Questions tagged [planets]

For questions about any large astronomical bodies classified as planets, and their effects on their systems.

Filter by
Sorted by
Tagged with
0 votes
4 answers
115 views

Could a planet be cut in half and still sustain life?

Say some sort of anti-planet weapon shoots an arc of energy slicing the planet in 2, could the said planet keep it’s atmosphere and life.
user avatar
5 votes
2 answers
777 views

What arrangement of celestial bodies would allow high and low tide to last for the longest time?

I want to create a planet that has the longest possible length of time that the tide is low to allow land animals to forage in the exposed shoreline ecosystems. What arrangement of star, planet and ...
user avatar
3 votes
1 answer
72 views

Life on a Moon-like Earth?

Aside from being smaller, the Moon has a distinctly different bulk composition from Earth--its mantle is proportionately much larger, and its core is proportionately much smaller. Suppose that Earth ...
user avatar
2 votes
1 answer
70 views

Exoplanet sky with suspended ice crystals

I'm envisioning a planet around a sunlike star, with gravity and temperature similar to Mars, but covered with a thin shell of water ice (with CO2 ice at the poles). The atmosphere's pressure and ...
user avatar
9 votes
4 answers
2k views

Would a lower gravity planet have deeper oceans and higher continents?

I'm designing a lower gravity planet that's got enough mass to hold onto an atmosphere but around 75% of Earth's gravity. I read that lower-gravity planets will have more pronounced geological ...
user avatar
  • 275
1 vote
2 answers
67 views

Would a high iron content world have particular effects on its more common minerals/elements?

I have a world which has a high iron content in its core, like a more extreme version of Mercury, geologically speaking. The system only has this world and a tidally locked hot Jovian (of which the ...
user avatar
1 vote
2 answers
167 views

Is this an accurate environment for life on a super Earth speculatively?

My alien planet is a super Earth. It revolves around a K-type star in the habitable zone and has a lower gravity. The mass is that of 2 Earths(or how ever superearths mass normally are).The atmosphere ...
user avatar
7 votes
4 answers
1k views

Can Mars disintegrate entirely in this scenario?

I have a hypothetical scenario in which Mars flies over Jupiter at close range. I want to make Mars disintegrate entirely in this scenario while keeping the scenario scientifically accurate (please ...
user avatar
2 votes
3 answers
241 views

how would you call a star when referring to a "sunset" or "sunrise" [closed]

So, I've been developing a worldbuilding project, and I have an issue with this one planet's star, the planet it's called Xin Anhui, that means "new Anhui" a province in China, based on the ...
user avatar
0 votes
0 answers
48 views

How would the color of the sun effect the color of the plants [duplicate]

For example, what would plants look like under a red giant? something like that. thanks
user avatar
  • 1
6 votes
8 answers
2k views

Is it possible to have a habitable planet with 2 sun that have sunset for one and sunrise for the other at the same time?

One of my characters is a bit of a romantic, he also have a post singularity fleet of spaceships at his disposal which he plans on using to scour the galaxy to find what he considers the ultimate ...
user avatar
  • 6,609
5 votes
3 answers
248 views

Lift 10 Billion Tons of Material From a Planet (Every Second)

150 years into the future, a space faction found itself in a Nicoll-Dyson beam arms race, where it must build a Dyson swarm as quickly as possible. The basic situations they face are as follows: ...
user avatar
4 votes
2 answers
86 views

What would happen on a binary planet if they captured a new moon into orbit?

I've been working on a world where the origin of the magic system is a catastrophic event that ripped the surface of the planet apart allowing magical energy from beneath the crust to escape to the ...
user avatar
  • 41
3 votes
4 answers
90 views

Oxidized alkaline planets?

Obviously, it is possible to have a planet with an oxidizing and acidic surface environment--just look at Venus! But is there a plausible natural way to get a planet with an oxidizing but alkaline ...
user avatar
2 votes
5 answers
129 views

How could large scale mining operations render an arid region unlivable?

A story I am working on sees the characters returning to a fairly arid planet that was mined heavily by an interplanetary corporation. This left most of the planet uninhabitable and forced the local ...
user avatar
39 votes
10 answers
7k views

Can a planet stay cracked?

Images like this and this are common in sci-fi/fantasy settings, for the obvious "rule-of-cool" reasons. And while the 'rule-of-cool' is certainly worth using (in moderation) when ...
user avatar
  • 4,005
5 votes
1 answer
52 views

How could I design storms in an arctic setting that would logically become more severe as a result of a changing climate?

Part of my story is set on an arctic planet (think something along the lines of Hoth or just some planet deep in an ice age) where a research team is sent by a major intergalactic corporation. I want ...
user avatar
3 votes
1 answer
100 views

What are the most important aspects of an environment that a drone would need to report for survivability?

