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POD Draw the image of Patrick through the lens below using a ray diagram. F F Targets Explain how a refracting telescope works. What are the key parts? Draw a sketch. Telescope Lab. Telescope Targets Describe the different types of telescopes. Explain how telescopes work.

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Presentation Transcript
slide2
POD
  • Draw the image of Patrick through the lens below using a ray diagram.

F

F

targets
Targets
  • Explain how a refracting telescope works.
    • What are the key parts? Draw a sketch.
telescope targets
Telescope Targets
  • Describe the different types of telescopes.
  • Explain how telescopes work.
  • Describe how the electromagnetic spectrum is organized.
what tools are used to explore space
What Tools are used to explore Space?
  • Human Eye
  • Telescopes
  • Satellites
  • Probes
slide8
What do Telescopes “see”?

The Electromagnetic Spectrum

what do telescopes do
What do Telescopes do?
  • 1.) Collect far more light than the unaided eye.
  • 2.) Magnify the image.
  • Example: use a magnifying glass to look at the image from the “spaceship” reflector.
slide10
Optical Telescopes:
  • Most used telescope today
  • Best locations are on mountain peaks in dry climates
  • Use lenses or mirrors to gather and focus starlight
  • Usually kept in buildings with domed roofs to protect it from weather and temperature changes.
slide11
Telescope
  • Has two lenses, an Objective Lens and the eyepiece.
    • Objective Lens - Gathers light and bends the rays of light to form an image in the eyepiece
      • (Objective/Object - closest to the object)
    • Eyepiece - Magnifies the object.
  • Large Refracting Telescopes are not being built today because telescopes with mirrors are cheaper and easier to build.
slide12
Telescope
  • Uses two mirrors and one lens (the eyepiece).
  • Primary Mirror - A large curved mirror to gather and focus light. The light is then reflected to the Secondary Mirror.
  • Secondary Mirror – Reflects the image to the observer.
  • Eyepiece – magnifies the image.
slide13
Multiple Mirror Telescope
  • Several mirrors take the place of a single, large mirror
  • less expensive than most other types of telescopes
radio telescope
Radio Telescope
  • Radio telescopes, or antennas, collect faint radio waves from natural celestial objects (e.g. planets, stars and other galaxies).
  • The data is collected and then analyzed using powerful computers and software designed specifically for this purpose.

From: National Radio Astronomy Observatory, http://www.nrao.edu/

slide15
Green Bank Telescope (GBT), located in West Virginia, is the world's largest fully steerable radio telescope. (140-ft Telescope in background)
slide16
The Very Large Array (VLA) in Socorro, New Mexico consists of 27 antennas, each measuring 25 meters in diameter and weighing approximately 200 tons
spitzer infra red telescope
Spitzer Infra-red Telescope

The Spitzer Space Telescope was launched into space on 25 August 2003.

  • 2.5-year mission.
  • Spitzer obtains images and spectra by detecting the infrared energy, or heat, radiated by objects in space between wavelengths of 3 and 180 microns (1 micron is one-millionth of a meter).

http://www.spitzer.caltech.edu/about/index.shtml

slide20
Double Helix Nebula
  • The double helix nebula. The spots are infrared-luminous stars, mostly red giants and red supergiants. Many other stars are present in this region, but are too dim to appear even in this sensitive infrared image.
hubble space telescope
Hubble Space Telescope
  • Observes the Universe at ultraviolet, visual, and near-infrared wavelengths.
  • The Hubble telescope was deployed by a NASA Space Shuttle in 1990. Subsequent Shuttle missions have repaired and added additional capabilities to HST.

http://www.nasa.gov/mission_pages/hubble/main/index.html

hubble space telescope25
Hubble Space Telescope
  • Hubble optics
  • Images…
chandra x ray observatory
Chandra X-Ray Observatory
  • The Chandra X-ray Observatory, which was launched by Space Shuttle Columbia in 1999, can better define the hot, turbulent regions of space. This increased clarity can help scientists answer fundamental questions about the origin, evolution, and destiny of the universe

From: http://www.nasa.gov/mission_pages/chandra/main/index.html

chandra x ray observatory28
Chandra X-Ray Observatory
  • X-rays are produced in the cosmos when matter is heated to millions of degrees. Such temperatures occur where high magnetic fields, or extreme gravity, or explosive forces, occur.
  • Images
  • More….
summary
Summary
  • NASA's Great Observatories
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