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

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

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