Questions tagged [rogue-planets]

Used for questions regarding a free-floating planet independent of any star.

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2answers
169 views

How quickly will the oceans freeze if Earth becomes a rogue planet?

Assume Earth has been wrenched out of the Sun's orbit and has become a rogue planet (for the purposes of this question, assume that it happens near instantaneously, i.e. say the Sun just vanishes). ...
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1answer
82 views

How do I get Ironclads/Submarines lifted into an in-atmosphere wormhole that leads into another identical one?

I am working on some lore for an overhaul mod, but I want to try to stay away from handwavium as much as I can, at first. There's two terran planets connected by many stable wormholes, the most ruckus ...
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1answer
99 views

How deep would the frozen atmosphere be?

I have a rough planet with the following specs: Data Value Mean Radius: 4886.4 km (almost 50% larger than mars) Surface Area: 3.00046x10^8 km^2 (0.58 Earths) Volume: 4.88715x10^11 km^3 (0.45 ...
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1answer
107 views

Complexity of ecosystems in oceans of rogue planets

I'm looking into building a setting for my alien biosphere. I thought that a rogue terrestrial planet, ejected from its home system and then developing life underneath the ice of its deep oceans, with ...
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2answers
172 views

Maintaining an atmosphere in deep space

Background: Imagine there is a planet in a solar system which has an atmosphere (let's say it is similar to our own atmosphere, but it doesn't have to be) and a very technologically advanced species ...
3
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1answer
118 views

What would a society living on a rogue planet look and be like? [closed]

I am a huge Doctor Who fan and one of my favorite Doctor who stories is Big Finish´s Doctor Who Spare Parts. This story takes place on earth´s twin Mondas, the story is at some point in the past ...
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5answers
3k views

Can any manmade vessels float on ocean of liquid nitrogen?

Humanity is finally reaching the interstellar space and had discovered a terrestrial planet covered in liquid nitrogen, the planet is orbiting a star thrice as massive as Sun but is too further away ...
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2answers
250 views

Can a rogue planet have a habitable surface due to geothermal heat?

I am making a rogue planet. Right now it is a super-earth with a lot of radioactive materials in its core. It rotates very quickly as well. However, it needs to be habitable. And not just the deep ...
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2answers
90 views

Plantlife seasons on the moon of a rogue planet

My moon is about twice the size of Earth, and orbits its planet from far away. It has no sun as it orbits a rogue planet, however its planet stretches it due to tidal heating, and thus it has heat. ...
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3answers
243 views

Is this rogue planet capture process possible?

I have a prelude to a story which involves a rogue planet entering the solar system, However I am concerned as to its realism. All of this is supposed to be based on real physics and rules; there's ...
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4answers
89 views

Efficient way and rough design to detect rogue planets in interstellar space

Let's imagine a civilization that has a way of colonizing rogue planets (ones not orbiting a star). It would want to expand, and therefore search for new worlds. What physical principle and rough ...
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3answers
98 views

Moon-moons of moons of rogue planets

So, I had this idea. It takes place on the moon of a rogue planet. This moon has moons, or moon-moons. The inhabitants need to be able to see all the moons as well as the planet they orbit- how is ...
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2answers
100 views

Long range communication on a rogue Earth?

Imagine that, for unknown reasons, the Earth has left the solar system. It has been a while now since the event. It's so cold outside that the polar caps met at the equator and the atmosphere froze ...
5
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1answer
232 views

TImeline of Rogue Earth

I have seen a video from Kurzgesagt that goes into some details about what would happen should the Earth be flung outside the solar system. It says that by the time Earth's altitude relative to the ...
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2answers
214 views

What if aliens recieved a rogue Earth?

Imagine: You are a member of an alien species, uncomparable to most living things on Earth, and living on an arid planet, around country sized oases. During your version of the 1800's your star ...
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4answers
97 views

Earth-sized Moon with Host Planet launched from Star System

Could a planet with the size and characteristics of the Earth orbit a gas giant and would the earth-like moon be able to maintain its orbit if the gas giant went rogue and was launched from its host ...
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4answers
281 views

Planet with double the orbital period of Earth

I need a planetary system for my novel where an Earth-like warm habitable planet has an orbital period of about 650 to 730 days. I know that is similar to Mars and that Mars would be too cold. What ...
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4answers
2k views

Colonies on Jupiter

I'm making a series where a multi-purpose frigate travels to Jupiter in order to help in the Mars versus Jupiter war. However, I don't know what the colonies would look like. Maybe floating with ...
3
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1answer
234 views

Binary planets that are not tidally locked

The story takes place in Alpha Centauri, with this binary orbiting just over 1 AU from Rigil Kentaurus. The star system will tightly packed, but following the 10 Mutual Hill Radii separation setup. ...
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2answers
100 views

Possible compositions of a rogue binary system?

I am attempting to construct a world that is primarily lit by light filtered through and reflected off of a crystalline moon so that, at its brightest, the planet receives about the same amount of ...
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4answers
629 views

After surviving a black hole/wormhole, what are the chances of Earth start orbiting in a new solar system?

In the event of our sun suddenly becoming a black hole or wormhole of sorts. It transports the earth to another solar system similar to ours. Would it be possible for our planet to start circling ...
9
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1answer
327 views

Geothermal gradients if Earth becomes a rogue planet?

Assume Earth has been wrenched out of the Sun's orbit and has become a rogue planet, with its surface equilibrium temperature falling to ~-240C. At what depth will temperatures remain "comfortable" ...
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5answers
1k views

How might people try to stop the world becoming a rogue planet?

I'm working on a story about Earth or an Earth like planet with current or very near future levels of civilisation and technology drifting or speeding out of the solar system. Currently my method for ...
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0answers
104 views

Super dense planet? [closed]

What's the most dense a planet could be and still be livable? How does water factor into the overall density of the planet. Is something like an osmium or iridium core even be possible/realistic? If ...
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5answers
450 views

Can we move the moon to use as a shield?

