Unit III: The Earth in Space. Celestial Objects Celestial Sphere.

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Presentation transcript:

Unit III: The Earth in Space

Celestial Objects

Celestial Sphere

How do celestial objects move in the sky? Apparent Daily Motion: Apparent Daily Motion:

Why is it called “apparent motion”? Tractor Trailer Effect

Constellations: Constellations: Examples- Examples-

Models of the Night Sky Geocentric Model:

Heliocentric Model:

The Heliocentric Model Takes Two Earth Motions Into Account 1. 1.

2. 2.

Period of Revolution:

How do we know that Earth really rotates on its axis? Foucault Pendulum:

Coriolis Effect:

How do we know that Earth revolves around the sun?

Apparent Motions of the Sun ***

Apparent Solar Day:

Solar Noon: **

Shadows….

morning / evening afternoon

This shows up all the time!

Which direction do the Sun and stars appear to move? Eastern Sky

Western Sky

Seasons What causes seasons on Earth? 1. 1.

2. Parallelism of the Axis:

****

Tropic of Cancer: Tropic of Cancer:

Tropic of Capricorn: Tropic of Capricorn:

****

Four Important Days in Earth Science: Summer Solstice:

Summer Solstice

2. 2. Autumnal Equinox

Autumnal Equinox

3.Winter Solstice:

Winter Solstice

4. 4.Vernal Equinox:

Vernal Equinox

WinterSpringSummerFall Date of First Day Scientific Name Direct Rays of the Sun Hit What is Happening Inside the Arctic Circle? What is Happening Inside the Antarctic Circle? How much daylight do we get on First Day in NYS? How many degrees is the Earth Tilted? Altitude of noon sun in NYS

Seasons Review

**Remember** **The Sun ONLY gets 90° (directly overhead in the tropics (23 ½º N and 23 ½º S)**