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I was staring up at the stars around 11:30 PM and noticed an object moving. It had no lights, and was not bright whatsoever. It was moving smoothly and in a straight line, except extremely fast, and dead silent. It was fairly large too, compared to how big stars look. Never would have noticed it had I not been looking at that particular region of the sky at the exact moment I did. It had to have crossed the sky in less than a minute. In fact, I feel like I've seen this same kind of thing once or twice before.

My question is what did I see? The fact that it was extremely dim, extremely fast, and produced no sound really confuse me.

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closed as too broad by J. Chomel, James K, StephenG, Sir Cumference, called2voyage Oct 30 '17 at 13:19

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

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    $\begingroup$ Possible duplicate of Unknown moving objects $\endgroup$ – J. Chomel Oct 27 '17 at 6:19
  • $\begingroup$ also related astronomy.stackexchange.com/questions/11634/… $\endgroup$ – J. Chomel Oct 27 '17 at 6:23
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    $\begingroup$ Was the object point-like? I don't understand how a point can be "not bright" and "fairly large", as "big" stars only differ from small ones in brightness. $\endgroup$ – James K Oct 27 '17 at 8:20
  • $\begingroup$ Blimps can move fairly quickly. Usually have running lights though. Are you in an area they frequent? $\endgroup$ – Wayfaring Stranger Oct 28 '17 at 16:11
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At first blush, this sounds like it was a large, low-Earth orbiting satellite, like the ISS for example. Depending upon the angle above the horizon the transit time could be very low s you described. Your position would determine whether the satellite was illuminated by the Sun or not at that local time.

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My guess, as @Tim said, is the ISS. I've seen it a few times, and it looks exactly as you've described. There are a few websites and mobile apps that can inform you of any satellites that are passing over your position; my go-to is heavens-above.com.

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