Bell workBell work

What do you think is happening in What do you think is happening in space when solar eclipses happen?space when solar eclipses happen?

EclipsesEclipsesSolar Eclipses

Objectives for todayObjectives for today

0607.6.70607.6.7 Describe the causes of lunar Describe the causes of lunar and solar eclipses.and solar eclipses.

SPI 0607.6.7 SPI 0607.6.7 I can explain the difference I can explain the difference between a solar and a lunar eclipse. between a solar and a lunar eclipse.

What is an eclipse?What is an eclipse?The Sun, Earth, and Moon occasionally The Sun, Earth, and Moon occasionally line up so that we have an eclipse. line up so that we have an eclipse. – These eclipses happen every yearThese eclipses happen every year– There are two types of eclipsesThere are two types of eclipses

SolarSolar

LunarLunar

– To see a solar eclipse, you need to be on a To see a solar eclipse, you need to be on a particular part of the Earthparticular part of the Earth

– To see a Lunar eclipse, you need to be on the To see a Lunar eclipse, you need to be on the night side of the Earthnight side of the Earth

What is an eclipse?What is an eclipse?Celestial bodies are always “eclipsing” or Celestial bodies are always “eclipsing” or moving in front of each other. moving in front of each other.

Eclipses occur at predictable intervals.Eclipses occur at predictable intervals.

Other names include: Transits and Other names include: Transits and Occultations.Occultations.

What is a solar eclipse?What is a solar eclipse?

A solar eclipse is A solar eclipse is when the moon when the moon covers up the sun!covers up the sun!

This occurs during the This occurs during the day time.day time.

The moon moves in The moon moves in front of the sun.front of the sun.

Solar EclipsesSolar EclipsesWhen the Moon’s shadow covers part of the EarthWhen the Moon’s shadow covers part of the Earth

Only happens at New MoonOnly happens at New Moon

Three types: Annular, Partial, and TotalThree types: Annular, Partial, and Total

Objectives for todayObjectives for today

0607.6.70607.6.7 Describe the causes of lunar Describe the causes of lunar and solar eclipses.and solar eclipses.

SPI 0607.6.7 SPI 0607.6.7 I can explain the difference I can explain the difference between a solar and a lunar eclipse. between a solar and a lunar eclipse.

Total Eclipse of the Sun

Total Solar EclipseTotal Solar EclipseObservers in the “umbra” shadow see a total eclipse (safe to view the Sun); Observers in the “umbra” shadow see a total eclipse (safe to view the Sun); can see the coronacan see the coronaThose in “penumbra” see a partial eclipse—not safe to look directly at SunThose in “penumbra” see a partial eclipse—not safe to look directly at SunOnly lasts a few minutesOnly lasts a few minutesPath of Totality about 10,000 miles long, only 100 miles widePath of Totality about 10,000 miles long, only 100 miles wide

Annular Solar EclipseAnnular Solar EclipseWhen the Moon is too far to completely cover the Sun—the When the Moon is too far to completely cover the Sun—the umbra doesn’t reach the Earthumbra doesn’t reach the Earth

Sun appears as a donut around the MoonSun appears as a donut around the Moon

Photos of an Annular EclipsePhotos of an Annular Eclipse

http://sunearthday.nasa.gov/2006/multimedia/gal_010.php; photos taken by Fred Espenak

Annular Eclipse of the SunAnnular Eclipse of the Sun

Total Solar eclipseAnnular eclipse

Objectives for todayObjectives for today

0607.6.70607.6.7 Describe the causes of lunar Describe the causes of lunar and solar eclipses.and solar eclipses.

SPI 0607.6.7 SPI 0607.6.7 I can explain the difference I can explain the difference between a solar and a lunar eclipse. between a solar and a lunar eclipse.