal size and distance on opposite sides of a planet counteract each other's tidal pull?
Is a planet with varying fields of gravity possible? Yes. Earth has varying gravitational fields at various different times due to various factors, mainly location based. How extreme can I make th...
In both fiction and non-fiction worlds, that attempt to keep a sense of realism, planets are spherical. Is it possible for a planet to not be shaped like a sphere? If such a planet is possible...
Is there some astronomical / physics reason why it would (or would not) be realistic to have more than one "larger-than-Earth-moon" object in an alien sky as backdrop to a movie or tv show? In oth...
Suppose there's a planet in the habitable zone of a class F star, a bit smaller than Earth and about the same density, with 80% of earth's gravity. How far away from the planet would a brown dwarf ...
What are realistic time-schedule expectations for far-future terraforming and developing earth-like plant and animal/fish/bird populations on distant planets, by means of robotic space probes with ...
Let's say there's a habitable planet somewhere, covered with very deep cool water ocean. By very deep I mean thousands of km, but the exact numbers don't actually matter. According to water's pha...
Cosmology since Einstein makes it clear that it's not quite right to say one body in space "revolves around" another, right? Einstein wrote: "The two sentences, 'the sun is at rest and the earth mo...
I'm creating an Alien race based on Silica-Quartz crystals. While their planet is inhospitable to humans, the tectonically and volcanically active surface has created an abundance of crystalline fo...
If we had an earth like planet except it had a 50 - 100 percent bigger radius than our earth what are some ways that it could have have similar gravity when compared to our own planet? P.S. Atmos...
I'm trying to work out what the sky looks like on an Earth-like moon, in particular the length of day and apparent size of the other celestial bodies: the gas giant's size, the gas giant's other mo...
Asked a similar question before but didn't think it through and mangled it. Anyway would it be possible to build a structure between two star systems? Basic scenario is that you have two stars su...
The world in question is an Earth-sized planet with a deep global ocean and core of water-ice. Given the lack of an accessible sea floor to root oneself to, how would a complex free-floating organ...
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...
To build another world, I would want a perfected atmosphere that would sustain the air cycle and yet optimize a decreased cellular degeneration. i.e.: increase quality and length of life. Would ...
I have been wracking my brain with this one. I'm writing a story where a number of alien races who are unable to leave their homeworld for one reason or another send probes into space out of sheer ...
Background: I am designing an RPG world where the main characteristic is that a large fog has covered the entire fantasy planet. At the time the fog was released it was a mutating killer fog that ...
Assuming our current knowledge of exoplanets which star would you send a colony ship. Assume you a maximum range of 40 light-years. Earth is no longer habitable so the ship is simply playing the n...
An alien entity fell in love with Earth a long time ago. When he came back to her, she looked different. He would like to return Earth to her Hadean eon when she was much hotter. This entity has ...
I'm currently working on a conworld that has never had any contact with Earth, and I'd like to create words for iconic gemstones, such as rubies, emeralds and sapphires. However, I can't help but ...
From what I've read, planets orbiting red dwarf stars would most likely be tidally locked. Under what circumstances might this change? For example, if a planet had been the recipient of some kind o...
This is a purely hypothetical question but I can't find a satisfactory answer to it. Let's say somehow Jupiter collects enough mass to be considered a brown dwarf. Let's assume Jupiter achieves a...
The question popped into my mind when I read this. Since we know our scientists are searching for planets which might be capable of supporting life; most of them many light-years away, could the...
If I had complete control over the plant's appearance, what would be the best shape for it? I need the plant to be able to float between the clouds. It doesn't have to spend its whole life cycle f...
Beforehand: I must excuse my english. It's not my native language. Neither take this question too seriously. It's a stupid concept and I don't think that I will keep it by. It's just very "cool" t...
My story revolves around a group of human astronauts exploring various planets via a new revolutionary type of drive. One of the planets I'm envisioning is a Cold Super-Venus, i.e. larger in size, ...
I want to build a world where one planet could be visible from the sky, day and night with the naked eye periodically (like Earth's moon behavior) and not everywhere at the same time (since my worl...
My question involves the earth being blown up using theoretical dark energy. In this scenario, the crust and mantle are destroyed by precisely placed weapons so that all that remains is the core. W...
I read somewhere that the lowest depth for a sustainable underwater habitat is estimated to be three-hundred meters. Any lower and the pressure becomes too great for structures that are currently w...
Language revolving around the Sun would probably not be used on a planet with a different star, right? For example, if a planet was orbiting Sirius, "siriuslight" or "siriusburn" seems a tad clunky...
Could a natural satellite in geosynchronous orbit be used as a counterweight for a space elevator? Does the counterweight need to be of approximately the same weight as the anchor? If so, I suppose...
I have been designing a whole solar system for my story, and I am finally able to come down to creatures on the planets. I have already asked a question about one of the planets, Veynerth, so there...
I'm trying to build a world that is orbiting a red giant but sustains life similarly to the conditions of earth.Since red giants are about half the temperature (3000 kelvin) of our sun (6000 kelvin...
I am writing a story, and it takes place in a solar system way far off from our own. One of the planets, Veynerth, is a dry, deserty planet, but in certain areas there is high volcanic activity. Ho...
In a story I have been working on, there is a planet called Ieuclite. I want to have its surface be entirely covered in ice and have the people live in cracks and fissures. But then I thought, what...
The planet I have in mind is slightly larger than Mars and is located in the system behind a planet about twice the size of Earth. The effect being almost like a solar eclipse that happens daily (...
