Questions tagged [earth-like]

For questions regarding planets similar to Earth in most respects. This tag should be used when describing a planet that follows the rules of Earth with exceptions outlined in the question. Usually questions using this tag will be about the differences and the impacts of those differences.

Filter by
Sorted by
Tagged with
4
votes
2answers
105 views

How to construct an Earth-like world with very high wind speeds

I want to create a world where humans can live outside (perhaps with some protective clothing) but where very high winds exist in almost all potentially habitable areas making life outside impossible ...
2
votes
1answer
137 views

One half of my population was eliminated. How do I restore them without causing havoc? [closed]

A few years back, the Evil Overlord magicked away half of the world population - they were effectively locked away in time, for all intents and purposes. Then, against all odds, the Super Team was ...
12
votes
3answers
303 views

What would the geologic record look like on a planet in the galactic halo?

Imagine an Earth-like planet orbiting a Sun-like star in the inner halo of the Milky Way. As a halo star, it will likely be somewhat metal-poor, having formed early in the life of the galaxy, but ...
4
votes
6answers
306 views

can human sized humans feasibly live on an immortal dead human the size of Earth?

it sounds like it's an impossible thing, but what i mean is that the immortal is dead, but its body isn't decomposing. it has about the same atmosphere as earth as well. it could be curled up into a ...
9
votes
8answers
9k views

If people were the size of cats, and the land was scaled down accordingly, what would the size of England be?

So imagine people were the size of house cats, and the world's land masses were scaled down accordingly (in volume). In comparison to the original size of the landmass, how big would England be? And ...
5
votes
1answer
100 views

How to have hollows with complex plant and animal life on a planet

This is a slight continuation of my other post where I was trying to create realistic hollows with weather due to temperature changes due to bio minerals called Hearthstones. I was wondering if plant ...
25
votes
19answers
7k views

Would common people in central Europe in the 15th century notice that the whole Asia disappeared?

We have earth at the beginning of the 15th century, and suddenly the biggest continent disappears. There is nothing left of it, no animals, people, lands, anything. I don't think the details of the ...
4
votes
2answers
109 views

How does composition change if you extend an Earthlike atmosphere 50km below sea level?

I'm working to design the atmosphere of a fictional planet inspired by Venus (let's call it Cael). Cael's atmosphere at an altitude of 50 km is essentially identical to Earth's atmosphere at sea ...
2
votes
3answers
174 views

Near-future weapons taking designs similar to 17th century weapons

I am doing an alternate-history of Earth going into the science-fiction area. The split came with a portal to a new planet appearing around the 17th century. The portal deposited those brave enough to ...
4
votes
2answers
217 views

Penguins in the Not-Arctic, how would this affect the poor seals

In a not so different fantasy world, whose physics and thus are similar to our own how would including penguins affect the look and function of a typical arctic ecosystem. For the purposes of this ...
2
votes
4answers
126 views

Mid industrial revolution society on the planet from Pitch Black? [closed]

What would life be like for people in an 1800s era setting (give or take a century or specific technologies that should or should not exist if it's convenient), who live on a planet inhabited by the ...
3
votes
1answer
110 views

How abundant could silver be in one place if given the right circumstances?

The only limiting factors are that it has to be in an area near to the ocean and to mountains (Similar distance as the Himalayas to the Bay of Bengal), and that it has to be in a hospitable place, as ...
8
votes
2answers
164 views

Would this dragon-rider combo be physically plausible?

Taking into account the some limitations of the square-cube law, biology, and aviation, I have tried to make a dragon-like creature and a hominid that participate in a symbiotic relationship. For ...
3
votes
1answer
121 views

Position and Size of my Continents/Islands

its my first time posting here and i hope i do it right (watched the tour and all that). I've designed a World Map and would want to know if it looks realistic like that in terms of positioning of ...
2
votes
1answer
90 views

What would our world be like without zinc? [closed]

Suppose that we evolved on a planet entirely without zinc. How would our civilization be different if we didn't have access to this metal? What alternatives would we develop? What technologies would ...
7
votes
4answers
324 views

If humans were transplanted to a different Earth-like world that they didn't evolve on, how would they deduce how they came about?

