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1 vote
0 answers
41 views

How to estimate the energy output of artificial suns

11 votes
2 answers
5k views

Could a planet have 1/2 the Earth’s mass but 1 g surface gravity?

3 votes
1 answer
73 views

How to build a gas giant?

0 votes
0 answers
102 views

I’m trying to imagine an Earth-like planet around Barnard’s star

7 votes
7 answers
2k views

Creating a second earth: How to make a continent?

5 votes
4 answers
449 views

What is the minimum specifications for a ship to survive propulsive reentry?

8 votes
7 answers
2k views

How do I calculate sea level on a planet with no seas?

6 votes
4 answers
696 views

Temperature on a 14-days day planet

5 votes
3 answers
2k views

White-hot tungsten moon emitting heat and light to make my world habitable

4 votes
1 answer
61 views

How would giant creatures that "live" underground shifting their limbs affect seismic activity

1 vote
1 answer
103 views

What would a hycean planet look like?

2 votes
2 answers
104 views

How could a planet stop spinning?

15 votes
6 answers
3k views

Planet with dual core

7 votes
2 answers
163 views

climate of a planet of only archipelagoes and shallow seas

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