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12 votes
5 answers
3k views

Do seasons occur on a tidally-locked planet?

2 votes
2 answers
201 views

What astronomical situation could account for the PERCEPTION of a very erratic day / night cycle for a planetbound population with limited science?

0 votes
1 answer
143 views

Various eclipses in a P-type binary star system?

2 votes
1 answer
106 views

What's the maximum mass for an Iron Planet to have a magnetosphere like Mercury's?

3 votes
2 answers
176 views

Could Moon Phases work in a Concave Hollow-Earth?

1 vote
1 answer
149 views

Continent Formation and Volcanos

3 votes
1 answer
206 views

What would a rough estimate of the global climate of an earth be like if lit by a geosynchronous ring instead of a point source?

10 votes
20 answers
5k views

How Do I Keep the Population of an Ecumenopolis Reasonable?

5 votes
1 answer
1k views

Could this hypothetical Super-Earth support human life?

8 votes
3 answers
724 views

Could this hypothetical Sub-Earth support human life?

3 votes
0 answers
79 views

How much difference would Alpha Centauri A cause to the climate of a planet about Alpha Centauri B?

3 votes
2 answers
853 views

How would weather work on a planet with no rotation and constant sun on all sides?

17 votes
11 answers
4k views

What could lead a large ocean on a planet's surface to recede completely only to reappear later on in a cyclical process?

7 votes
3 answers
1k views

Could a planet realistically share an orbit with Jupiter?

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