I have a world where prehistoric humans were kidnapped and transported to another world. This other world is Earth-like, with mammals (also transported from Earth then later diversifying into other ...
2
votes
2answers
67 views

How do the Martians prevent salinization of their canal network

In a previous question I asked if a world similar to that envisioned in the Mars of Edgar Rice Burroughs / H G Wells could exist? And if so would canals be a practical way to make the planet habitable ...
3
votes
1answer
68 views

Ideal sun type and corresponding effects for a terrestrial planet with 256 days in a year?

The planet has 256 days in a year, split up into eight months, each with 32 days. My planet is a bit smaller than Earth: Think, enough space for the continents of Earth’s western hemisphere and the ...
7
votes
4answers
173 views

How far should second star be in my binary system?

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 ...
-1
votes
3answers
208 views

How can my 1.2 km long aircraft carrier catch ships like “Queen Anne's Revenge”? [closed]

Rod Reiss is the name of my fictional aircraft carrier. It's a 1.2 km long, 180 meters wide and 90 meters high slab of metalic foam of an alloy of aluminum, designed to withstand high temperatures. It'...
3
votes
1answer
200 views

What to remove to make a realistic Omni-Directional Maneuver (ODM) gear?

One thing I like about Attack on Titan are those lovely Omni-Directional Maneuver (ODM) gears! They're the perfect combination of a jetpack and a grappling hook. I love how the thrusters are placed at ...
6
votes
2answers
153 views

Life without a bright star?

The main source of free energy that allowed life on Earth to develop was our sun. It bombards the planet’s surface with photons of high energy, which provide activation energy for reactions necessary ...
3
votes
4answers
472 views

Are two Pangeas possible?

As we know, the Earth had one super continent at one point in the history of our planet, which eventually broke apart to become what we have today. Assuming we're talking about a planet near ...
8
votes
1answer
164 views

Planetizing the World of Jack and the Beanstalk: How Small is Too Small?

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, ...
0
votes
4answers
129 views

What could hinder a highly developed species from erasing humanity from the surface of earth? [closed]

Sorry for my poor English. Me and google translator are doing our best to translate my question properly. My story evolve around sentient planets. Let’s imagine every Planet in my universe is ...
1
vote
1answer
90 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 ...
2
votes
3answers
97 views

Could a planet have a week long day and a week long night depending on the season?

Essentially I'm looking for a plausible way that a planet could have odd, extreme seasons. Basically I'm wondering how (or if) a planet could work that has a week long day during the summer and a week ...
4
votes
3answers
165 views

is there a way to levitating entire body of water in earth and make it stay in the sky?

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 ...
1
vote
1answer
97 views

What Star would encourage what color of plants? or, a table of star types to the most efficient plant color [duplicate]

Using the following list of stars, what color is the most efficient for plants to absorb the ideal amount of energy? (This is not a complete list of star types, just some big examples) Yellow Dwarf ...
-1
votes
1answer
54 views

How different from reality should a complete fantasy world be? [closed]

Consider a story set in a completely fictional place, not even necessarily on a planet, perhaps an infinite plane of uniform density or something. There is zero connection with Earth and anything that ...
5
votes
3answers
121 views

How to improve the speed of ancient mariners

My world is set in ancient times on a planet similar to Earth, but with a different civilization and different geography (and lots of canals). I need to find a way of giving the inhabitants better ...
4
votes
1answer
127 views

How to have habitable hollows on a planet

In the world that I am making there are hollows all over the planet, which are massive underground subterranean areas of the planet. Think The Hollow of the Gears Of War series. So far the going ...
4
votes
2answers
163 views

How can I have an Earth-like moon?

