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VERSION:2.0
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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20090126T000000
DTEND;TZID=Atlantic/Canary:20090126T010000
UID:iactalks-172
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/172
CREATED:2009-01-26T00:00:00+00:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:On the invention of the telescope and the paintings of Jan Brueghel
DESCRIPTION:On the invention of the telescope and the paintings of Jan Brue
 ghel\nDr. Paolo Molaro\n\nJan Brueghel depicted telescopes in four paintin
 gs spanning the period between 1609 and 1621. We have investigated the nat
 ure and the origin of these telescopes. An optical "tube" that appears in 
 the painting dated 1608-1612, and probably reproduced also in a painting o
 f the 1621, represents one the earliest documentation of a Dutch spyglass 
 which could even tentatively attributed to Sacharias Janssen or Lipperhey,
  thus prior to those made by Galileo. Other two instruments made of severa
 l draw-tubes which appear in the two paintings of 1617 and 1618 are quite 
 sophisticated for the period and we argue that may represent early example
 s of Keplerian telescopes.\n\n
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