Solar & Lunar Eclipses

Solar & Lunar Eclipses

Solar & Lunar Eclipses Are the Sun & Moon the same size? Are the Sun & Moon the same size?

The sun is 400x larger (diameter) than the moon The moon is 400x closer to Earth than the sun This ratio is what enables total solar eclipses

Shadows & Light Umbral shadow Darkest part Penumbral shadow Lighter part Total Solar Eclipses

About 2-4 per year on average Rare to see Can occur during a New Moon phase Only the outermost part of the Sun (Corona) is visible at totality Umbral shadow

8/21/17 Total eclipse over North America (Oregon to Georgia) Total Solar Eclipse Partial Solar Eclipses

35% of all solar eclipses are partial More prevalent due to less reliance on Sun/Moon size & distance ratio Can occur during a New Moon phase Varying amounts of Sun will be seen

Penumbral shadow Partial Solar Eclipse Total Lunar Eclipses

Can occur during a Full Moon phase Moon passes through Earths umbral shadow Partial eclipses will be seen on either side of totality Everyone on the night side of Earth can see Lunar

eclipses Partial Lunar Eclipses Can occur during Full Moon phase Moon passes through Earths penumbral

shadow Everyone on the night side of Earth can see Lunar eclipses Draw the Solar eclipse

Draw the Lunar eclipse Why dont eclipses happen every month? Moon is on a 50 inclined plane (tilted orbit)

compared to Earth Shadows of Moon & Earth typically miss each other Only perfect or near perfect alignments create the eclipses

Moon orbit around Earth

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