Questions tagged [solar-system]

For questions regarding a star and the area comprising its gravitational dominance. While they are not part of its technical definition, it colloquially refers to the planets, moons, asteroids and other bodies orbiting the star.

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5
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5answers
647 views

An alternative way to rotate or in this case rolltate

As far as we know Earth and every other planet in the solar system rotate around their axes. Whether it be Uranus which rotates on its side or Mercury which rotates perfectly straight, all planets ...
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1answer
80 views

Looking for a Solar System Simulator including the smaller celestial body, for macOS

I am researching for a sci-fi story that will happen in 2136. There will be a lot of traveling in the Inner Solar System and I need to know the relative distances between two objects. Also, I would ...
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Is my planet realistic?

Is my planet realistic? It doesn't need to be able to support life as it's just another planet in my solar system, but is a planet with such a high density and gravity really possible? I calculated ...
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Solar expansion and habitability

Is there a feasible setup where the Sun has expanded enough to make the Earth uninhabitable, but some of the other rocky bodies in our solar system (past Earth) become more reasonable colonisation ...
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3answers
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I'm formulating a planet that has silver dust on its surface, and ideally has rivers of mercury flowing on it, possible? Human survival not necessary

I'm new to this and my scientific knowledge is massively lacking in this area (so please take it easy on me!) I'm writing a historical science-fiction novel. Parts of it set in the past (1977) and ...
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1answer
115 views

Binary Star System Build - Alpha Centauri

I'm not sure if this site or Astronomy would be better, but I figured I would try here instead. I am attempting to create a [semi]plausible star system in Alpha Centauri for a series. The system was ...
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1answer
88 views

What would have happen to the Solar system if we were to mine a planet away [closed]

So the idea is to slowly mine a planet away , one like Mercury or Venus or Mars. Doesn't matter why or how. Only one of these planets would be removed. How the Solar system would react? Earth will ...
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1answer
104 views

Planet with only plant-based life and very thick atmosphere [closed]

Working hypothesis is as follows: Solar system with an A class sun. Planet has a very thick atmosphere which does not allow much visible light in to the surface. (Like dusk in the day time and ...
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9answers
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Are Geologically Dead Planets Habitable?

One of the planets I'm thinking of for my book series has all of its landmass in the northernmost half of the northern hemisphere (it is thus mostly a water world) and is completely geologically dead. ...
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7answers
142 views

What kind of lunar orbit would cause a total solar eclipse to happen once a day?

The eclipse needs to be visible from at least one region on the planet every revelation and last about one hour.
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How long to become a habitable planet

I am creating a world for Sci Fi story in which I am trying to have two non-tidally locked earth sized planets in a binary orbit around Alpha Centauri A. The only way I can think of this happening is ...
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1answer
128 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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1answer
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How Would These Planets Affect Earth's Eccentricity?

A cleaner, narrower-focused improvement of How This Alternate Solar System Influences the Milankovitch Cycle, so not a duplicate. For further clarification, eccentricity is the shape of a planet's ...
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The Earth and Moon resolidify under a bluer star, their outer layers evaporated and burned away. What do they look like now?

(This is the third in a series of questions, starting with Moved into further orbits to protect them, how much damage do Earth and Moon take when the Sun expands? and How soon does the Earth's ...
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2answers
82 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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321 views

How soon does the Earth's surface re-solidify after the red-giant Sun is replaced with a different star?

(Note: This is a follow-up question to my previous one: Moved into further orbits to protect them, how much damage do Earth and Moon take when the Sun expands?) Thanks to clever stellar engineering ...
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What tech would aliens use to harvest/alter our star and why?

I'm trying to create a scenario where the local star is "quickly" (suddenly up to thousands of years) removed, dimmed with reduced output, destroyed (maybe), or otherwise fundamentally changed as to ...
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189 views

What if Jupiter and Mars swapped orbits?

I am wondering how will it affect earth or none at all. Seeing that Jupiter by far is a gas giant and has really strong gravitational pull while Mars is mostly dormant, weak gravity and a terrestrial ...
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1answer
222 views

Moved into further orbits to protect them, how much damage do Earth and Moon take when the Sun expands?

Short version A far future catastrophe burns/melts away large chunks of the Earth and Moon. For reasons related to my story's fantasy elements, the remains of the Moon have about one fifth their ...
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1answer
278 views

In a Red Giant Binary System, How Far and How Wide Can the Habitable Zone Be?

Our estimates of our own habitable zone--a piece of space in which liquid water is possible--have varied over the years, but the current estimate is by Ramirez and Kaltenegger in 2017. Based on an ...
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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 ...
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How do you get steel outside Earth?

I'm looking for a more economical and efficient method of making steel for my project Death Star Unlimited, a mega infrastructure orbiting Mars with a mass of 500,000,000 metric ton give or take 1%. ...
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Inter-Planetary Communication [closed]

In my universe humans have colonized Phobos, Deimos, the moon, and Mars. However, they have no fast way to communicate with each other. I'm looking for a fast and possible way for humans to ...
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5answers
111 views

Observatory on another planet in the solar system

My novel takes place in the not-so-far future, where the humans have small settlements and/or bases on the Moon, Mars and Europe. They don't have the tech to leave the solar system, but they actively ...
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2answers
116 views

The major effects on the habitability of exomoons orbiting this Brown Dwarf

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 part ...
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1answer
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How bright is the night with 18-22 AU distant star?

