This dimension separates observatories by their physical platform, a ground-based site, an aircraft or a spacecraft in orbit. Wikipedia notes that "some people still prefer to restrict the term to astronomical observatories," though the same word covers instruments on the ground and in space alike. Browsing by platform keeps ground-based and space-based observatories in their own separate groups.
Facts
Comparison
Field Origin Era Platform
Sources
1. Wikipedia: Radio telescope
Wikimedia FoundationRadio telescope, history sectionQuote, Radio telescope, history section
Radio waves from space were first detected by engineer Karl Guthe Jansky in 1932 at Bell Telephone Laboratories in Holmdel, New Jersey using an antenna built to study radio receiver noise.
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