视界

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Q:
How long did it take to make an image of a black hole?
A:
Observational campaigns in both April 2017 and April 2018 were conducted over five observing nights. These data were recorded when the major target sources were optimally observable by …
A:
Observational campaigns in both April 2017 and April 2018 were conducted over five observing nights. These data were recorded when the major target sources were optimally observable by night and...
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