Dyson's Sphere, a Dison Spike, and Other Variations

Dyson's sphere was originally proposed by freeman dyson as a swarm of orbiting bodies around a star. The concept has stuck in the popular imagination as a hollow shell around a star that people live inside, where the lit surface is more than a billion times that of earth. In the absence of some sort of artificial gravity, there would be no gravity on the surface of such a shell and those inside would fall into the sun,. followed bythe shell itself unless made of an impossibly strong and rigid material. So too, there is no night time inside such a sphere, which must then be wider than earth's orbit from the sun to avoid all those inside burning to death for this reason

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