Page:A Voyage in Space (1913).djvu/131

You probably want to know how much these huge telescopes will magnify, and you may be surprised at my answer, "As much as ever you like;" but that is the actual fact. Fig. 29. Any telescope can be made to magnify a thousand times, say, but it does not follow that you will be pleased with the result. The magnifying depends partly on the big lens or mirror about which we have been talking and partly on the "eyepiece," the little lens you put your eye