Eclipse & lunar phases final

Eclipse: 

Eclipse Nature is an infinite sphere whose center is everywhere and whose circumference is nowhere. -- Blaise Pascal A penny will hide the biggest star in the universe if you hold it close enough to your eye. -- Samuel Grafton

Solar Eclipses: 

Solar Eclipses The Sun is vanishing! The Sun is going out! The daylight is retreating!

A view from the past.: 

A view from the past. “Zeus, the father of the Olympic Gods, turned mid-day into night, hiding the light of the dazzling Sun; and sore fear came upon men.” Archilochus (c680-c640 BC)

The Modern View: 

The Modern View The answer lies hidden among the shadows. Earth Moon

Shadow Structure: 

Shadow Structure Penumbra Penumbra Umbra

Eclipses: 

Eclipses The Sun and Moon occasionally line up so that we have an eclipse. These eclipses happen every year To see a solar eclipse, you need to be on a particular part of the Earth

Solar Eclipse Details: 

South Pole North Pole Solar Eclipse Details Sun Moon What is the phase of the moon? New Moon!

PowerPoint Presentation: 

The Moon The Moon shines by reflected sunlight. On average, it reflects about 7% of the incident sunlight. The Moon appears about 400,000 times fainter than the Sun in the sky. The phases of the Moon are the result of varying viewing angles throughout the month. A common misconception is that the phases of the Moon are caused by the shadow of the Earth.

Orbit of the Moon: 

Orbit of the Moon

Solar Eclipse Images: 

Solar Eclipse Images

Solar Eclipses: 

Solar Eclipses When the Moon’s shadow covers part of the Earth Only happens at New Moon Three types: Annular, Partial, and Total

Total Solar Eclipse: 

Total Solar Eclipse Observers in the “umbra” shadow see a total eclipse (safe to view the Sun); can see the corona Those in “penumbra” see a partial eclipse—not safe to look directly at Sun Only lasts a few minutes Path of Totality about 10,000 miles long, only 100 miles wide

Photo of a Total Eclipse: 

Photo of a Total Eclipse http://sunearthday.nasa.gov/2006/multimedia/gal_008.php

Annular Solar Eclipse: 

Annular Solar Eclipse When the Moon is too far to completely cover the Sun—the umbra doesn’t reach the Earth Sun appears as a donut around the Moon

Photos of an Annular Eclipse: 

Photos of an Annular Eclipse http://sunearthday.nasa.gov/2006/multimedia/gal_010.php; photos taken by Fred Espenak

Total Solar Eclipse: 

Total Solar Eclipse

PowerPoint Presentation: 

A Total Solar Eclipse from beginning to end

Interesting Features: 

Interesting Features

The Diamond Ring: 

The Diamond Ring

Why not a solar eclipse every month then? : 

Why not a solar eclipse every month then? Sun Ecliptic Moon Moon’s Orbit Earth 5 o Moon's orbit is tilted about 5 o with respect to the Earth's orbit (ecliptic), so the shadows usually miss!

PowerPoint Presentation: 

· But, the Moon passes through the ecliptic twice a month. · *IF* at new moon - SOLAR ECLIPSE probability.

Annular Solar Eclipse: 

Annular Solar Eclipse

Partial Solar Eclipse: 

Partial Solar Eclipse During a total solar eclipse, depending on your location during the event, you might only see part of the Sun’s face blocked because of your observing vantage point.

A Lunar Eclipse : 

A Lunar Eclipse Moon Sun Earth Moon’s Path A lunar eclipse occurs when the Earth lies between the Sun and Moon, so that Earth's shadow darkens the Moon.

PowerPoint Presentation: 

This image shows a complete transition during a lunar eclipse. Notice that the phase of the moon is “full.”

PowerPoint Presentation: 

The moon becomes a blood red color during a total lunar eclipse. No wonder that ancient cultures feared the appearance of the moon during a lunar eclipse.

Lunar Eclipse Types: 

Lunar Eclipse Types Total Penumbral Eclipse Total Lunar Eclipse Partial Lunar Eclipse Partial Penumbral Eclipse

The Blood Moon: 

Earth’s Atmosphere Sunlight Moon Earth The Blood Moon The moon often does not totally disappear during a total lunar eclipse. Instead it can be seen as a very dark red color because of the refraction of sunlight through the Earth's atmosphere.