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Explore the fascinating phenomena of the moon's rotation, eclipses, and tides. Learn about the lunar and solar eclipses, the phases of the moon, and the gravitational forces that cause tides. Discover how these events shape our understanding of the celestial world.
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Agenda • Does the moon rotate? • Eclipses • Tides
Mid-term check inOn a notecard… • What is helping you learn the most in this class? • What is helping you learn the least? • What one thing would you change about this class?
The same side of the moon always faces us. Therefore • The moon does not rotate on its axis • The moon does rotate on its axis
If you lived here… How often would the Sun rise? How often would the Earth rise? How often would you see stars?
If you lived here… • How long would a day last? • How long would a night last?
Types of solar eclipses NASA Total solar eclipse
Types of solar eclipses NASA Annular eclipse
Size and distance to scale! Moon Earth Actual tilt of the Moon’s orbit line to the Sun
To moon The moon’s gravity distorts the oceans. Tides occur twice a day!
What about the Sun? Spring tide Sun, moon in a line Neap tide Sun, moon at right angles
New or full ¼ or ¾ Waxing Waning Can be any phase What is the phase of the moon on this day? Spring tide Sun, moon in a line
Of course, the Earth is not all water • Land masses stop water flow • Friction between oceans and floor • Depth of ocean varies • The Earth rotates
Summary • Lunar eclipses: Sun-Earth-Moon • Solar eclipses: Sun-Moon-Earth • Phases of the moon • From above the solar system, looking south
What is a haiku? • 3 line poem: • Line 1 – 5 syllables • Line 2 – 7 syllables • Line 3 – 5 syllables • Does not have to rhyme
On a note cardwrite 3 haikus Eclipses Tides Gravity 5 7 5
The moon is overhead at 3 am It rose around 9 pm It will set around 9 am Example: how does this look from above the solar system?
E W It’s 3 a.m. The moon is overhead
E W Rose at 9 pm
It rose around 9 pm How does this look outside?
Example What time is it? How does the moon look?
It will set around 9 am How does this look outside?
More on tides… • Largest tidal range: 50 ft (East coast of Canada) • Typical range: 5-10 ft • Moon’s tidal strength is about 2 times that of the Sun • These forces actually cause the Earth and Moon to change shape!