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Questions tagged [rogue-planets]

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

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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
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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
126 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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5answers
205 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
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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
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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
225 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 ...
0
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4answers
454 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
144 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, ...
3
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4answers
266 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 ...
4
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2answers
210 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 ...
3
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1answer
227 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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4answers
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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
103 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 ...
3
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3answers
480 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 ...
4
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3answers
286 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 ...
2
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3answers
435 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
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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
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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
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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 ...
5
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2answers
180 views

Solitary celestial body with support for humanoid life

Suppose that a god has created a universe with nothing in it, except for a single, solitary celestial body. For simplicity, I'll call it a planet, although it most probably technically won't be. For ...
7
votes
3answers
328 views

Can a planet that is tidally locked to its sun have a satellite that is not tidally locked to its sun?

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 ?
3
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1answer
200 views

Can a moon provide an exoplanet a habitable source of heat due to tidal heating?

My theory is that if a moon's orbit is situated in between the exoplanet and a second satellite, tidal heating could occur and turn the moon into a sustainable heat source for the host planet. Could ...
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26answers
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Why would any interstellar starship still bother with streamline body design?

Let's not debate whether is there any friction while traveling inside vacuum space and assume all ships can brave a perfect storm brewing inside the giant molecular cloud. OK let's get down to ...
4
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1answer
125 views

What material could be used for circuitry used for interstellar flight?

I plan to write a story about a large number of space probes that are equipped with artificial intelligence and told to explore star systems and travel between them. These probes are not equipped with ...
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6answers
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How could you keep a rogue planet warm(ish)?

I'm working on a story right now where darkness plays an important role, and I had the idea to set my story on a rogue planet, a planet in perpetual darkness because it has no sun. However, from what ...
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2answers
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Long lasting life on interstellar planets?

A short time ago I read that life might be possible on interstellar planets (i.e. planet-like objects which aren't bound to a star by gravity.) They may be insanely cold on the surface but inside they ...
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2answers
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What would happen if an errant icy planet impact an star with similar size?

The errant planet is similar in size with the star and it's made all of water. Usually is icy, but probably gonna melt when approach the star. What happens during the process of collision between the ...
2
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2answers
121 views

What are some methods to locate a rogue planet in deep space?

My thought is, if an intelligent race were to stem from such a planet, locating it would most likely be a lot different than finding a regular planet orbiting a star.
3
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4answers
271 views

Is it possible for a geologically active 'rogue planet' to support life?

After reading a couple dozen entries about rogue planets and their implications (for those unaware, a rogue planet is a planetary mass that has been separated from the star by gravitational ...
2
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3answers
272 views

Advanced civilisation and a rogue planet approaching

First, a little background information. For the purpose of my story, I'm making the Earth uninhabitable, similar to this question. This is to cause a mass exodus from the solar system through a bit of ...
3
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2answers
2k views

Can Venus' Surface Get Hit Hard?

Over four and a half billion years ago, Theia, a rogue planet the size of Mars, slammed into the infant Earth. This impact is believed to have resulted in the birth of many things, from the moon to ...
6
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3answers
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How do primitive intelligent species navigate on a rogue super-Jupiter planet in the Boötes Void?

The Boötes Void, a.k.a the Great Void, is celebrated for having a comparatively(competitively) lower matter density than the rest of the universe. Imagine an intelligent species similar to our ...
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4answers
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What happens when one planet “lands” on another?

Imagine, if you will, an Earth-like planet orbiting a Sol-like star. Now imagine that, from somewhere outside the solar system, a rogue planet, rocky and of roughly the same size and mass of the ...
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How to make a rogue planet liveable?

Rogue planets are generally not to healthy for us humans to live on. No permanent source of heat or light means that generally they are a pretty cold place. Plenty of other problems arise too, but ...
2
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2answers
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Would it be possible for a species to adapt to extreme temperatures over a long period of time?

So, I have a species in my story, one of many, called a Baldrethian. They inhabit a planet called Baldreth, which has been moving across the galaxy for eons. It started off closer to the Sun than ...
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8answers
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Can we start a colony on a passing rogue planet?

A rocky planet, similar to Earth in mass and composition, is set to pass through the solar system in one year's time. It has frozen oceans of water ice and a thin atmosphere of unknown composition. It'...
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2answers
144 views

Artificial star satellite

Related : Artificial star Instead of creating a literally artificial star, i want to create a satellite that has a fusion plant inside it and lots, LOTS of high power lights outside shining towards ...
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5answers
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Artificial star?

A long time ago in a galaxy called the Milky Way..... An alien race had its planet thrown out of its solar system. It is now a rogue planet. They survived for thousands of generations in underground ...
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3answers
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Surface temperature of a icy rogue planet

A certain imaginary stellar system had once a water world. But instead of evaporating away under the stellar wind, this lucky (or unlucky?) water world (made of only water and a gaseous atmosphere) ...
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3answers
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What would happen if a rogue planet entered our Solar System and stayed? [closed]

If a rogue planet entered our Solar System and push our (Earth's) orbit away from the Sun? What would happen to Earth on an environmental scale?
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Could a rogue planet be the host of a planetary system?

That is to say, could a planet be big enough to have other planets orbiting around, while not orbiting around any star? Cha 110913 seems to be close to what I'm looking for, but its classification is ...
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7answers
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How would rogue planet civilization track the passage of time?

If a species were to evolve on a rogue planet, how would they track the passage of time? Without day/night cycles or revolutions around a star, they couldn't use the typical methods that civilizations ...