The Moon Tides and Eclipses Tides What is

The Moon, Tides, and Eclipses

Tides

What is a tide? o The rise and fall of the sea level. o Caused by the gravitational pull of the Sun and the Moon. o There are 2 high tides and 2 low tides daily.

Affect of Gravity on tideso The moon’s gravity exerts a strong pull on the Earth causes the water to bulge outward at places. o The bulges of water are high tides & non-bulges are low tides.

Spring Tideso When there is the greatest difference between high and low tides (highs and low-lows). o Occurs when moon is in a straight line with sun and Earth= New moon and Full moon.

Neap Tideso When there is the little difference between high and low tides (almost equal). o Occurs when moon is at 90° with sun and Earth= 1 st and 3 rd quarter.

What is an Eclipse? When Earth or the Moon temporarily blocks the sunlight from reaching the other.

Two Types of Eclipses 1. Solar Eclipse- Moon comes between Sun and Earth and casts a shadow on Earth. 2. Lunar Eclipse- Earth comes between the Sun’s light and the moon and blocks the light from the moon.

Shadows of Eclipses 1. Umbra- Darkest part of a shadow. 2. Penumbra- lighter portion of a shadow.

Solar Eclipse A solar eclipse can only occur when the moon is in its “new moon” phase.

Total and Partial Solar Eclipses

Total Solar Eclipse o Total- an eclipse as seen from a particular area of the earth's surface where the eclipsed body is completely hidden

Bailey’s Beads o The Baily's beads effect is a feature of total solar eclipses. As the moon "grazes" by the Sun during a solar eclipse, the rugged lunar limb topography allows beads of sunlight to shine through in some places, and not in others

Bailey’s Beads

Diamond Ring o The diamond ring effect is seen when only one bead is left; a shining diamond set in a bright ring around the lunar silhouette.

Annular Eclipse o Annular- an eclipse of the sun in which the moon does not cover the entire disc of the sun, so that a ring of sunlight surrounds the shadow of the moon

Solar Eclipse o Partial-An eclipse in which the part of the surface of a celestial object is obscured n o August 21 st 2017 Next date- in Texas n n October 14 th 2023 -Annular April 8 th 2024 -Total

Know 1 st, 2 nd, 3 rd and 4 th contact

Lunar Eclipse A lunar eclipse can only occur when the moon is in its “full moon” phase.

Total Lunar Eclipse o o Lunar eclipses occur because of the moon’s tilted orbit and only occur a couple times in a year Jan. 31 st 2018

o o o http: //www. space. com/18480 -solar-eclipsemoment-of-totality-video. html https: //www. youtube. com/watch? v=BXGWC X 3 Duxs http: //www. space. com/22685 -mars-solareclipse-curiosity-rover-videos. html