The Telescope
description
Transcript of The Telescope
![Page 1: The Telescope](https://reader035.fdocuments.in/reader035/viewer/2022062301/56816231550346895dd26551/html5/thumbnails/1.jpg)
The Telescope
by Pavitthra Pandurangan
![Page 2: The Telescope](https://reader035.fdocuments.in/reader035/viewer/2022062301/56816231550346895dd26551/html5/thumbnails/2.jpg)
What is the telescope?
An object used to make distant objects appear closer using a series of curved mirrors or lenses.
![Page 3: The Telescope](https://reader035.fdocuments.in/reader035/viewer/2022062301/56816231550346895dd26551/html5/thumbnails/3.jpg)
• 2,000 years ago - evidence of lenses.• 1608 - Hans Lippershey invents the first
refracting telescope.• 1609 - Galileo invents an improved model.• 1670 - Isaac Newton invents the modern
reflecting telescope.
A Basic Overview
![Page 4: The Telescope](https://reader035.fdocuments.in/reader035/viewer/2022062301/56816231550346895dd26551/html5/thumbnails/4.jpg)
• 1470: Born in Wesel, in western Germany
o A German - Dutch lens-maker• 1508: Filed for patent for his telescope, but
was denied.o Magnification was three times.o Compensated by Dutch government for
providing binocular telescopes.
Hans Lippershey
![Page 5: The Telescope](https://reader035.fdocuments.in/reader035/viewer/2022062301/56816231550346895dd26551/html5/thumbnails/5.jpg)
• February 15, 1564: Born in Pisa, Italy.o Italian physicist and astronomer.
• 1592: Taught mathematics at University of Padua.o Studied Ptolemy.o Convince that Nicolaus Copernicus' theory
(planets revolve around the sun) is correct.• 1609: Heard about the telescope. Learned
more about it, and created an improved model by himself.o Thought of pointing this invention to the skies,
rather than using it in war. o “The Father of Modern Astronomy”
Galileo Galilei
![Page 6: The Telescope](https://reader035.fdocuments.in/reader035/viewer/2022062301/56816231550346895dd26551/html5/thumbnails/6.jpg)
What he saw:
Mountains and craters on the moon. Moons of Jupiter (four largest). Milky Way is a collection of stars. Dark spots on the surface of the Sun.
Published discoveries in March 1610 in The Starry Messenger.
Galileo’s Findings
![Page 7: The Telescope](https://reader035.fdocuments.in/reader035/viewer/2022062301/56816231550346895dd26551/html5/thumbnails/7.jpg)
Known as the refracting telescope. Magnification of twenty times. Parts:
Objective Lens – collects light from a distant object and focuses it into one point.
Small Lens – the eyepiece, brings image to your eye.
This version is not used in modern day astronomy because the lenses are too expensive to reproduce.
Galileo’s Telescope
![Page 8: The Telescope](https://reader035.fdocuments.in/reader035/viewer/2022062301/56816231550346895dd26551/html5/thumbnails/8.jpg)
Convex lens collects and bends light to a focus point.
A concave lens magnifies the image.
Galileo’s Telescope
![Page 9: The Telescope](https://reader035.fdocuments.in/reader035/viewer/2022062301/56816231550346895dd26551/html5/thumbnails/9.jpg)
January 4, 1643: Born in Woolsthorpe. 1661: Attended Cambridge University.
Read about optics and light. Investigated the refraction of light.
1688: Developed the reflecting telescope
Isaac Newton
![Page 10: The Telescope](https://reader035.fdocuments.in/reader035/viewer/2022062301/56816231550346895dd26551/html5/thumbnails/10.jpg)
Idea was from Scottish mathematician James
Gregory, who came up with the design in 1663.
Used two mirrors instead of glass lenses. Primary Mirror: Curved, metal mirror Secondary Mirror: Small, flat mirror
Less chromatic aberration (fringes of color against the boundaries between light and dark) since wavelengths focus at one point.
Helpful for viewing dark objects.
Newtonian Reflector
![Page 11: The Telescope](https://reader035.fdocuments.in/reader035/viewer/2022062301/56816231550346895dd26551/html5/thumbnails/11.jpg)
A large, concave mirror collects and reflects the incoming light. Then a flat mirror focuses the light and reflects it to the eye piece. The eye piece then magnifies the image.
Newtonian Reflector
![Page 12: The Telescope](https://reader035.fdocuments.in/reader035/viewer/2022062301/56816231550346895dd26551/html5/thumbnails/12.jpg)
• Scientists accepted that the Earth was not the center of
the galaxy. • The Sun and Moon aren’t perfect cellestial objects.• Examine stars, planets, galaxies, space, etc.• Look at our universe in different wavelengths (gamma,
infrared, radio).• See beyond what we can now, and understand the
universe.• Creation of famous telescopes like the Keck Telescope,
the Kitt Peak Observatory, and the Hubble Space Telescope.
Impact
![Page 13: The Telescope](https://reader035.fdocuments.in/reader035/viewer/2022062301/56816231550346895dd26551/html5/thumbnails/13.jpg)
"Galilei, Galileo." World Book's Biographical Encyclopedia of Scientists. Vol. 3. Illinois: World Book, 2006. 117-
19. Print. ^“Rigden, John S.” Macmillan Encyclopedia of Physics. Vol. 2. New York: Simon & Schuster Macmillan, 1996.
647-49. Print. Strano, Giorgio. "Galileo’S Telescope: History, Scientific Analysis, And Replicated Observations."
Experimental Astronomy25.1-3 (2009): 17-31. Academic Search Premier. Web. 27 Nov. 2012. "Galileo." (n.d.): Funk & Wagnalls New World Encyclopedia. Web. 27 Nov. 2012. Shubinski, Raymond. "How The Telescope Remade The Universe. (Cover Story)." Astronomy 37.5
(2009): 30.MasterFILE Premier. Web. 27 Nov. 2012.
http://www.biography.com/people/galileo-9305220 http://csep10.phys.utk.edu/astr162/lect/light/refracting.html http://www.history-of-the-microscope.org/hans-lippershey-invented-the-telescope.php http://www.robinsonlibrary.com/science/astronomy/instruments/lippershey.htm http://www.egglescliffe.org.uk/physics/astronomy/telescope/newtontele.html http://www.newton.ac.uk/newtlife.html https://www.google.com/#hl=en&sugexp=les
%3Bcrnk_timediscountc&gs_nf=3&gs_rn=0&gs_ri=hp&tok=0VxsiR2Qa5ogwAkdHbtiuw&cp=12&gs_id=1k&xhr=t&q=telescope+definition&pf=p&tbo=d&output=search&sclient=psy-ab&oq=telescope+de&gs_l=&pbx=1&bav=on.2,or.r_gc.r_pw.r_cp.r_qf.&fp=590195a7cf0fc162&bpcl=39580677&biw=1280&bih=933
Sources