Personal project:
Some rough idea I had a while ago, how to make an alternative to the rotating donut in order to achieve gravity. Somewhat in the realm of making a remote sense.
So the most logical thing is carrying earth with you.
Then I thought of a neutron star - turning earth into one (hypothetically) which is much much smaller in size, same in mass.
But then the gravity that we have now will remain where it is, at the same distance from the center. When you will move closer to the center the gravity goes increasingly higher (unlike with our current situation where moving toward the center results in the gravity to reduce due to equal pull in all directions.)
So what if I reduce the neutron earth's mass, so much that my orbit with earth's gravity would reduce to be at 1km radius, Still crazy but I figured it's easier than moving the full mass of earth 
So my father pointed me to some formulas and I did some calculations to find out the mass and the radius of the core I need for my space station/ship.
First had to figure out the mass I need to have earth equivalent gravity at 1km distance from the core. Then I had to calculate the volume, and then the sphere. It still wouldn't be possible due to logistics and the intense gravity at the surface of the core and many many other astrophysical, engineering, physics and other reasons - but here it is
Basic calculation process
Neutron Starship
Published:

Neutron Starship

Published:

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