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3 votes
6 answers
1k views

Plausible orbit to have a visible object slowly circle over the night sky

I want to have the inhabitants of a particular world - doesn't have to be a planet, can be a moon - be able to see a certain point of light - can be a planet, moon, star, whatever - moving in the sky ...
Locaq's user avatar
  • 739
0 votes
1 answer
165 views

Looking for a Specific Planet

I know my title isn't the most specific, but the planet I am looking for is. I have been looking through many exoplanets and I can't seem to find what I am looking for, the closest I have found is ...
Amoeba's user avatar
  • 3,743
9 votes
4 answers
743 views

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 ...
Failus Maximus's user avatar
7 votes
1 answer
364 views

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 ...
Nobbe's user avatar
  • 314