Linked Questions

94
votes
6answers
22k views

Would a Moon made of water pose a threat to Earth during eclipses?

Is a moon made entirely of water possible? Could a planet made completely of water exist? I was inspired by the above questions to ask the following: Assume that our current Moon is replaced ...
37
votes
10answers
11k views

How can I destroy a gas giant planet?

We have already discussed how difficult it would be to blow up a planet like Earth, basically deciding that you can't do that with any reasonable amounts of energy. But what if I don't need to blow up ...
15
votes
3answers
825 views

What would the minimum mass of a water world need to be to form ice Vll, due to pressure, at its core? What about ice X, ice Xl, and higher?

I'm thinking of a planet in a Goldilocks zone similar to Earth's, with a similar atmosphere, and similar atmospheric pressure and temperature at the surface. Gravity would be variable, based on the ...
11
votes
3answers
3k views

Is a moon made entirely of water possible?

I have two earth clones, in essence, separated by *16550 miles (26350 kilometers). They are, of course, tidally locked, and orbit each other once every 24 hours. These planets orbit a sun identical to ...
12
votes
2answers
1k views

What would happen at the core of a water world?

If there existed a planet that was made completely of liquid water, no solid matter at all, what would the core of such a planet be like? Let's assume that this planet has conditions similar to earth, ...
9
votes
4answers
2k views

Must all planets have a solid/liquid core?

At the moment it seems we have two different types of planet We have Rocky planets with a solid core that occupies most of the mass of the planet We have Gas Giants that contain a solid core but are ...
4
votes
6answers
1k views

How large could a planet be yet still approach 1 Earth gravity and support life as we know it?

Life on Earth has developed with one Earth-gravity, more or less, as a constant for epochs. Our bones and organs both are adapted to this amount of pull, (or push, depending on how sciency you want ...
2
votes
3answers
378 views

A World Without Gravity and How it Would Work

Is there a way to either counteract the effect of gravity on a planetary scale or create a planet with a low enough density so as to replicate the effect of weightlessness? My world takes place on a ...
6
votes
2answers
164 views

Creating an Orbiting Sphere of Water

I was reading up on this question over here: Could a planet made completely of water exist? And I was wondering if it would be possible to haul massive amounts of water into space and put it into ...
-4
votes
2answers
186 views

What would happen if an errant icy planet impact an star with similar size?

The errant planet is similar in size with the star and it's made all of water. Usually is icy, but probably gonna melt when approach the star. What happens during the process of collision between the ...
-4
votes
1answer
285 views

What is world building? [closed]

personal psychological architecture / brain wiring ? society ? Our connection with others? natural world ? what kinds of worlds ?