Because it's not massive enough.
That tiny little pixel between the Moon and the Death Star II is what we're talking about. It's roughly the same size as Pluto’s moon, Hydra (far right), which is highly irregular…
Objects such as planets and moons are only spherical when they are massive enough for their gravity to pull them into a sphere.
The Death Star is the same size as Hydra, but it's also very hollow— filled with rooms and tunnels, and the reactor.
In short, its mass is hardly noticeable when compared to a solid object of the same size whose own gravity isn't even sufficient enough to pull itself together. A human on Hydra? One jump and they're hurtling through space.
The Death Star 2 is a bit more problematic.
While still hollow (and not even finished), it's about the size of Charon, Pluto’s largest moon.
Charon’s surface gravity is 0.288 m/s^2. The picture shows us that that's enough to pull it into a sphere.
I’ll assume the DS2 has about 1/3 of Charon’s material (hollow and incomplete).
Now, I’ll look up the smallest possible size for something that can be pulled into a sphere…
400–600 km diameter.
Charon’s diameter is…
1,212 km.
Okay, so Charon is about 2–3 times the minimum size of a spherical body.
The DS2 would be hovering around the sphere threshold if it were packed together, but probably way lower.
So, no, the Death Stars aren't going to collapse under their own gravity. For the second one, there might be a bit of a tug close to the surface, but it shouldn't be a problem once the Earth-level artificial gravity (in a different direction) kicks in.
Read other answers by Joe French on Quora:
- Who wins in a battle between Kylo Ren and Darth Maul? Is it even close?
- What is your review of Rogue One: A Star Wars Story (2016 movie)?
- Is "The Force" in Star Wars the fifth fundamental force of the universe?
from Quora http://ift.tt/2kWdZ8R
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