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Eclipses. Data First Model Later. Annular Eclipse of the Sun. Total Eclipse of the Sun. Total Eclipse of the Sun. Total Eclipse of the Sun. Partial Eclipse of the Sun. Partial Eclipse of the Sun. Partial Eclipse of the Sun. Total Eclipse of the Sun. Partial Eclipse of the Sun.

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Eclipses


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eclipses

Eclipses

Data FirstModel Later

solar lunar
July 11, 1991

Jan 4, 1992

Jun 30, 1992

Dec 24, 1992

May 21, 1993

Nov 13, 1993

May 10, 1994

Nov 3, 1994

Apr 29, 1995

Oct 24, 1995

Jun 27 & Jul 26, 1991

Dec 21, 1991

Jun 15, 1992

Dec 9, 1992

Jun 4, 1993

Nov 29, 1993

May 25, 1994

Nov 18, 1994

Apr 15, 1995

Oct 8, 1995

Solar Lunar
solar lunar1
Oct 24, 1995

Apr 17, 1996

Oct 12, 1996

Mar 9, 1997

Sep 2, 1997

Feb 26, 1998

Aug 22, 1998

Feb 16, 1999

Aug 11, 1999

Feb 5, 2000

Oct 8, 1995

Apr 4, 1996

Sep 27, 1996

Mar 24, 1997

Sep 16, 1997

Mar 13, 1998

Aug 8 & Sep 6, 1998

Jan 31, 1999

Jul 28, 1999

Jan 21, 2000

Solar Lunar
slide23
Lunar Eclipse

Full

Opposition

at Night

Solar Eclipse

New

Conjunction

Daytime

eclipses1

Eclipses

Data FirstNow Model

slide31

Solar Eclipse

Moon Blocks Sun

Moon Casts a Shadow on Earth

slide32

Lunar Eclipse

Earth Blocks Sun from Moon

Moon Passes Through Earth’s Shadow

slide34

Earth Bigger than Sun

Shadow Bigger than Earth

Shadow 2x Moon

Sun 20x Moon

Can't Be True

slide35

Earth Smaller than Sun

Shadow Smaller than Earth

Shadow 2x Moon

Sun 20x Moon

Earth Smaller than Sun

Earth > 1/10 Sun

Earth 1/7 Sun

Really 1/109 Sun

slide36

Umbra

Penumbra

the earth s umbra
The Earth’s Umbra

Solid Earth blocks direct sunlight.

Earth’s atmosphere bends light.

Earth’s atmosphere scatters blue light.

Only red light fills the umbra.

slide55

How often new moon?

How often full moon?

Why are there only eclipses every 6 months?

slide56
Lunar Eclipse

Full

Opposition

at Night

Solar Eclipse

New

Conjunction

Daytime

On Ecliptic

At Node

solar lunar2
Feb 5, 2000

Jul 1 & 31, 2000

Dec 25, 2000

Jun 21, 2001

Dec 14, 2001

Jun 10, 2002

Dec 4, 2002

May 31, 2003

Nov 23, 2003

Apr 19, 2004

Jan 21, 2000

Jul 16, 2000

Jan 9, 2001

Jul 5, 2001

Dec 30, 2001

May 26 & Jun 24, 2002

Nov 20, 2002

May 16, 2003

Nov 9, 2003

May 4, 2004

Solar Lunar
solar lunar3
Apr 19, 2004

Oct 14, 2004

Apr 8, 2005

Oct 3, 2005

Mar 29, 2006

Sep 22, 2006

Mar 19, 2007

Sep 11, 2007

Feb 7, 2008

Aug 1, 2008

May 4, 2004

Oct 28, 2004

Apr 24, 2005

Oct 17, 2005

Mar 14, 2006

Sep 7, 2006

Mar 3, 2007

Aug 28, 2007

Feb 21, 2008

Aug 16, 2008

Solar Lunar
ancient astronomy
Planets

Retrograde

Prograde

Heliocentric

Geocentric

Ancient Astronomy

Sun/Moon/Earth

Phases

Eclipses

Solar

Lunar