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How far can we see?

Have you ever been asked how far can you see in a telescope? This article helps answer that question and also covers how far you can see with the naked eye and a pair of binoculars.

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Where are the satellites?

Where are the satellites? We hear a lot about GPS, Hubble, the ISS and a load of other satellites, but not often where they are or much about how they got there, or how they stay there.