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Lecture 2 Astronomy Today

Lecture 2 Astronomy Today. 1 nanosecond = 1 ft. (1/1,000,000,000 second ). Light Speed = 299,792,458 meters/second. Using Light to Measure Distance. Earth to Moon = 1.28 light seconds. Light Speed = 299,792,458 meters/second. Using Light to Measure Distance.

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Lecture 2 Astronomy Today

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  1. Lecture 2 Astronomy Today

  2. 1 nanosecond = 1 ft (1/1,000,000,000 second) Light Speed = 299,792,458 meters/second Using Light to Measure Distance

  3. Earth to Moon = 1.28 light seconds Light Speed = 299,792,458 meters/second Using Light to Measure Distance

  4. Sun to Earth = 8.33 light minutes Light Speed = 299,792,458 meters/second Using Light to Measure Distance 1 AU (Astronomical Unit) =8.33 light minutes

  5. Sun to nearest star = 4.23 light years Light Speed = 299,792,458 meters/second Using Light to Measure Distance

  6. 1 AU 1 arc second = 1/3600 degree 1 pc Astronomers and Cosmologists use Parsecs A More Professional Unit of Distance 1 pc = 3.26 ly 1 parsec (pc)

  7. Survey of Astronomy The Milky Way Eagle Nebula North America Nebula Flaming Star Nebula

  8. The Milky Way as seen by Radio telescopes The Milky Way as mapped by all types of telescopes

  9. The Entire Milky Way Galaxy

  10. Large Magellanic Cloud 160,000 ly Andromeda (M31) 2.5 ly Small Magellanic Cloud 200,000 ly Galaxies in the Neighborhood of the Milky Way Galaxy

  11. Clusters of Galaxies Virgo Cluster - 53,000,000 ly

  12. Galaxies Deep in the Universe 10,000,000,000 ly

  13. Distribution of Galaxies Davison E. Soper, Institute of Theoretical Science, University of Oregon, Eugene OR

  14. Schematic diagram showing the position of a typical galaxy within the cosmic web The Cosmic Web R. A. Ibata et al., Science 319, 50 -52 (2008) Published by AAAS

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