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Q&A

Posts tagged solar-system

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Q&A 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 ...

5 answers  ·  posted 2y ago by Nanoshadow‭  ·  last activity 2y ago by Matthew‭

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Q&A 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...

4 answers  ·  posted 3y ago by LonelyCryptid‭  ·  last activity 3y ago by LonelyCryptid‭

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Q&A 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 w...

1 answer  ·  posted 3y ago by user72655‭  ·  last activity 3y ago by user72655‭

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Q&A 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 ...

3 answers  ·  posted 3y ago by Dee‭  ·  last activity 3y ago by Dee‭

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Q&A 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 ...

3 answers  ·  posted 3y ago by RJ0001‭  ·  last activity 3y ago by RJ0001‭

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Q&A 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 de...

9 answers  ·  posted 3y ago by The Weasel Sagas‭  ·  last activity 3y ago by The Weasel Sagas‭

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Q&A 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.

7 answers  ·  posted 3y ago by Double_S‭  ·  last activity 3y ago by Double_S‭

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Q&A 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 surf...

1 answer  ·  posted 3y ago by Astrid_Redfern‭  ·  last activity 3y ago by Astrid_Redfern‭

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Q&A 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 ...

0 answers  ·  posted 3y ago by user72655‭

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Q&A 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....

1 answer  ·  posted 3y ago by user72655‭  ·  last activity 3y ago by user72655‭

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Q&A What would be the impact on Titan, Saturn and the Solar system if aliens harvested as much hydrocarbons as possible from Saturn's moon?

The scenario Many science fiction novels are concerned with aliens visiting Earth, but what if aliens have no interest in Earth at all and yet they arrive at the Solar system for the sole purpose ...

2 answers  ·  posted 4y ago by toncha‭  ·  last activity 3y ago by toncha‭

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Q&A 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 engineerin...

2 answers  ·  posted 3y ago by Astrid_Redfern‭  ·  last activity 3y ago by Astrid_Redfern‭

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Q&A 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...

1 answer  ·  posted 3y ago by JohnWDailey‭  ·  last activity 3y ago by JohnWDailey‭

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Q&A 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 t...

7 answers  ·  posted 3y ago by Zolvaring‭  ·  last activity 3y ago by Zolvaring‭

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Q&A 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 or...

1 answer  ·  posted 3y ago by Astrid_Redfern‭  ·  last activity 3y ago by Astrid_Redfern‭

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Q&A 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 ...

2 answers  ·  posted 3y ago by RJEsper‭  ·  last activity 3y ago by RJEsper‭

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Q&A The Nightfall / Kalgash System

"Nightfall" by Isaac Asimov (you can hear the story here on escapepod, if you need it) postulates a planet in a multi-sun system. The orbital mechanics of the 6 suns result in all of the sides of t...

1 answer  ·  posted 4y ago by Trish‭  ·  last activity 3y ago by Trish‭

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Q&A 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...

4 answers  ·  posted 3y ago by Dawidek‭  ·  last activity 3y ago by Dawidek‭

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Q&A 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 terrestr...

2 answers  ·  posted 3y ago by mico villena‭  ·  last activity 3y ago by mico villena‭

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Q&A 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 ...

1 answer  ·  posted 3y ago by JohnWDailey‭  ·  last activity 3y ago by JohnWDailey‭

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Q&A 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%...

2 answers  ·  posted 3y ago by user6760‭  ·  last activity 3y ago by user6760‭

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Q&A 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 p...

2 answers  ·  posted 3y ago by Axion‭  ·  last activity 3y ago by Axion‭

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Q&A 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 eart...

1 answer  ·  posted 3y ago by Failus Maximus‭  ·  last activity 3y ago by Failus Maximus‭

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Q&A 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), ...

1 answer  ·  posted 3y ago by Iván Flores Vázquez‭  ·  last activity 3y ago by Iván Flores Vázquez‭

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Q&A 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 t...

4 answers  ·  posted 3y ago by overlord - Reinstate Monica‭  ·  last activity 3y ago by overlord - Reinstate Monica‭

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Q&A 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 mas...

1 answer  ·  posted 3y ago by Axion‭  ·  last activity 3y ago by Axion‭

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Q&A What's in the outer system?

Background: It is sometime in the late 21st century. Several unmanned probes have recently been sent to land on and investigate Jupiter and Saturn's moons. Two sites in particular, Europa and Titan...

1 answer  ·  posted 3y ago by Lelu‭  ·  last activity 3y ago by Lelu‭

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Q&A What could make a star green?

Stars are never green. When a star's spectra "peaks" in the green range, it also releases a significant number of waves of the adjacent colors - so "green" stars appear yellow or white. I want ...

9 answers  ·  posted 6y ago by Zxyrra‭  ·  last activity 3y ago by Zxyrra‭

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Q&A 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, b...

5 answers  ·  posted 3y ago by Vogon Poet‭  ·  last activity 3y ago by Vogon Poet‭

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Q&A Is a habitable planet in a sextenary star system possible?

