Special relativity shows that any accelerated observer(adsbygoogle = window.adsbygoogle || []).push({});

sees an event horizon. In fact, if an observer is accelerated

by a, the horizon is at distance l=c^2/a in the direction

opposite to a.

If an observer is on a carousel or merry-go-round,

he is accelerated inwards. Does he then see a horizon

on the outside?

If so, does a horizon also appear for an observer in orbit,

thus when circling the earth or the sun?

Hz

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# Does an observer on a carousel see a horizon?

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