EclipsesEclipsesMost photos are from Mr.Eclipse.com Most photos are from Mr.Eclipse.com

Edited 5-7-13Edited 5-7-13

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Types of ShadowsTypes of Shadows• Penumbra: Penumbra:

– A lighter outer shadow of an eclipse.A lighter outer shadow of an eclipse.

• Umbra: Umbra: – A dark inner shadow of an eclipse.A dark inner shadow of an eclipse.

Lunar EclipsesLunar Eclipses

• Lunar Eclipses are caused when . . . Lunar Eclipses are caused when . . . – The Earth’s shadow falls on the moon.The Earth’s shadow falls on the moon.

Lunar EclipsesLunar Eclipses

• Total Lunar EclipseTotal Lunar Eclipse– The moon looks redThe moon looks red

because there is somebecause there is some

sunlight that is scattered bysunlight that is scattered by

Earth’s atmosphere makingEarth’s atmosphere making

the moon look reddish orthe moon look reddish or

orange (like a sunset)orange (like a sunset)

• Penumbral Lunar EclipsePenumbral Lunar Eclipse

Solar EclipsesSolar Eclipses

• Solar Eclipses are caused when. . . Solar Eclipses are caused when. . . – The Moon’s shadow is on the Earth.The Moon’s shadow is on the Earth.

Solar EclipsesSolar Eclipses

• Total Solar EclipseTotal Solar Eclipse– The moon perfectly The moon perfectly

blocks the surface blocks the surface of the Sun.of the Sun.

• Annular Solar Annular Solar EclipseEclipse– The moon is further The moon is further

from the Earth and from the Earth and cannot cover the cannot cover the entire Sun.entire Sun.

Regularity of EclipsesRegularity of Eclipses

• Lunar– Lunar eclipses Lunar eclipses

happen about every 6 happen about every 6 months.months.

• SolarSolar– Solar eclipses happen Solar eclipses happen

about every 6 about every 6 months.months.

– There are about 14 There are about 14 days between a solar days between a solar and lunar eclipse.and lunar eclipse.

Total Solar Eclipse August Total Solar Eclipse August 20172017

Upcoming Solar EclipsesUpcoming Solar Eclipses

May 10, 2013 – Annular May 10, 2013 – Annular EclipseEclipse

http://www.timeanddate.com/eclipse/solar/2013-may-10

Upcoming Lunar EclipsesUpcoming Lunar Eclipses

Solar Eclipse from the Moon’s Solar Eclipse from the Moon’s Perspective.Perspective.• Al Bean took this Al Bean took this

picture from Apollo picture from Apollo 12.12.