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1. The world's most powerful optical reflector telescope has a
primary mirror composed of 36 hexagonal segments each 1.8m in size.
Theoretically, it would be able to separate a car's headlights at a
distance of 25,000 km. ____________
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A. The Australia Telescope, Parkes, Siding Spring and Culgoora, Australia; Usuada and Kashima, Japan; the HALCA satellite
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2. This is the world's largest optical instrument for solar research;
its primary mirror is 2.1meters in diameter. ___________
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B. The VLA (Very Large Array) near Socorro, N.M.
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3. The largest metal-mirror reflector is the 1.83m reflector set up by the third Earl of Rosse in 1845. __________
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C. Arecibo Radio Telescope, Arecibo, Puerto Rico
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4. One of the world's most powerful radio telescopes consists of 27
separate mobile antennas each 25 m in diameter. The antennas are
situated along a Y-shape, with each arm of the "Y" up to 20.97km long.
__________
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D. Gemini North Telescope, Mauna Kea, HI
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5. The world's largest planetarium can seat 300 people. Its
30m-diameter dome can project over 25,00 stars at a time. ___________
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E. Special Astrophysical Observatory, Zelenchukskaya, Russia
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6. It weighs 850 tons and has a 6-m diameter reflector. Until late 1998,
it was the largest single mirror telescope in use.___________
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F. The W. M. Keck Telescope, Mauna Kea, HI
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7. This 305m-diameter single dish radio telescope is used by Project
Phoenix to conduct the world's most comprehensive search for
extraterrestrial intelligence. ____________
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G. Ehime Prefectural Science Museum; Niihama City, Japan
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8. This 2 billion-dollar instrument is the most complex and sensitive
space observatory ever built. It weighs 11,000kg and standing upright
would look like a 5 story building. ________
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H. Edwin P. Hubble Space Telescope
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9. This was the first of twin 8-m telescopes that together can explore
the entire northern and southern skies in optical and infrared light. It
was built by an international partnership of eight nations.__________
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I. McMath-Pierce Solar Telescope; Kitt Peak, AZ
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10. The largest radio installation includes dishes on two continents as
well as a satellite link. It is equivalent to a radio telescope with a
diameter of 27,584km. _________
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J. Birr Castle Telescope; County Offaly, Ireland
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