3/27 Warm up What is an eclipse?

Eclipses Miss. Haase

What is an Eclipse? This is when the Moon, Sun and the Earth are directly in line. There are two types of Eclipses Lunar Solar

Lunar Eclipse When the Earth passes between the Sun and the Moon. The Moon is darkened because of Earth’s shadow Moon must be in the full Moon phase Must completely enter the umbral shadow

Umbra and Penumbra Shadow Shadows have two parts because of the nature of how light curves Umbra = dark shadow Penumbra = light shadow Only observers in the Umbra are able to view a total eclipse

Why Does the Moon look Red? Even though the moon is in Earth’s shadow it still receives some sunlight That light is refracted around Earth by our atmosphere Clouds, dust and pollution affect the color and brightness of the Moons appearance.

Solar Eclipse When the Moon passes between the Earth and the Sun

How to properly view a solar eclipse

Partial and Total Eclipses Conditions for total eclipse Moon must be full Moon must completely enter the umbra Total Solar Eclipse When the moon is closest to Earth Look bigger than the Sun and blocks it out Partial eclipse When the Moon is not quite close enough to block out the entire sun

Annular Eclipse When the moon is farther from the Earth Looks smaller than the Sun Blocks out all of the Sun’s bright disk except the outer ring of sunlight

Cool Facts! Aristotle proved the Earth is spherical from observing a lunar eclipse From the shadow of the Earth on the moon The maximum number of solar ad lunar eclipses that occur in one year is 7 Eclipses last up to 7 minutes and 31 seconds Most are much shorter than this.

Upcoming Solar and Lunar Eclipses Total Solar Eclipse: August 21, 2017 Total Lunar Eclipse: January 31, 2018 https://www.timeanddate.com/eclipse/list.html?start y=2010

Exit Ticket  What phase must the Moon be in for a lunar eclipse to occur? Answer: Full moon phase

Phases of the Moon

3-30 Warm up Waning Crescent What is the name of this phase of the moon? Waning Crescent

Lunar Phases How many phases does the moon go through? 8 different phases Starting with New Moon 29 ½ days for the moon to orbit the Earth New Moon, Waxing crescent, 1st Quarter, Waxing Gibbous, Full moon, Waning Gibbous, 3rd quarter, Waning crescent

New Moon The “first” phases of the moon The moon appears dark Side of the moon that is lit by the sun is not facing Earth

Waxing Crescent The surface of the moon is becoming more illuminated by the sun. Waxing = growing illumination

First Quarter Moon The first half of the moon is visible. The moon is a quarter of the way around the Earth in its orbit.

Waxing Gibbous More than half is illuminated but not yet fully illuminated. Rugby ball shaped

Full Moon Entire surface of the Moon is illuminated. Side of the Moon facing Earth is fully illuminated by the sun.

Waning Gibbous Illuminated surface become smaller. More than half is still illuminated but less than full Illumination begins to decrease from the right side\

3rd Quarter The second half of the moon is illuminated

Waning Crescent Right before the new moon phase we only see a sliver of the illuminated surface

What phase of the moon is tonight? http://www.moongiant.com/phase/today/

Exit Ticket  How long does it take the Moon to orbit the Earth?