1.   But large telescopes are in great demand and are often booked up months in advance.

2.   Photographs taken with large telescopes are needed to bring out their vivid colours, and with binoculars they appear white and milky.

3.   Although the technique is used at many large telescopes, it has been limited because of the small number of natural guide stars in any region being observed.

4.   Astronomy Village opens with the sky darkening over a mountaintop village, with a large telescope dome in the center.

5.   Betelgeuse is so big and so relatively near the Earth that large telescopes can actually detect features of its surface.

6.   A large telescope sends the burst of light and receives it, too.

7.   But having a fixed mirror also made the instrument far less expensive than other large telescopes.

8.   But the event, which thrills astronomers, could disappoint laypeople who lack large telescopes, experts warn.

9.   It is not one instrument but actually a planned complex of four equally large telescopes and three smaller ones.

10.   On the dark beach we stumbled into a large telescope in front of a circle of chairs filled with children and their parents listening to an astronomer.