Posts tagged planets
So say there was a rogue gas giant about the mass of Jupiter that, unfortunately, happened to be headed directly at Earth (or at least close enough to knock it into an orbit incompatible with life)...
The basic concept of this planet is that, the planet has a tilted axis (you probably guessed that already) which results in the South Pole constantly facing towards the sun. This would result in th...
I want my planet to be the last planet in a universe to host life forms. I expect a rough estimation as answer. Thanks.
Earth's atmosphere, as you probably know, is divided into five layers - the troposphere, stratosphere, mesosphere, thermosphere and exosphere. https://en.wikipedia.org/wiki/Atmosphere_of_Earth#Str...
I would like to destroy a Dyson Sphere so it leaves big chunks of scrap metal with no habitable zones left, but still with enough structure to hold building-sized blocks. The destruction shouldn't...
In our world, a solar eclipse is visible from the planet a few times a year, in certain locations. However, a total solar eclipse that can be seen across the planet generally happens every three or...
For a certain reason, I needed two habitable similar earth-like planets very close to each other. After various information gathering, I gave up on double planet and gas giant moons, because tidal ...
The moon is made up of a substance called warpstone. This rock is solidified Mana compressed into physical form. Pieces of the moon will sometimes fall to earth, which contain magical properties an...
I'll need to give some background to this question. I'm interested in the idea of a densely inhabited star system, and having large exomoons is one way that they can all orbit roughly at the same p...
Art by Sylvain sarrailh What kind of event would we need to have 1km deep fissures spanning out across the planet. I can work with a hypothetical scenario where the planet might have had some sor...
In the world my friend and I are making, the dark lord makes one of the planets uninhabitable by causing a moon, about the size of our own, to fall on it. About 7000 years later, it is unnaturally ...
I am looking at different ways to destroy a planet. I am assuming the planet is of a similar size and composition to the Earth just to keep things simple. I am starting at boiling the atmosphere t...
I am wanting to make a 3 world lagrange system around a Sol analog star that includes 1 gas giant and 2 terrestrial worlds with large moons. I want the terrestrial worlds to have a similar gravity ...
We all know the tale of Jack and the Beanstalk--a farmboy sells his cow for some "magic beans", which in turn grow into a mountainously tall stalk that led him to the land of a giant. Now, scienti...
I've been using this helpful diagram a lot for worldbuilding. Now I came to think about the fact that helium is more massive than hydrogen, thus a scenario where hydrogen escapes, but helium is ...
The planet needs to be able to support life but initially ve devoid of it. Which I would think would make it's Soil like that of a desert. The regolith may be important for early agriculture. It ca...
This character has a set of dragonfly-like wings. These are not normal for her species, and would normally be something of a birth defect requiring amputation. But through liberal application of Cl...
In my previous question, I asked about how close can two stars in a binary system be for planets around them to stay earthlike, assuming that both stars have very sunlike and both planets very eart...
The planet is 10 Earth-Radii, with a 1 Earth Gravity value. It is a habitable planet. It has a thin atmosphere. It also has 3 moons and a ring system. The moons are rather large. The largest one i...
I'm developing a story where humans colonize a few planets. One planet, lets call it Planet A, has similar gravity to earth, air pressure, and solar radiation. You cannot however, walk on the surf...
Suppose I want to have a moon with more gravity than ours how large of a moon can I have and what effects would there be.
I know that red dwarf stars are dimmer than ours. But I also know that red dwarf stars emit a lot of infrared light, so creatures on a world orbiting it would have eyes that see infrared light. I...
I'm working on creating a planet that is tidally locked to a red dwarf, which is in turn orbiting a main sequence star which is much further away. My idea is that the tidally locked side of the pla...
On this planet, there is a nomadic tribe of humans who are the descendants of unwilling colonists from thousands of years prior. They are a nomadic tribe because of the incredibly extreme seasons, ...
I've been wondering about this for a while. Here is the research I've done so far that lead me to ask this question: A planetary ring system is most often formed by the breakup of objects within ...
