All Questions
Tagged with stars earth-like
22 questions
2
votes
2
answers
262
views
A calendar/timekeeping system based only on the stars?
I'm playing with an otherwise earthlike world where I have handwaved away the visible sun and moon: anytime you look at a cloudless sky, you see stars, and only stars. How can the people of this world ...
- 1,000
1
vote
1
answer
5k
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What Would the Sky Look Like If the Sun Were a Different Color (And Still Half a Degree Wide)? [duplicate]
This question has been asked many, many, many times--what would the sky look like if the sun were a different color? But the mistake I keep seeing is that they used actual stars and imagined Earth as ...
- 14.9k
0
votes
1
answer
242
views
Alternative earth-like planet environment that supports human life
So i want to create a planet that supports human life. Primarily, i would need to consider a star type, an atmosphere, foliage pigment, and potentially different types of plants. Think of it as a sort ...
3
votes
1
answer
123
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Distance required for a Red Giant Star to have an apparent magnitude of -13
Assume this Red Giant has the properties of Aldebaran (α Tauri in constellation Taurus) with an absolute visual magnitude of −0.641M. How far would it have to be from Earth in order to possess an ...
- 375
9
votes
4
answers
740
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How far should second star be in my binary system?
For a certain reason, I needed two habitable similar earth-like planets very close to each other. After various information gathering, I gave up on double planet and gas giant moons, because tidal ...
- 3,649
6
votes
2
answers
213
views
Life without a bright star?
The main source of free energy that allowed life on Earth to develop was our sun. It bombards the planet’s surface with photons of high energy, which provide activation energy for reactions necessary ...
- 3,351
1
vote
1
answer
2k
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What Star would encourage what color of plants? or, a table of star types to the most efficient plant color [duplicate]
Using the following list of stars, what color is the most efficient for plants to absorb the ideal amount of energy?
(This is not a complete list of star types, just some big examples)
Yellow Dwarf ...
- 211
3
votes
3
answers
344
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Which Stars Would Best Suit For the Habitable Zone of The Nine Norse Earths?
In an alternate universe, the nine realms of Norse mythology--Midgard, Asgard, Vanaheimr, Jotunheimr, Alfheimr, Hel, Nidavellir, Niflheim and Museplheim--are actual, real-life "Earths", in the sense ...
- 14.9k
7
votes
1
answer
364
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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 intelligent ...
- 314
9
votes
3
answers
566
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How to navigate a ringed planet at night?
I'm working on a story set in an Earth-like world but with rings (say, proportionately similar to Saturn's). I'm trying to get a solid handle on how these rings would affect the sky. For the ...
- 339
1
vote
4
answers
138
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Optimal arrangement for habitable zones?
So, here's my issue.
My setting's central conceit is that a myriad of human societies developed at relatively concurrent times across a large system separated by only a few light-hours. (There are, of ...
- 439
2
votes
1
answer
279
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A K-Type Binary Dawn/Dusk in the Equator
In this alternate scenario, Earth is the third planet in a binary star system. One star is a K-type main sequence star--or "orange dwarf"--that has 80% the mass of a G-type main sequence star--or "...
- 14.9k
2
votes
1
answer
1k
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Earth Orbits a K-Type Star. What Would the Visual Scenery Look Like?
To clarify on the title, K-type main-sequence stars--shortened as "orange dwarves"--are subjects of excitement for astronomers and astrobiologists.
Why?
They emit enough radiation to provide a ...
- 14.9k
5
votes
2
answers
732
views
Could life on earth survive after the sun becomes a white dwarf?
It's my first time writing an original story and I have this idea, but I don't know if it could be scientifically feasible. My story would be medieval fantasy with magic, but I wanted to add a twist ...
- 51
4
votes
4
answers
605
views
Is a 1:1 Earth possible in a binary system?
I'm trying to build as close to a 1:1 Earth as possible, but finding information on a non-jovian moon-based planet is extremely hard to find. I tend to ramble trying to explain things in a non-list ...
- 189
2
votes
1
answer
2k
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How far away does a planet need to be from its star to have Earth-like conditions?
So, for the sake of this question, let's pretend that this hypothetical planet has a similar or the same atmosphere, tilt, gravity, size, and mass as Earth. If you switch out the star--say to a blue, ...
- 2,300
7
votes
4
answers
714
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What will happen after I use a light swich to turn off the Sun? [duplicate]
I was recently looking at the control panel for the Universe Simulation, and I noticed a switch labeled
Sun - On/Off
I don't really want to turn off the sun without knowing what would happen.
...
3
votes
4
answers
2k
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a habitable planet orbiting a Neutron Star that moves through galaxies
Is it possible for a earth-like planet to orbit a neutron star & have intelligent life-forms, even if said neutron star 'moves' through different galaxies?
as seen in this video - https://www....
- 465
19
votes
2
answers
1k
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Could animal life develop on the TRAPPIST-1 planets?
Recent news reported the discovery of three "earth-like" planets in the TRAPPIST-1 system. This is interesting because the star is a small, cool red dwarf about the size of Jupiter. The three ...
- 19.6k
15
votes
2
answers
2k
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Orbiting one star in a binary system: what are the effects of the second star on the planet?
This blog post about binary-star systems points out that, rather having the stars be close together, they could be far apart and a planet might orbit just one of them. It gives the example of the ...
- 19.6k
15
votes
6
answers
3k
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Do different star types produce plants with different properties?
From this chart it appears that the star types closest to our own are K-type (oranger, a little cooler, and less than half as bright) and F-type (bluer, a little warmer, and much brighter). If I want ...
- 19.6k
21
votes
5
answers
3k
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What kind of star should I use for my world?
If I want an Earth-like planet, what kind of star can I use to achieve that ?
According to the Harvard stellar classification, our Sun is a G-class star.
The best would be to have:
Temperature ...
- 16.9k