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The Cycles of the Moon
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The Sun is also producing tidal effects, about half as strong as the Moon.

Near Full and New Moon, those two effects add up to cause spring tides

Near first and third quarter, the two effects work at a right angle w.r.t. each other, causing neap tides.

Spring tides

Neap tides

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The Tidally Locked Orbit of the Moon

The Tidally Locked Orbit of the Moon

The Earth also exerts tidal forces on the Moon’s rocky interior.

→ It is rotating with the same period around its axis as it is orbiting Earth (tidally locked).

→ We always see the same side of the moon facing Earth.

Slide 13

The Near Side of the Moon

The Near Side of the Moon

Slide 14

A total lunar eclipse …

A total lunar eclipse …

is a high-performance moon vehicle built by Mitsubishi.

occurs when the moon disappears behind the sun.

occurs when the moon becomes invisible because it is too close to the sun.

occurs when the moon moves through Earth’s shadow.

occurs when the moon disappears behind Mars.

Slide 15

Lunar Eclipses

Lunar Eclipses

The Earth’s shadow consists of a zone of full shadow, the Umbra, and a zone of partial shadow, the Penumbra.

If the Moon passes through the Umbra, we see a lunar eclipse.

If the entire surface of the Moon enters the Umbra, the lunar eclipse is total.

Slide 16

A Total Lunar Eclipse (I)

A Total Lunar Eclipse (I)

Slide 17

A Total Lunar Eclipse (II)

A Total Lunar Eclipse (II)

A total lunar eclipse can last up to 1 hour and 4 min.

During a total eclipse, the moon has a faint, red glow, reflecting sun light scattered in the Earth’s atmosphere.

Slide 18

Typically, 1 or 2 lunar eclipses per year.

Typically, 1 or 2 lunar eclipses per year.

Slide 19

Solar Eclipses

Solar Eclipses

The Sun has approx. the same angular diameter of ~ .5 as the Moon.

Thus, when the Moon passes in front of the Sun, it can cover it completely, causing a total solar eclipse.

Slide 2

Total Solar Eclipse

Total Solar Eclipse

Prominences

Chromosphere and Corona

Slide 21

Solar Eclipses

Slide 22

Diamond Ring Effect

Diamond Ring Effect

Slide 23

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