How long will a 400 km wide 30 km deep pit (trench or crater) with a relatively shallow (for stability) gradient of slope of 20 degrees from the edge to the surface of the planets crust be expected...
I was looking through a bunch of different ways we can shape a map of the Earth and it got me thinking. We map out planet as a stretched rectangle with NSEW as Up Down Right Left, with the Equator ...
In the story I'm working on, a rift in space time opened up between our world and a layer of oxygen in a gas giant at some point in the past. Eons earlier, a species of fish symbiotically linked wi...
as the title, is there a way to levitate entire body of water in earth and make it stay in the sky (not cloud and still in liquid form) ? either natural or man made. the water either flowing or c...
This is completely ignoring the fact that lifeforms that aren't based on carbon are entirely hypothetical. Could these lifeforms breathe oxygen like us, or would they need to use some sort of techn...
Here on earth, it takes about 90,000 years for major ice sheets to build up, and another 10,000 for them to collapse, resulting in 100,000 year cycles of major glaciation, from what I understand. ...
A scientist is resetting the clock on his microwave one day as he considers the hopelessness of keeping the time exactly right. Not for the reasons we worry about like power outages and daylight s...
The metric system (SI units) is a base-10 measurement system based on the meter, kilogram and second. But it is tied to earth. A second, which historically was defined as 1/86,400 of a day, now d...
as the title say my question is: What planet composition is need to have giant human that make earth human similar in comparison to ant size to them? i know realistically and probably its imposibl...
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 t...
I'm trying to develop a realistic system with a limited understanding of astrodynamics. Is it possible to have two binary worlds capable of sustaining atmosphere and complex life orbiting one anot...
I have some research that it needs a good space suit to protect you from heat and cold but I need more so, what does planet mercury need to sustain life for humans? what could we as humans do to ha...
The length of a day on different planets in the solar system varies a lot. For instance, Mars' day is about the same length as Earth, while a day on Venus is equivalent to 243 Earth days (source). ...
I have a K-type star (0.5 stellar masses) as the central body, and the planets are as follows (those I want to be in the habitable zone in bold): I: An uninhabitable rocky inner planet 50% the mas...
As asked in the title, what would be the upper limits to a rocky planet's size in orbit of an O type star, like 10 Lacerta's habitable zone? Density of the planet must be enough to stand on without...
Carbon dioxide turns supercritical above a pressure of 73 atm and 304.25 K (31.10 °C). The surface of Venus fullfils these conditions. The density of the air at the surface is 67 kg/m3, whi...
I've been recently looking into alternative biochemistries for life and the environments were these could be found. I already asked a question about how ammonia oceans might form a while back. Toda...
After what feels like forever and after asking several questions (like this, this and this), I believe I may have decided upon a suitable orbital system for my world: $M_{S}=2.272\;571\;144\;5 \...
Would it be possible to have a planet created by a God - but still obeying the known laws of physics - to have a bouncy surface that would be strong enough to bounce any large incoming matter, like...
I know that gas giants are much larger than terrestrial planets, but wouldn't several million or billion years allow for it to gain mass from collecting space debris and the like?
How would a planet need to be changed (gravity, air pressure, air makeup, etc) to allow for the realistic flight and take off from a small hill of a gryphon with a human rider? You can assume the ...
If the Earth all of sudden was instantaneously transmuted into pure light, what would happen? How much energy would be released? How much damage would it do to surrounding space? Would it destroy...
I am working on a planet were life (trees, plants, food, animals, humans) would be bigger/taller than Earth. I have learned that oxygen level or gravity, for example, could help change the size of ...
Hello I imagine this is a pretty straightforward question, perhaps already covered in another post, but I wanted to get extra perspectives and options for achieving this type of planet or moon. So ...
My story takes place on the moon of a large gas giant planet. I have been trying to decide on a way for the moon to be as Earth-like as possible, but I have now decided to ask the community for hel...
