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Welcome to the UM Observatory

Welcome to the UM Observatory, where you can learn all about telescopes. Take a pop quiz on telescope history, types, and purposes, and discover why astronomers choose remote mountains for telescope placement. Find out where not to buy a telescope and explore useful websites for more information.

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Welcome to the UM Observatory

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  1. Welcome to the UM Observatory All About Telescopes!

  2. Pop Quiz! • Thanks to Dr Pound for the basis of this presentation!

  3. Who invented the telescope? • Galileo

  4. Who invented the telescope? • Galileo • Some Dutch guy

  5. Who invented the telescope? • Galileo • Some Dutch guy • Isaac Newton

  6. Who invented the telescope? • Galileo • Some Dutch guy • Isaac Newton • Bill Gates

  7. Who invented the telescope? • Galileo • Some Dutch guy • Isaac Newton • Bill Gates

  8. Which of these is a type of telescope? • Refracting

  9. Which of these is a type of telescope? • Refracting • Reflecting

  10. Which of these is a type of telescope? • Refracting • Reflecting • Exploding

  11. Which of these is a type of telescope? • Refracting • Reflecting • Exploding • a & b

  12. Which of these is a type of telescope? • Refracting • Reflecting • Exploding • a & b

  13. The purpose of a telescope is ? • Magnify distant objects

  14. The purpose of a telescope is ? • Magnify distant objects • Gather light

  15. The purpose of a telescope is ? • Magnify distant objects • Gather light • Employ astronomers

  16. The purpose of a telescope is ? • Magnify distant objects • Gather light • Employ astronomers • a & b

  17. The purpose of a telescope is ? • Magnify small objects • Gather light • Employ astronomers • a & b • f =focal length – the distance it takes for light to come to a focus after refracting through a lens or reflecting off a mirror • a =aperature – the diameter of the main (objective) lens or mirror (primary) • magnification = fscope/feyepiece • F/ratio = f / a • LGP = area of objective/area of pupil (eye)

  18. The purpose of a telescope is ? • Magnify small objects • Gather light • Employ astronomers • a & b Focal lengths Mag = areas LGP =

  19. True or False:These are all kinds of light • X rays

  20. True or False:These are all kinds of light • X rays • Radio waves

  21. True or False:These are all kinds of light • X rays • Radio waves • tv signals

  22. True or False:These are all kinds of light • X rays • Radio waves • tv signals • Gamma rays

  23. True or False:These are all kinds of light • X rays • Radio waves • tv signals • Gamma rays TRUE!

  24. Telescopes for every wavelength

  25. Crab Nebula at different wavelengths

  26. Milky Way at different wavelengths

  27. Why do astronomers put telescopes on remote mountains? • It’s darker

  28. Why do astronomers put telescopes on remote mountains? • It’s darker • The earth’s atmosphere is calmer

  29. Why do astronomers put telescopes on remote mountains? • It’s darker • The earth’s atmosphere is calmer • To commune with the mountain gods

  30. Why do astronomers put telescopes on remote mountains? • It’s darker • The earth’s atmosphere is calmer • To commune with the mountain gods • a & b

  31. Why do astronomers put telescopes on remote mountains? • It’s darker • The earth’s atmosphere is calmer • To commune with the mountain gods • a & b

  32. Where should you NOT buy a telescope? • Hobby store

  33. Where should you NOT buy a telescope? • Hobby store • Online

  34. Where should you NOT buy a telescope? • Hobby store • Online • Department store

  35. Where should you NOT buy a telescope? ?? • Hobby store • Online • Department store • All of the above

  36. Where should you NOT buy a telescope? • Hobby store • Online • Department store • All of the above Caveat emptor!

  37. Other Questions??

  38. Websites of interest • www.astro.umd.edu/openhouse/4observing-resources/telescope-advice.html • curious.astro.cornell.edu/telescopes.php • www.skyandtelescope.com/astronomy-equipment/types-of-telescopes/ • www.skyandtelescope.com/astronomy-equipment/how-to-choose-a-telescope/ • www.astronomy.com/observing/equipment-use/2004/07/buying-a-telescope

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