1 / 17

Astronomy is a nocturnal activity

Astronomy is a nocturnal activity. 1953, T. E. Houck and A. D. Code. The sky above us. Stars dominate the night sky. Relative positions of stars remains fixed The whole pattern revolves around us Constellations – patterns in star distribution Constellations vary – related to mythology

lara-mays
Download Presentation

Astronomy is a nocturnal activity

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Astronomy is a nocturnal activity 1953, T. E. Houck and A. D. Code

  2. The sky above us

  3. Stars dominate the night sky • Relative positions of stars remains fixed • The whole pattern revolves around us • Constellations – patterns in star distribution • Constellations vary – related to mythology • Constellations not real • 1929 IUA – 88 official constellations • Every star belongs to a constellation

  4. Orion Constellation

  5. Map of Orion Constellation

  6. The wanderers • Sun, Moon, planets move relative to stars • Wander in a narrow band – Zodiac • Ecliptic

  7. The Zodiac

  8. The Ecliptic

  9. The Celestial Sphere 23.5

  10. Earth’s prograde rotation

  11. Ursa Minor

  12. Precession of Earth’s spin 26,000 years period

  13. Equatorial Coordinates

  14. Examples • Orion: • Right Ascension: 5 hours • Declination: 5 degrees • Ursa Major = Saptarshi Mandal • The Great Bear (Big Dipper) • Right Ascension: 11 hours • Declination: 50 degrees

  15. Image Sources

  16. Image Sources http://fourmilab.ch/yoursky/

  17. Image Sources

More Related