This dimension groups observatories by the part of the electromagnetic spectrum they are built to observe, such as radio, infrared or X-ray. Wikipedia notes that the spectrum divides, "from low to high frequency," into "radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays." Browsing by observing band collects every observatory built to study the same kind of radiation.
Facts
Comparison
Field Origin Era Observing Band
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.
Encyclopedia Britannica: Space Exploration
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