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 ...
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1answer
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Binary star system i need help finding habitable zone [duplicate]

I have revamped my queshton a 3th time so i can get my ansure. The last 2 times i forgot something or got my math wrong. so i hope i got it all and got my math right, third times a charm. I have a ...
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175 views

Under which circumstances could a planet have two visible suns?

In the story I'm making, it is important that there are two suns in the sky, going at different rythms (maybe the planet orbits one of them each year, and the other each four years, for instance), and ...
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2answers
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How would a binary star system with a planet with 2 moons work? If possible

I am creating a solar system that has a binary star system. The system has 3 planets. The closest being like Mercury. The next being the planet that supports life and being slightly larger then earth....
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How can an Earth-like moon meet these angular diameter conditions?

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 tried ...
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1answer
168 views

Is it possible to make a stable planetary system like this, and what would the orbits have to be?

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 mass ...
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5answers
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What star can give an earth-like planet a 1-day year?

I did the orbital period for a planet orbiting a mass = 1 sol with a 24-hour year, it’s got a semi-major axis of 1.82 million miles - far and away beyond the Roche limit, still beyond the corona, but ...
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2answers
158 views

Creating “Sunfall” on the moon of a gas giant

I'm attempting to figure out the orbital physics of a system that has a habitable body that has intense periods of waxing and waning sunlight. I've come to the assumption that the best body for this ...
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1answer
112 views

Could a binary planet system have a shared magnetic field?

I want to have a two-world binary planet system where both have intelligent life, orbiting a single star. The two planets are assumed to be tidally locked to each other and orbit each other every 36 ...
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6answers
368 views

Could there be a planet where no electrical device works but that it can house life? [duplicate]

Far, far away from the Earth, there is a planet. A planet full of life. Where an intelligent species reign above all. But they haven't mastered the spirit of the thunder, and they will never. This ...
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Could a solar system exist inside of a nebula which is made of breathable gases?

Far, far away from the Earth, there is a nebula. An enormous cloud made of 78% nitrogen, 20% oxygen and 2% other non-lethal materials. These gases swirl around a star, and the pressure around it is ...
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1answer
144 views

Could intelligent life arise on a planet that isn't 'tethered' to a star, just drifting near to one? [duplicate]

Earth's movement in space is obviously linked to the Sun, as are many other planets. But what I'm asking, is could intelligent life develop on a world that is merely 'passing by' and basking in a ...
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4answers
122 views

Could a new planets plane be at a different degree as the other planets in our solar system?

I read this and wonder now, what if we would introduce a new planet to our solar system; would the force of gravitation demand a similar plane as that of the other planets? Mercuries 6.3° indicate ...
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1answer
94 views

Multiple earths orbiting around the sun? [duplicate]

Let's say that another earth popped into existence in our solar system on the exact same orbit around the sun as our earth. Say it is exactly opposite to the earth in the orbit. How would this new ...
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5answers
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What types of stars do not have a CHZ/Goldilocks zone?

Most stars have a continuously habitable zone (CHZ), but I'm specifically trying to think up ones that do not. Aside from pulsars and black dwarfs (theoretical, as the universe isn't old enough to ...
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2answers
196 views

what's the name of a solar day on other planets? [closed]

people refer to a solar day on Mars as- "sol". are there any specific names for solar days on other planets, such as Jupiter or Venus for instance? or either "sol" is just a name for a solar day on a ...
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1answer
71 views

Gravitational and Electric Forces in the Movements of Planets

Now that we know about the electric nature of the cosmos, the question arises: "How much are planets affected by electric forces while moving through the universe?" We have been taught that the ...
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1answer
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How much of our solar system can you change without breaking the science of life on earth? [closed]

I am making a near-future setting that takes place in an alternate solar system that's similar to ours (one planet with life, a moon, and other planets without life and their associated moons). And ...
5
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3answers
153 views

how could I move an earth sized planet? [duplicate]

How could a Kardeshev II level society move an earth-sized planet at high speed, without killing everything on the planet and access to all of the resources in a solar system similar to our own? what ...
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3answers
241 views

How could I scientifically explain a world with day/night cycle only on the equator?

I'd like to build a world that has one pole where it's constantly day (all year long) and the weather is very hot, and one where it's constantly night (all year long) and the weather is freezing. I'd ...
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4answers
383 views

Where could materials to build a Dyson swarm come from?

Let's assume we want to build a Dyson swarm that collects over 90% of the energy from the sun and orbits between the Earth and the sun. Also assume that we want to get none of the resources to build ...
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1answer
229 views

Effects of multiple moons on a planet

Judging by our own planet we know what the effects of a moon on a terrestrial planet are. We also know that if a planet has two moons on the same side you would get insane tides and that two moons on ...
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3answers
432 views

How close to each other can Earth-mass planets plausibly form from the protoplanetary disk?

We occasionally get questions and answers that discuss how close to each other planets can be and still meet some criteria. For example, this answer to the question ''Habitable'' planet close to a ...
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1answer
148 views

What set of circumstances are most likely to lead to a planet with a climate resembling the Great Plains?

Part of my story will be set on a planet where a culture similar to that of the Old West has arisen - cowboys, frontier towns, homesteaders, etc. In order to make this development more plausible, I ...
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3answers
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Hiding a solar system in a nebula

I have a planetary system with a yellow dwarf similar to our own Sun and three habitable planets. I want to hide this system from sight and long range scans in a nebula, a giant cloud of dust and gas ...

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