Do we have the capability of moving the Moon just a little bit to time a intercept with a moon size asteroid like the one in the picture? It just said that if we could intercept an asteroid far out ...
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1answer
127 views

Could a planetary nebula obscure the presence of a black hole/neutron star?

I have a civilization that lives on a planet located inside a nebula (and orbiting a normal, sun-like star). Would this nebula somehow interfere with/ obscure the sight of a rogue neutron star/ ...
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0answers
56 views

Could a rogue planet support life? [duplicate]

I was wondering whether a free floating planet could potentially host life. If so, how? I was thinking of a geothermically active planet, where the only source of heat comes within the planet itself. ...
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6answers
2k views

Can a planet have a different gravitational pull depending on its location in orbit around its sun?

As the title say, can a planet have a different gravitational pull depending on its location in orbit around its sun? Is this explainable without magic?
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2answers
218 views

How does steppenwolf planet generates typhoon?

In a distant future, a spaceship was investigating a gravitational anomaly somewhere within a chartered sector in the Andromeda galaxy. A disaster strikes and the spaceship was found marooned on a ...
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2answers
3k views

Earth becomes a rogue planet - how long can Iceland hold out?

Inspired by this question and my comment on one of the answers. If the earth were flung out of the solar system, it would rapidly become far too cold for any unprotected life to survive on the ...
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4answers
4k views

What if Earth became a rogue planet? [duplicate]

I'm writing a science fiction novel in which Earth essentially gets the boot out of our Solar System. No sun, no moon, just Earth flying through the depths of deep space. I need to nail down rogue ...
5
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1answer
186 views

Scale model solar system in interstellar space - will it work?

Now that FTL travel is here there are all sorts of family outings we can go on. One of these is a scale model solar system lovingly made by hobbyist Barty Slartfast. In full scale Sedna is three ...
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4answers
276 views

Big and fast rogue planet

There is a big, very big planet that is travelling fast, very fast. It’s a rogue planet (not attached to a star system). It’s going to pass close, very close to the earth. The earth is probably going ...
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3answers
215 views

Can A Theia-Like Object Make Earth Richer?

Let's start with a little backstory--our planet underwent an impact-coalescence cycle only once, 4.5 billion years ago, when a Mars-sized object named Theia destroyed the infant Earth in a glancing ...
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3answers
187 views

What would night look like on a distant planet covered in volcanic ash clouds?

If a planet was both covered in volcanic ash clouds/in the middle of nuclear winter and either had gone rogue or was the farthest point possible from its sun, what would “night” look like? How dark ...
7
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2answers
310 views

Humanity surviving on a sunless planet

My world was once analogous to our own Earth, where life evolved in the light and heat of a nearby star. Unfortunately, a cataclysmic event knocked the planet out of orbit and sent it spiraling as a ...
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4answers
545 views

Iron-rich rogue planet that is 12x Earth's mass collides with the Sun; now what?

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 ...
4
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2answers
174 views

Transmitting Digital Information Between Star Systems

I am familiar with the inverse-square law and how detrimental it will be to the power of radio signals as they advance outwards in space. Assume we have two (or why not more?) interstellar colonies, ...
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4answers
550 views

Terraforming an Earth-like Planet

I have been recently thinking and writing about a hard sci-fi universe with the exception of FTL. Within the system of Alchiba (or Alpha Corvi) lies a planet under the name of Mannhardt and is an ...
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2answers
250 views

Interstellar construction between star systems

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 ...
5
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1answer
344 views

What would happen if the earth was thrown into the interstellar medium? [closed]

So, for some reason the sun has randomly disappeared. The earth, along with the rest of the solar system, have been thrown out into interstellar space. Obviously, temperatures will plunge to levels ...
3
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5answers
410 views

What would the color of flora on a Rogue Planet be?

Question in the title. A Rogue planet is a sunless world that exists in interstellar space. It might be possible for life to develop on one, but what happens when that happens? I've seen people say ...
5
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1answer
134 views

Climate on a world with a Sun of varying luminosity

Given the daylight cycle discussed here (see the graph in the selected answer), suppose that the moon revolves in the equatorial plane, at a distance sufficient to light (barely) the poles, avoiding a ...
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3answers
987 views

Life on a rogue planet

I am imagining a special ecosystem on a rogue planet (a planet that wanders throughout space without orbiting a star or other heavenly object) but I would need your help to fill in the gaps and ...
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3answers
323 views

World with varyingly luminous sun

Consider a rogue planet, moving in a region of complete void absent any type of star (they all burned out). It is orbited by an artificial moon which shines and serves as the planet's sun. However, it ...
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3answers
681 views

Colonial divergence, the collapse of social monocultures [closed]

Here I've asked about overarching social structure at an interplanetary/interstellar scale. One of the answers has me wondering about something a bit different, a couple of my favourite stories (Frank ...
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4answers
2k views

Can we extrapolate from island culture to planetary culture?

Island culture usually takes one of two really basic forms: small, loose knit, widely distributed populations with a unifying shared culture across a large number of small islands. Polynesia for ...
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1answer
84 views

Distance between passing planets for atmosphere exchange to occur [duplicate]

If a rogue planet (let's say about as big as the Earth) flew by the Earth, how close would it need to pass to planet Earth for atmosphere to be exchanged between the two planets?
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6answers
833 views

How could Earth quickly deorbit the Sun without being destroyed? [closed]

Conditions Critical to the plot, Earth needs to be taken out of the Sun's orbit around 2050 (i.e., not destroyed; nor merely darkened via "indirect" solutions such as alien Dyson swarms surrounding ...