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Radio telescopes power point
 

Radio telescopes power point

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  • The signals are analyzed and classified to determine the nature of the source. This gives us more knowledge of astronomy. They are a tool used in understanding the universe.
  • Radio telescopes can do many things. These are the main functions of them.
  • Usually many telescopes are arranged to get a better resolution.
  • The dish can be made out of metal or wire mesh. The antenna is above the dish. The signal is sent to the amplifier and into the computer.
  • The dish must be parabolic shaped to reflect the signal to the antenna. Mesh Is a good reflector material for the dish.
  • The dish must be parabolic shaped. The dish reflects radio waves to an antenna that is above the dish. The signal is sent to the amplifier for a stronger signal and to the computer for an image.
  • In order to collect the needed amount of photons the radio telescope needs to be bigger. The bigger the dish the better the picture.
  • Karl Jansky he was an engineer and worked for Bell Telephones. The telescope was mounted on four model t tires so it could be rotated. The size of the telescope was about 100 ft in diameter.
  • The two main kinds of designs that are different from the rest are Haystack and Westford telescopes.
  • Located in Wexford, Massachusetts
  • NASA uses this a lot as a test and to show.
  • It is operated by Cornell University. Has filmed many notable motion pictures.
  • This is not very often used but scientist are very interested in listening to radio telescopes.
  • These are things that would not have been discovered if it were not for the radio telescope.

Radio telescopes power point Radio telescopes power point Presentation Transcript

  • Radio Telescopes Greg Arabia TED 111 Dr. Kallis
  • What do radio telescopes do?
    • Track and collect data from satellites
    • Monitor radio signals from outer space
    • Detect weather, other planets, stars, and other astronomical objects
  • What can a small radio telescope do?
    • Detect stronger radio sources
    • Look for high energy pulses
    • Detect meteors
    • Mapping
  • What is a radio telescope?
    • Very sensitive radio receiver
    • Measures the intensity of radio waves
    • Shoots a small beam to detect the signals
    • Image source (http://dvice.com/pics/VLA_telescope.jpg)
  • How are they made?
    • A parabolic shaped dish
    • An antenna mounted on top of the dish
    • An amplifier is used gain a stronger signal
    • All the information is sent to a computer
  • Basic radio telescope
    • The dish reflects radio waves to the antenna
    • The antenna sends the signal to the amplifier
    • The information is recorded onto a computer
  • How do they work?
    • Uses a parabolic shaped dish that reflects radio waves to an antenna
    • The signal is sent to an amplifier to magnify the signal
    • The signal is processed by a computer to turn the signal into a picture
  • Radio telescopes vs. Optical telescopes
    • Radio telescopes are much larger due to wavelength size
    • Radio telescopes use lower energy than optical telescopes
    • Both use parabolic shaped dishes
  • The first radio telescope
    • Built by Karl Jansky
    • Made on accident in 1931
    • He recorded thunderstorms and categorized them in different categories
    Image source (http://www.nrao.edu/jansky/jansky4_small.jpg)
  • Types of radio telescopes
    • There are many different sizes and designs of radio telescopes
    • A few different kinds are
      • Haystack radio telescope
      • Westford radio telescope
      • Arecibo radio telescope
  • Haystack radio telescope
    • Controlled by remote
    • Used mainly for education and space tracking
    • Usually smaller telescopes
    Image source (http://www.haystack.mit.edu/edu/undergrad/srt/antenna/srtdecember.jpg)
  • Westford radio telescope
    • Dome shaped telescope
    • Made in 1961
    • Used in communications technology
    Image source: http://www.haystack.mit.edu/obs/westford/pics/Westfordatnight.gif
  • The biggest radio telescope
    • Located in Arecibo, Puerto Rico
    • 1,001 foot dish
    • Has a remote antenna
    Image source: http://aboutfacts.net/Astronomy/Astronomy6/arecibo_naic_big.jpg
  • What does a radio telescope listen to?
    • If listened to a radio telescope all you would hear is static
    • Scientist listen for man made signals
  • Discoveries
    • Discovered that the sun and the center of the Milky way galaxy have strong radio waves
    • There are strong radio waves coming from black places in the galaxy
    • They helped discover the black places were exploded stars
  • Work Cited
    • Strobel, N. (2007, June 1). Radio telescopes . Retrieved from http://www.astronomynotes.com/telescop/s4.htm
    • (Slides 2, 3, 4, 5, 6, 7, and picture on slide 6)
    • How Radio telescopes work . (n.d.). Retrieved from http://www.nrao.edu/index.php/learn/radioastronomy/radiotelescopes
    • (slides 10, 11, 12, and picture on slide 2)
    • Schloerb, A. (n.d.). The Radio telescope . Retrieved from http://www.astro.umass.edu/~fcrao/education/report1.html
    • (slides 8, 9, 13)
    • Frequently asked questions about radio astronomy . (n.d.). Retrieved from http://www.radiosky.com/faq.html
    • (slide 14, 15)