- #1
DarkMattrHole
- 35
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- TL;DR Summary
- Or, exactly where is the event horizon now?
Let's say there is a black hole billions of miles away from earth, a hefty one such that a careless traveler could end up inside the horizon before noticing he'd been swallowed by the BH. Based on Earth observations the BH event horizon radius is r. We hop in a ship and go to a safe escape distance but so close that only our powerful engines can hover over the event horizon to take measurements before returning home - from our hovering ship we measure the radius of the event horizon again - do we read the same radius r as we did from earth? Other? thanks.