Astronomy in the 18th Century
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Description: Discusses the development of reflective telescopes during the 1700's. Covers the different types of mirrors and lens that were used during these times. Includes some key contributors to the improvement of the telescope during this period.
size>color>color> Harrison's scientific work. Astronomy in the 18th Century, longitude, fuzzy blobs and the astronomers drinking song To avoid the problems arising by the use of glass lenses in refractors, mirrors could be used - to make a reflector telescope. Light from the stars passes down the telescope to the concave surface of a mirror at the far end. From this, the primary mirror, the light is reflected back to a focal point down the telescope. If the telescope was big enough, the astronomer could perch here.
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| Date | Creation Date: 06-nov-2008 Expiration Date: 06-nov-2014 |