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Home , Aries (constellation), Cancer (constellation), Capricornus, Gemini (constellation), Leo (constellation), Libra (constellation)

along the -

Sun’s path • The path of the The 13 Zodiacal constellations that (______) was an our Sun covers-up (blocks) in the important part of ancient course of one year • The and Sun (used to be only 12) represented deities, and their positions were significant • • • Most ancient • • astronomers were • • also in the astrology • • business • • ______• • •

North

Aquarius Pisces Capricornus Aries 1 Sagittarius

Taurus 365 days Scorpius

Libra Gemini Virgo Cancer Leo Figure 1

The Zodiacal Constellations that our Sun covers-up (blocks) in the course of one year (only 12 are shown here)

North Star North Star W Aquarius Aquarius Pisces Capricornus Pisces Capricornus Aries Aries 1 day 1 day What time is it Sagittarius Sagittarius

Taurus Taurus 365 days Scorpius 365 days Scorpius for the

Libra Libra Gemini observer? Gemini Virgo Virgo Cancer Leo Cancer Leo Figure 1 E Figure 1 Which What is the name is the Taurus Taurus of the

Aries Sun in front of for Aries Gemini Gemini constellation that the situation South South would appear on Cancer Pisces shown? Cancer Pisces the observers W Figure 2 – What it E Figure 2 – What it Eastern Horizon? would look like if you would look like if you were the observer in were the observer in Western? Figure 1 Figure 1

1 North Star W Aquarius 12 hours later Pisces Capricornus Aries what object will Lecture-Tutorial: Seasonal 1 day Sagittarius

Taurus be at the (page 7) 365 days Scorpius

Libra position that Gemini Virgo Cancer Leo Taurus is in • Work with a partner! E Figure 1 now? • Read the instructions and questions carefully. • Discuss the concepts and your answers with one Taurus 18 hours later another. Aries Gemini where will the • Come to a consensus answer you all agree on.

South Cancer Pisces Sun be? • If you get stuck or are not sure of your answer, ask another group. W Where will E Figure 2 – What it • If you get really stuck or don’t understand what the would look like if you Scorpius be? were the observer in Lecture Tutorial is asking, ask me for help. Figure 1

How can we describe the motion of the sun The changing during the year! in the sky? meridian X Zenith or overhead

east south west

How can we describe the motion of the sun in the sky? Where is the Sun at noon today?

meridian zenith zenith

here or there? LUNCH!!

AM or ante PM or post meridian meridian

east south west east south west

2 What about the path of the Sun? Where is the Sun throughout the year?

Mar 21 21 zenith (Vernal) zenith Summer and Sept 21 What about (Autumnal) there tomorrow at noon? JUST A LITTLE LOWER !! Dec 21

east south west east south west

Position of the Sun when photographed during the day of the winter and summer solstice Altitude of the Sun Animation:

As we watch the animation, pay attention to

• Where the sun rises and sets • Altitude of the sun at mid-day

Also, watch how the shadow changes during a day and over the course of the year.

The Reason for the Seasons Reason for the Seasons Hypothesis: Seasons are caused by the moving closer to or farther from the Sun. • The seasons are caused by the tilt of the Earth’s 1. Data: When things are ______to the a light source (like the Sun) they get ______. axis • In Summer, the Sun’s rays are ______2. Data: Northern hemisphere has summer in ______, ______, and and the days are ______; Southern hemisphere has summer in ______, ______and ______• In Winter, the Sun’s rays are ______and the days are ______3. Data: Earth’s distance from the Sun hardly changes in the course of a year. (about __%) – Earth is closest to the Sun on ______The Seasons do NOT occur because the Earth gets closer or farther from the Sun Can #2 be true if our hypothesis is correct?

3 Reason #1: More or Less Intense Sunlight Reason #2: Longer or Shorter Days • A _____ beam of light shines on a smaller area than a ______beam. • So a _____ beam is more intense

______/______

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