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: History of the telescope
Wikimedia FoundationHistory of the telescope, lead sectionQuote, History of the telescope, lead section
The history of the telescope can be traced to before the invention of the earliest known telescope, which appeared in 1608 in the Netherlands, when a patent was submitted by Hans Lippershey, an eyeglass maker.
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