Earth, Sun and Moon

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Earth, Sun and Moon

• Trippensee Planetarium
• CSI Astronomy 101- Planetary Laboratory
• Fall 2006

AVK
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Earth's Basic Motions
Rotation, daily or diurnal motion
also Earth's tilt, obliquity, changes, as does
the shape of Earth's orbit
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View of Earths orbit with orbital plane, the
ecliptic, shown horizontal
Summer Solstice June 21
Summer Solstice
View of Earth at Summer solstice with equator and
celestial equator shown as horizontal
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Pisces
Aquarius
Aries
Capricorn
Sagittarius
September
October
August
November
Taurus
July
December
June
January
May
Scorpio
February
April
March
Gemini
Cancer
Libra
Leo
Virgo
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Pisces
Aquarius
Aries
Capricorn
Sagittarius
September
October
August
November
Taurus
July
December
June
January
May
Scorpio
February
April
March
Gemini
Cancer
Libra
Leo
Virgo
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Earth - Northern Hemisphere Summer
Sun
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At the Equinoxes
If the northern axis is pointing toward us, it is
the autumnal equinox, if away then it is the
vernal equinox.
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The Earth Revolves Around the Sun
Earth
Summer Solstice June 21
But a Geocentric Celestial Globe is a convenient
model
Ecliptic
.
Earth
Celestial Equator
The celestial globe above is set so that we are
positioned at the North Pole.
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Image Credit NASA - The Visible Earth Team