Setting: You have an armada of intergalactic unmanned drones, whos sole purpose is to survey planets (or portions of planets) and report information about its survivability, and usefulness in ...
user avatar
9 votes
8 answers
3k views

Life underneath a blue star

Blue stars are notorious for burning too bright and living too briefly for life to develop around them. But is there some way that life could survive long enough to reach the sentience stage? I'm ...
user avatar
  • 2,640
5 votes
3 answers
184 views

What chemicals would an atmosphere unbreathable by humans (yet allowing alien life to thrive) contain?

(first question, hi!) At the moment, I am trying to bring a planet which contains an atmosphere that can barely be breathed by humans (14% oxygen to be precise), to life. This planet is abundant with ...
user avatar
  • 59
5 votes
4 answers
995 views

What conditions would have to exist for a planet to be covered in day most of the year and experience nightfall only a few times? [duplicate]

So I'm trying to determine if it's realistic for a planet to experience daylight for most of the year while experiencing nightfall only a few times within that same year? Say, less than 10 times? Also,...
user avatar
4 votes
1 answer
102 views

How would I calculate the greenhouse effect based on atmospheric composition?

Problem: For a known, but hypothetical planet orbiting a celestial body, how would I calculate the surface temperature after greenhouse gases? What I know about the planet as given: Planetary ...
user avatar
  • 101
3 votes
3 answers
868 views

Could a planet without an orbiting moon still be habitable to human life in at least one small pocket? [closed]

No moon likely means no tides. Does this make a planet half water, half land, or similar divisions? Do freshwater and saltwater have separation? Or would it just be a planet like ours, with delineated ...
user avatar
3 votes
1 answer
165 views

How would an invading force purposely put high levels of radiation on a planet?

The planet I've built was at one point inhabited by a society of somewhat advanced (think late 1800s) humanoids. Earth-people came to the planet in their first attempt at universal conquest, but ended ...
user avatar
3 votes
3 answers
190 views

If we accidentally spread microorganisms to other planets in our solar system, could they evolve into complex life?

Is the following story plausible: a spacecraft transports microorganisms from Earth to another planet or moon in our solar system. Those microorganisms survive, and eventually, evolve into complex ...
user avatar
7 votes
0 answers
49 views

How would the landscape of a gas giant's core-mantle boundary look like? [closed]

In my setting, the characters live at the bottom of a gas giant's metallic hydrogen ocean, just above the rocky core. There the dense metallic hydrogen acts as the ‘air’ and the core as the ‘ground’ ...
user avatar
1 vote
2 answers
77 views

How to Cause a Hydrosphere Apocalypse III: Erosion and a Shallow Sea

This is a bit of an addendum to a previous question, shown here. (How to Cause a Hydrosphere Apocalypse Part II The Great Flood). I like the rain of ice from a dying moon, answer and I have decided to ...
user avatar
  • 1,885
4 votes
2 answers
108 views

Would seasons be affected on two planets sharing the same orbit?

I'm writing a science fantasy short story where two planets share the same orbit (ie, they don't orbit around each other, then orbit their star, they orbit the star, but one of the planets follows ...
user avatar
  • 2,441
6 votes
2 answers
350 views

Atmospheric pressure in an almost empty world with a specific habitable zone far above the ground

I'm currently working on the following concept of a world for a high fantasy setting: The world's core has a radius of around 100 km. Inside is a magical object that creates a large-scale (planet-...
user avatar
-3 votes
2 answers
77 views

Elliptical orbit verses extreme axis [closed]

What could be the differences between adaptations to a planet with extreme axial tilt and one with a highly elliptical orbit? The only difference I think is the tilt world's winters could be avoided ...
user avatar
  • 2,640
4 votes
1 answer
55 views

Day/night cycle and tracking celestial positions in S-type binary star system

I know this has been asked before but I'm going to pose the question again under slightly different circumstances and with a more specific goal. I'm trying to work out the details of how the day/night ...
user avatar
  • 41
15 votes
6 answers
3k views

Are jumping ships feasible? (Not jump drives, but ships that jump)

As mentioned above this is not about jump drives, this is about ships that physically jump. Writing science fiction, trying not to handwave too much, so I want to check if this is a feasible tech. ...
user avatar
2 votes
1 answer
75 views

Consequences of living on either of two habitable planets orbiting a super-Earth? [closed]

I'm working on a habitable planetary system just at the doorstep of the Solar System. I'd like it to be unique, so I'm thinking of using two habitable planets orbiting a super-Earth. The super-Earth ...
user avatar
4 votes
3 answers
103 views

