1. AstronomyTop100.com Engineering Category

Here's your chance to speak out. What do you consider the top five greatest engineering marvels in astronomy and space exploration?

* 1. Please rank order your top five choices from 1 (your top choice) to 5 (your fifth choice)

  1 2 3 4 5
International Space Station (1998)
Spectrohelioscope (Pierre Jules César Janssen)
Radio Astronomy (1930s)
Viking Mars Landers (1975-1976)
Galilean Telescope (1609)
Ring Laser Gyroscope (1963)
Mir (1976)
Hubble Telescope (1990)
Communications Satellites (1962: Telstar)
Space Shuttle (1981)
Atomic Time (1972)
Weather Satellites (1960:Tiros 1)
Cassegrain Telescope (1672 N. Cassegrain)
Skylab (1973)
Pioneer Spacecraft (1958-1978)
Greenwich Mean Time (1884)
Mount Palomar 200” Mirror (1948)
Voyager Probes (1977)
Coronograph (1930: Bernard Ferdinand Lyot (1897-1952))
Telescope (1608: Hans Lippershey)
Mariner's Astrolabe (1295: Ramon Llull?)
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