So I want my planet to have six suns, but I'm not sure how far apart these stars would have to be from each other to not produce adverse effects on the planet that would prevent life from developin...

5 answers  ·  posted 6y ago by Z.Schroeder‭  ·  last activity 3y ago by Z.Schroeder‭

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Q&A 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 thi...

2 answers  ·  posted 3y ago by Nymn‭  ·  last activity 3y ago by Nymn‭

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Q&A 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 3...

1 answer  ·  posted 3y ago by user8840452‭  ·  last activity 3y ago by user8840452‭

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Q&A Which side of a tidally locked moon experiences higher radiation?

Looking most specifically regarding the moons around Saturn, Jupiter, and Uranus. I've been unable to get a concrete answer on this through various sources. I've actually read several articles brie...

1 answer  ·  posted 4y ago by Kabob Maraca‭  ·  last activity 3y ago by Kabob Maraca‭

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Q&A 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...

3 answers  ·  posted 3y ago by Miguel NoTeimporta‭  ·  last activity 3y ago by Miguel NoTeimporta‭

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Q&A Do stars in a binary star system fall along the ecliptic?

I am wondering about Tatooine, and was reading about binary systems here, which provided a lot of good basic food for thought. My specific question is not addressed at that link, and so I pose it h...

2 answers  ·  posted 5y ago by DPT‭  ·  last activity 3y ago by DPT‭

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Q&A 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° indica...

4 answers  ·  posted 3y ago by Backup Plan‭  ·  last activity 3y ago by Backup Plan‭

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Q&A Rare Earth Elements in the outer solar system

If a space station were to be built in the outer solar system, is there an asteroid beyond Jupiter with a ratio of rare earth elements high enough to make it worthwhile to mine for the rare earth e...

3 answers  ·  posted 3y ago by Bob516‭  ·  last activity 3y ago by Bob516‭

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Q&A 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 ...

5 answers  ·  posted 3y ago by HA Harvey‭  ·  last activity 3y ago by HA Harvey‭

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Q&A 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 mov...

1 answer  ·  posted 3y ago by Marino Klisovich‭  ·  last activity 3y ago by Marino Klisovich‭

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Q&A What are the effects of a nearby supernova on a young solar system?

I'm building a S-Type binary system where the primary star is a black hole. Yet the system formed as a O + K-Spectral class binary and the 20 solar-mass O giant went nova 2,7 myr after both the sta...

1 answer  ·  posted 3y ago by TheDyingOfLight‭  ·  last activity 3y ago by TheDyingOfLight‭

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Q&A 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 ...

3 answers  ·  posted 3y ago by Canina‭  ·  last activity 3y ago by Canina‭

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Q&A 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. ...

3 answers  ·  posted 3y ago by Mr_Bober‭  ·  last activity 3y ago by Mr_Bober‭

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Q&A 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...

1 answer  ·  posted 3y ago by Blue Devil‭  ·  last activity 3y ago by Blue Devil‭

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Q&A 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...

1 answer  ·  posted 3y ago by Locaq‭  ·  last activity 3y ago by Locaq‭

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Q&A Possibility of a terrestrial moon orbiting a Jovian planet for the setting of a fantasy world

I am currently creating a world for a series of fantasy short stories (and hopefully movies one day), and I need some help with the science. Ideally, I would like the story to take place on a moon ...

4 answers  ·  posted 6y ago by Josiah.murphy‭  ·  last activity 3y ago by Josiah.murphy‭

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Q&A 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 ...

3 answers  ·  posted 3y ago by Thalassan‭  ·  last activity 3y ago by Thalassan‭

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Q&A What would be the effects on a planet orbiting a shedding red giant?

In a sci-fi RPG I eventually intend to run for a couple of friends, I had the idea of them visiting ancient ruins on a planet orbiting a shedding red giant. Now, ignoring the problem of intelligen...

1 answer  ·  posted 3y ago by Nobbe‭  ·  last activity 3y ago by Nobbe‭

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Q&A What factors affect how many moons a planet can have?

A moon is just a natural satellite - something orbiting a planet - so I'm interested in what kind of factors influence how many moons a planet can have, and how many moons a planet will actually ha...

4 answers  ·  posted 4y ago by Atlas‭  ·  last activity 4y ago by Atlas‭

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Q&A Plausibility of "diamond"-like crystal and/or mineral substances forming on a planet orbiting a dwarf star

Alright, so the primary inspiration for this is 55 Cancri e, the speculated carbon "diamond world" and to a degree, Nkllon, a planet in Star Wars that is essentially what Cancri is, but "confirmed"...

1 answer  ·  posted 4y ago by Primicerius Kaine‭  ·  last activity 4y ago by Primicerius Kaine‭

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Q&A 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?

6 answers  ·  posted 4y ago by Jae‭  ·  last activity 4y ago by Jae‭

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