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 help, ...
9
votes
9answers
2k views

What would it take to slow down fermentation? (Specific: Wine / grape juice)

I am working on a story about a person who was raised on an earth-like planet and later moves to our earth. The planet he is from specializes in fruit juice and alcohol making, in specific, wine. When ...
2
votes
1answer
107 views

Which weapons would humans with electric organs invent? [closed]

In a like-earth scenario, human-like-race discovers to have an electric organ in the body. Imagine it happening with the progression of 1800, when most of discoveries took place, leading to a better ...
13
votes
8answers
2k views

Dragons have an armor that is similar to that of sungazer lizards. Why would the dragons have the spikes as well?

A Smaug giganteus. If you do as much as think about slaying it, I'll force feed you gasoline and shove a match down your throat. Sungazers are awesome. They're so awesome I decided to base some parts ...
8
votes
2answers
347 views

Is a 500 kg flying creature possible?

I usually like to leave some wiggle room for myself when fleshing a concept out. Dragons make that sort of impossible, same's true for nanomachines but ripped senators are a question for another day. ...
25
votes
13answers
5k views

Moonlight bright enough to see by

Is it possible for an Earth-like planet to exist where the light reflected by the moon is, not as powerful, but close in intensity to daylight? And if so, what would be necessary for it? A moon much ...
3
votes
1answer
91 views

What could cause Fluorocarbons to be present in an Earth-like atmosphere?

Pretty simple (in theory that is) question for one of my worlds. I heard carbon fluorides are intense greenhouse gases but otherwise harmless and didn't lead to large issues (atleast none that I could ...
3
votes
2answers
132 views

How would pneumatics in a world with a denser atmosphere change?

I've thought of a super-earth with 30% higher gravity, a denser atmosphere, which facilitate the willing suspension of belief for my giant fireflies that terrorize the local humanoids. Due to the ...
2
votes
2answers
136 views

Civilization on an Earth-like planet without using waterways for transport

On Earth, civilization grew up around river valleys. Rivers are useful as a water source, a food source, and a waste disposal system, but their most important function to a civilization is enabling ...
17
votes
7answers
5k views

Is It Possible to Have Different Sea Levels, Eventually Causing New Landforms to Appear?

I'm trying to explain a large continent-sized archipelago that doesn't run in any particular direction. As such, plate tectonics cannot possibly explain its existence. This is an Earth-like planet. ...
24
votes
14answers
5k views

In what sequence should an advanced civilization teach technology to medieval society to maximize rate of adoption?

If a small group of an advanced civilization got stranded in a medieval-like society on another planet and they start to interact in a peaceful way, what would be the first technologies that they ...
4
votes
2answers
192 views

How would mountainous landscape look like after remodelling it with nuclear warheads?

As conclusion of this question it seems that under a dense atmosphere it would be a good idea to place the main city in mountains. Just there is the inconvenient issue that top of mountains lack flat ...
9
votes
1answer
203 views

What is the fastest an earth-like planet can spin and still support life, and would it be possible to launch space-craft from it?

I was wondering, if a planet in similar size and mass to earth would have, from its creation, been spinning at this hypothetical planet speed limit (with it somehow staying in once piece) could life ...
7
votes
3answers
176 views

How many human inhabitants could Earth host in a far future? [closed]

Assuming a technologically advanced civilization that has grown sustainably from the resources of its own planet (and maybe "a few" additional resources from its own solar system), what would be the ...
7
votes
3answers
144 views

Can my planet have a very thin atmosphere only at the poles?

While thinking about Starfish Prime's answer to the question Algae using UV light from auroras for photosynthesis, I considered the possibility of an alternate Earth which has a normal, Earth-like ...
6
votes
7answers
281 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 ...
3
votes
1answer
128 views

Will my planet work? (size, gravity, atmosphere)

I was going to sort this all out beforehand, and then write the book, but when the writing flows... you make hay. I am a perfectionist/details-oriented person, but you lose me on math/hard science. ...
4
votes
1answer
71 views

distance between climate/geographical changes

I have an Earth-like world (approximately 1000CE technology--horse/mule for travel) that I want to have my characters traverse over the course of the book. I want the areas to have distinct geography/...

1 2 3 4 5 12