[david-given]

You just need a big enough ship.

A while back I had a plan for a science fiction setting: an intergalactic ship is approach Earth. The people who sent it thought big, and as a result the ship has at its core an enclosed star (a miniature Dyson Sphere) as a gravitational anchor and power source, and round it is orbiting a vast swarm of asteroids and habitats with a few million times the living space of Earth, inside which civilisations endlessly rise and fall.

The plot centred around this thing going to make a class pass by Sol in a few years at 0.01c, with the gravitational effects pretty much dooming the Earth; so the current lead civilisation sends some ships on ahead to evacuate the Earth. (Big ships. I did the maths.)

The story never gelled, but I think it's plausible that my ship would produce these effects.

BTW, if this turns out to be true, I want credit.

[lnanek2]

You might enjoy some of Liu Cixin's stories, which are often similar to that: https://www.amazon.com/Wandering-Earth-Classic-Science-Colle...

[phonon]

https://en.wikipedia.org/wiki/Nemesis_(Asimov_novel)

is kinda similar

[mk-61]

Yet another book recommendation:

Terre en fuite (Fleeing Earth) (1960) by François Bordes (pen name Francis Carsac), though, there is still no translation in english of that gem, where Earth and Venus was converted to spaceships for running away from exploding Sun!

[c0g]

Yet another book recommendation: Marrow by Robert Reed. Some similarities to your story :)

[brador]

Wouldn't the ship collapse under it's own gravity?

[goombastic]

Or maybe we are the ones traveling to the star.

[rralian]

Keep it up! I'd read that.

[kordless]

> if this turns out to be true, I want credit

You cool if we blame you too? :)