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Radio Astronomy

Pascale Valles Embry-Riddle Aeronautical University Research Experience for Teachers. Radio Astronomy. (Encyclopedia of Science). Radio Astronomy. The study of the invisible universe Radio Waves Radio Telescope. (MIT Haystack). Electromagnetic Spectru m. Visible Light Radio waves.

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Radio Astronomy

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  1. Pascale Valles Embry-Riddle Aeronautical University Research Experience for Teachers Radio Astronomy (Encyclopedia of Science)

  2. Radio Astronomy • The study of the invisible universe • Radio Waves • Radio Telescope (MIT Haystack)

  3. Electromagnetic Spectrum • Visible Light • Radio waves (Wikipedia)

  4. Observations • Cosmic Microwave Background Radiation • Probe the “Dark Ages” • Earliest generation of galaxies • Analyze and explore the black holes • Pulsar • Seti • Unnatural signals

  5. Observations • Dust-shrouded environments • Birth of stars and planets • Center of the Milky Way • Trace hydrogen gas • location, density, and motion • ¾ of ordinary matter

  6. Atomic Hydrgen (Science Photo Library)

  7. How Radio Telescopes Work • Two basic components: • Large radio antenna • a sensitive radiometer or radio receiver (National Radio Astronomy Observatory)

  8. (University of Oregon)

  9. Using the SRT • Software controller • JAVA computer language • Start up the program • Simulation vs. Normal mode • Coordinate points • Azimuth (x-axis) • Elevation (y-axis)

  10. How to use the SRT (MIT Haystack)

  11. Moving the telescope • Click on pre-set object • Click “track” • Telescope movement • Yellow  Red (Museum of Arts and Sciences Daytona)

  12. Moving the Telescope • Click “azel” button • top of the screen • Click in the text field • bottom left of the screen • Azimuth, Space, Elevation, Enter • Telescope movement

  13. Frequency Plot • Click “freq” button • top of the screen • 1420.4 Hz • Frequency vs. temperature (intensity) plot • Upper right   • Automatic Updates

  14. Doppler Shift Change in frequency of a wave for an observer moving relative to the source of the wave. (Wikipedia)

  15. Doppler Shift (Physics Classroom)

  16. Doppler Shift (Physics Classroom)

  17. Doppler Shift • 1420.4 MHz peak • Shifts • Motion of hydrogen • Towards • Away • Measure frequency shift • Determine relative speed of hydrogen • Rotation velocity is determined

  18. Temperature • Radiation • Radio waves • Hotter=more radio waves • Assign temperature

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