Questions tagged [planets]

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

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1answer
290 views

Could plant life evolve on a world with a toroidal magnetic field?

Let us assume that my new world has within its rings, shells, and blobs of remarkably cool magnetically-involved stuff such that its magnetic field is toroidal (shaped like a donut) rather than ...
4
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4answers
776 views

How far above the pole would you need to be for constant sunlight?

In theory I believe that if you moved far enough above the surface of the pole you should be able to reach an area where you have constant sunlight, even in the middle of winter. My question is - how ...
3
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1answer
277 views

Conditions of a more ideal version of earth

What would be the specific conditions required for a planet to be a more ideal version of Earth? I want the world to have a much larger proportion of land covered by lush jungle and forest ...
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2answers
599 views

How do solar eclipse(s) work(s) in a binary stars system?

Say a terrestrial planet is orbiting two stars as if they're a single gravitational well.(I haven't worked out the distance yet as I still on the phone...) I don't need the planet to be habitable but ...
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3answers
1k views

What is the highest possible mountain on an Earth-like world?

My friend is writing a book, and I volunteered to create a planet for him, one with an epic mountain extending far above the clouds. The planet features lush jungles in the lower elevations and ...
3
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1answer
528 views

Nitrogen oxide atmosphere

We all know that Titan has an atmosphere that consists mainly of N2. What I want to have is a planet with an atmosphere that consists mainly of various nitrogen oxides (NO, NO2, N2O). My questions ...
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0answers
101 views

Can you have an eccentric horseshoe orbit for long? [duplicate]

I'm going to keep it simple, so I can maybe get an answer. Can you have two habitable terrestrial sized moons of a gas giant or brown dwarf in a stable horseshoe orbit (50+ million years) that is also ...
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4answers
605 views

Could a human colony persist long term on a planet with limited food and water resources?

Suppose a highly tectonically active planet, slightly smaller than Earth, has attracted the human race's attention due to its mineral wealth. Its landscape primarily consists of mountain chains, ...
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2answers
85 views

Time in relation to life in the Jovian System

I'd just like to preface this with the fact that I'm super new and I apologise if this has been discussed in some way previously (I have looked at similar topics but they haven't quite given me the ...
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2answers
260 views

What distances would be involved in this planetary system?

So, I have five habitable planets in my planetary system. These five planets are all in the Goldilocks zone, orbiting their star. However, only two are relevant to this question. The star is exactly ...
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1answer
370 views

What is the largest planet size that can be pushed out of orbit?

This is a spin off from this question here. I want a spaceship or several spaceships to be able to move a planet out of its orbit around another planet. How big could the planet realistically be ...
2
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1answer
398 views

How could a TINY Second Moon minimally affect Earth? [duplicate]

So I found this site through this other question asking generally about what Earth would be like with two moons. However, these responses, like pretty much everything else I've been able to find ...
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3answers
604 views

What happens when a tidally-locked planet breaks out of the synchronous rotation?

Say you've got a hypothetical human-colonized planet planet roughly the size and composition of Earth orbiting around an M-class star a third the size of the sun at 0.2 AUs. Due to the proximity, this ...
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2answers
472 views

Dimensions of an O'Neill cylinder with gravity and coriolis force like surface of Earth

What would be the diameter and rotational speed of an O'Neill cylinder on the inside surface of which centrifugal and coriolis forces are equal to "gravity" and coriolis force on the surface of Earth ...
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3answers
586 views

How would möbius strip planetary ring system be possible?

Long story short I need a unique ring system around a Jovian planet and thus I think of möbius strip. Can a gas giant have a ring system shaped like möbius strip exist naturally? Why do I post such ...
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4answers
332 views

Creating a stable split earth

So having read a couple of other questions on here, and postulating over this for a while, here's my question. Is it possible to have two magnetars in a distant binary orbit, with an earthlike planet ...
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1answer
518 views

What if an Earth-like planet had rings? [closed]

I use "Earth-like" in this instance to describe an alternate world with conditions to lead to the evolution of humans. This planet is not Earth and exists in a different system or galaxy entirely. For ...
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6answers
264 views

What would it take to knock a whole planet to 90 degrees of inclination relative to the sun?

Pluto is inclined in a way that makes it slightly off the orbital plane of all the other planets and sun. Could you have a planet that was inclined at 90 degrees, or at least close to that? What would ...
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2answers
2k views

Could humans breathe on a planet that had a liquid hemoglobin (or some artificial blood substitute) atmosphere?

This is about a fictional planet that has a solid land surface but on which the atmosphere is composed of some liquid containing hemoglobin, or some artificial blood substitute. I am not sure yet if ...
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2answers
178 views

Planetary crash scenario

Exploring this new star system you have been pretty lucky to find an Earth like planet, with plenty of Oxygen, both in gaseous and in chemically bonded state (water, rocks, etc.). Just before you ...
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1answer
129 views

Is a Niven-esque toroidal planetismal really possible? And stable? [duplicate]

In one of Larry Niven's books about Pak Protectors, one of the Pak creates a toroidal planet using artificial gravity (and no doubt some other Pak techno-magic). Protector: Toroidal Planet: Would ...
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1answer
238 views

Is it possible for a planet to orbit a binary system at the same speed as the stars themselves?

I know next to nothing about astrophysics, but I've read a few Wikipedia articles, and it seems like a "normal" kind of binary system includes two stars of similar mass orbiting a common center. I ...
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3answers
421 views

What would happen if an earthlike planet is eclipsed by another planet for a few hours or days? [closed]

Okay, so I have an earthlike planet and another, bigger planet which orbits the sun really slowly and once every few millennium it crosses in front of the earthlike planet, blocking out the sun. would ...
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1answer
176 views

Methanol/Ethanol (other alcohol) based life-form and its planet? [closed]

This is the second part of my first question, where I've asked about an alien-civilization which uses methanol/ethanol/other alcohol as a solvent instead of water. In this question, I'm more ...
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1answer
210 views

Is my habitable system possible? [duplicate]

I have a star system of large red dwarf around 50% of sun's mass, which has gas giant or ice giant orbiting in the habitable zone. The gas(ice) giant has terrestrial like moon which is habitable. That ...
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3answers
83 views

Would Such an Axial Tilt Exist on These Worlds? [closed]

In this scenario, there are two Earth-sized planets orbiting one same sun, but they are literally as different as day and night. Both have a 48-hour rotation, but: Planet A has a polar winter in ...
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1answer
116 views

What could prevent a planet from possessing magnets/electricity?

Without changing a planet from being habitable for humans and keeping a similar ecosystem why could intelligent races never access electricity? What systems need to be erased from the planet to not ...
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1answer
279 views

Would this Planet be habitable for humans

I Was playing space engine and i was looking for a planet like Earth for quite some time and then i stumbled on this beautiful world covered with liquid water which orbited a main sequence star with 8 ...
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1answer
2k views

What would happen if the earth starts burning? [closed]

What would happen if the earth lights up on fire? Like this picture below: The earth is burning is it gonna explode or maybe even melt? What would happen to the water? Is it gonna boil? What if ...