A tidally-locked planet's dry ice caps

An exactly Earth-sized tidally-locked planet orbits its host star, which is functionally identical to our Sun, at an average distance of 1 AU, the same distance that the Earth orbits the Sun. The ...
user avatar
  • 9,626
3 votes
4 answers
134 views

Survival on a dark hycean world

As a follow up to my previous question: Surviving a dark hycean world I ask this: how could life adapt to a tidally locked ocean world with thick atmosphere and perpetual storms? That's the definition ...
user avatar
  • 2,640
8 votes
3 answers
147 views

Surviving a dark hycean world

A dark hycean world is supposed to be a hot water world with a thick atmosphere around a red dwarf star. This means it's tidally locked with one side forever facing the sun and the other forever ...
user avatar
  • 2,640
3 votes
1 answer
109 views

Is this a hycean world?

In the speculative astrobiology book Teeming universe by Christian Cline, there's a planet called Hurcelion. It's described as a hybrid of rocky and gas giant planets. Most of the life floats or flies ...
user avatar
  • 2,640
2 votes
3 answers
147 views

On Ocean Planets and their traits [closed]

I am working on an ocean planet, and I am wondering what conditions would be expected of a planet whose surface is entirely water. Or more accurately, how accurate is my exact idea. My current idea is ...
user avatar
  • 734
12 votes
4 answers
2k views

Why do people blow up here?

My organolithium environment planet needs to be chemically stabilized But I don't know which compounds could physically evolve on a planet to form an atmosphere and seas wherein humans would ...
user avatar
  • 5,864
6 votes
3 answers
214 views

At what point does a human civilization on a dead planet require petroleum?

I’ve gone and designed an entire earth-like planet where life had never evolved. Oil can be reached if needed—the purpose of this question is to find how far they can go and avoid it. (Oil is ...
user avatar
  • 5,864
4 votes
4 answers
190 views

What would be the conditions to bring about an extremely mountainous planet

What would be the conditions of a planet for it to, over the years, form an extreme amount of mountains all across the planet. Not like a ball of spikes, just extremely mountainous. I still want this ...
user avatar
  • 734
26 votes
10 answers
5k views

Can a habitable world rain glass?

Requirements: There is a solid surface. Somewhere on the surface, the temperature exceeds 2,230 C, such that pure silica vaporizes. Elsewhere on the surface, the temperature is at most 25 C, such ...
user avatar
13 votes
3 answers
2k views

How close can my brown dwarf orbit the sun and still realistically be undetected? [duplicate]

I have an idea to put another life-bearing planet in the solar system. You could have a brown dwarf orbiting perpendicular to the solar ecliptic. It's a brown dwarf so that it can send infrared ...
user avatar
  • 13.1k
5 votes
0 answers
125 views

Questions about the potential characteristics of a hypothetical Planet 9

So, I'm writing a story. Most of the main story is set near Planet 9, which has finally been found somewhere far out in the outer solar system. So first, I’ve been working on determining the probable ...
user avatar
2 votes
0 answers
73 views

What would an Earth-like planet with a mostly stable ring be like? [closed]

I recently watched a video talking about what would happen if our moon was on a collision course with the Earth and they described it being ripped apart by Earth's gravity. This made me want to re-...
user avatar
  • 2,776
4 votes
3 answers
173 views

How Can a High Gravity Planet Have a Magnetic Field

We all like life forms from high gravity planets, it’s a popular Sci fi trope and one that I love to play around with. It’s fascinating to try and designs creatures for an environment that would ...
user avatar
  • 1,885
3 votes
2 answers
89 views

Are the currents on this planet realistic?

The planet rotates east to west, which is the opposite of earth. Its days are about 27 hours.
user avatar
  • 169
1 vote
1 answer
74 views

Could this planet retain a thick enough atmosphere to avoid needing a pressure suit? [duplicate]

Astronauts land on a planet. The planet is almost like a super-mercury; around 40% more massive than Mars, and 10% denser than Earth. Mercury's iron core takes up around 3/4ths of its volume, and it ...
user avatar
  • 914
6 votes
2 answers
76 views

How can I get mostly-hydrogen-sulfide seas (with lifeforms in them)?

The lifeforms don't have to use hydrogen sulfide as a solvent. Maybe they've got an internal water-ammonia eutectic mixture or something; anyway, it doesn't matter. The point is, I want an ocean of ...
user avatar
2 votes
2 answers
135 views

How colorful would plants and animals in a habitable planet orbiting a F main sequence star would be?

F main sequence stars are hotter and brighter than the Sun and therefore they emit more UV radiation than sun-like stars. Many scientists think that complex life could develop in planets orbiting such ...
user avatar

1
2 3 4 5
43