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Solar eclipse

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Transcript

  • 1. 22 July 2009 Hong Kong
  • 2. Solar Eclipse
    • http://www.youtube.com/watch?v=bZflZtRM2m4&feature=related
  • 3. Solar Eclipse
    • When the
    • Sun is
    • blocked
    • by the Moon
    • (moon is
    • between
    • the Sun and
    • the Earth)
  • 4. Solar Eclipse
  • 5. Solar Eclipse
    • Investigate the three types of Solar Eclipse
    • Total Solar Eclipse
    • Partial Solar Eclipse
    • Annular Solar Eclipse
    • Follow the instructions given in Class Activity Worksheet Part AB
  • 6. Solar Eclipse
    • Investigate the three types of Solar Eclipse
    • Did you create a Total Solar Eclipse like this?
  • 7. Solar Eclipse
    • Investigate the three types of Solar Eclipse
    • Did you see a Partial Solar Eclipse like this?
  • 8. Solar Eclipse
    • Investigate the three types of Solar Eclipse
    • Can you see an Annular Solar Eclipse like this?
  • 9. Solar Eclipse
    • Total Eclipse
  • 10. Solar Eclipse
    • Total Eclipse
  • 11. Solar Eclipse
    • Partial Eclipse
  • 12. Solar Eclipse
    • Partial Eclipse
  • 13. Solar Eclipse
    • Partial Eclipse
  • 14. Solar Eclipse
    • Annular Eclipse
  • 15. Solar Eclipse
    • Annular Eclipse – WHY?
    • Sometimes, the Moon is too small to cover the entire Sun's disk. The Moon's orbit around Earth is not perfectly round but is oval or elliptical in shape.
  • 16. Solar Eclipse
    • When the Moon is on the near side of its orbit, the Moon appears larger than the Sun. If an eclipse occurs at that time, it will be a total eclipse.
    • If an eclipse occurs while the Moon is on the far side of its orbit, the Moon appears smaller than the Sun and can't completely cover it.
  • 17. Solar Eclipse
    • How long can a Solar Eclipse last?
    • Total/Annular Solar Eclipse – A few Minutes
    • Partial Solar Eclipse/Whole process of a Solar Eclipse – Can last for a few hours
  • 18. Solar Eclipse
    • WARNING !!!!!!!
    • Never look at a Solar Eclipse directly with your naked eyes!
  • 19. Solar Eclipse
    • Annular Solar Eclipse Clip:
    • http://www.youtube.com/watch?v=GYcs2Z3_LY0
    • Partial Solar Eclipse Clip:
    • http://www.youtube.com/watch?v=JdyBIza-NS8
  • 20. Solar Eclipse
    • How many Solar Eclipse in a year?
    • - At least two, and up to five, Solar Eclipses occur each year; no more than two can be total eclipses
    • http://en.wikipedia.org/wiki/Solar_eclipse
    • Upcoming Eclipses
    • - 11 July 2010
    • http://eclipse.gsfc.nasa.gov/OH/OH2010.html
    • Observable in Hong Kong 21 May 2012
    • http://www.weather.gov.hk/gts/event/event-solar-eclps14_e.htm
    • http://www.weather.gov.hk/gts/event/event-solar-eclps1_e.htm
  • 21. Solar Eclipse
    • The End