1 / 27

Notes

Notes Eclipses Solar Eclipse a. Umbra: -dark, central region of the moon’s shadow -you can see a total eclipse b. Penumbra- -fainter, outer region of the moon’s shadow -you can see a partial eclipse Other Notes:

jacob
Download Presentation

Notes

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. Notes Eclipses

  2. Solar Eclipse a. Umbra: -dark, central region of the moon’s shadow -you can see a total eclipse b. Penumbra- -fainter, outer region of the moon’s shadow -you can see a partial eclipse

  3. Other Notes: • Can happen b/c the Moon is 400x smaller than the Sun, but it is also about 400X closer to Earth • Can only happen when the moon is in “New Moon position” • You can see the corona of the sun during a total eclipse

  4. Other Notes, cont… • Only lasts a few minutes (totality) • Happens 2-3 times per year http://highered.mcgraw-hill.com/sites/0072482621/student_view0/animations.html# -Chapter 9, Eclipses animation

  5. Why don’t eclipses happen every month? • The moon’s orbit around the Earth is tilted at 5 degrees compared to the Earth’s orbit around the sun. • Therefore, the moon, Sun and Earth are not perfectly lined up every new or full moon to create an eclipse. http://observe.phy.sfasu.edu/courses/ast105/lectures105/chapter02/moon_orbit_tilt_vs_ecliptic.htm

  6. Other Notes, cont…

  7. http://www.astro.ubc.ca/~scharein/a310/SolSysEx/eclipse/Eclipse.htmlhttp://www.astro.ubc.ca/~scharein/a310/SolSysEx/eclipse/Eclipse.html http://www.fourmilab.ch/earthview/pacalc.html Apogee-The point when the moon is at its farthest from Earth each month Perigee-The point when the moon is at its closest to the Earth each month 252,700 miles 221,500 miles

  8. When can we see a solar eclipse? You are here! Next total solar eclipse that can be seen from North America = August 21st, 2017

  9. Closest Viewing of the Total Eclipse = St. Louis at noon

  10. When can we see a solar eclipse? Next total solar eclipse that can be seen near Chicago = September 14th, 2099 http://eclipse.astronomie.info/sofi/activemaps.html http://sunearth.gsfc.nasa.gov/eclipse/SEplot/SEplot2051/SE2099Sep14T.GIF

  11. When can we see a solar eclipse? You are here! Next partial solar eclipse that can be seen from North America = June 1, 2011

  12. When can we see a solar eclipse? You are here! Next annular solar eclipse that can be seen from North America = May 20th, 2012

  13. Lunar Eclipse a. Umbra: -total lunar eclipse occurs when the moon is in this darker, central region of the Earth’s shadow b. Penumbra- -partial lunar eclipse occurs when the moon is in this fainter outer region of the Earth’s shadow

  14. Other Notes • Can only happen when the moon is in “full moon position” • Can last for several hours • Happen slightly more often than solar eclipses (3-4 times per year) • The moon never fully disappears, but instead turns red in color

  15. Why is the moon red during a total lunar eclipse?

  16. When can we see a lunar eclipse? Next total lunar eclipse seen from North America =February 21, 2008

More Related