Eclipses

1
Eclipses

• Data FirstModel Later

2
Annular Eclipse of the Sun
3
Total Eclipse of the Sun
4
Total Eclipse of the Sun
5
Total Eclipse of the Sun
6
Partial Eclipse of the Sun
7
Partial Eclipse of the Sun
8
Partial Eclipse of the Sun
9
Total Eclipse of the Sun
10
Partial Eclipse of the Sun
11
Partial Eclipse of the Sun
12
Partial Eclipse of the Sun
13
Total Eclipse of the Moon
14
Total Eclipse of the Moon
15
Total Eclipse of the Moon
16
Total Eclipse of the Moon
17
Partial Eclipse of the Moon
18
Partial Eclipse of the Moon
19
Partial Eclipse of the Moon
20
Partial Eclipse of the Moon
21
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

22
Solar Lunar

• 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

23

• Lunar Eclipse
• Full
• Opposition
• at Night

• Solar Eclipse
• New
• Conjunction
• Daytime

24
July 11, 1991
25
July 11, 1991
26
July 11, 1991
27
May 10, 1994
28
May 10, 1994
29
May 10, 1994
30
Eclipses

• Data FirstNow Model

31
Solar Eclipse Moon Blocks Sun Moon Casts a Shadow
on Earth
32
Lunar Eclipse Earth Blocks Sun from Moon Moon
Passes Through Earths Shadow
33
(No Transcript)
34
Earth Bigger than Sun
Shadow Bigger than Earth
Shadow 2x Moon Sun 20x Moon Can't Be True
35
Earth Smaller than Sun
Shadow Smaller than Earth
Shadow 2x Moon Sun 20x Moon Earth Smaller than Sun
Earth gt 1/10 Sun Earth 1/7 Sun Really 1/109 Sun
36
Umbra Penumbra
37
(No Transcript)
38
(No Transcript)
39
Waxing Gibbous
40
Waxing Crescent
41
(No Transcript)
42
(No Transcript)
43
The Earths Umbra

• Solid Earth blocks direct sunlight.
• Earths atmosphere bends light.
• Earths atmosphere scatters blue light.
• Only red light fills the umbra.

44
(No Transcript)
45
(No Transcript)
46
(No Transcript)
47
(No Transcript)
48
(No Transcript)
49
(No Transcript)
50
(No Transcript)
51
(No Transcript)
52
Annular Eclipse of the Sun
53
Total Eclipse of the Sun
54
(No Transcript)
55
How often new moon? How often full moon? Why
are there only eclipses every 6 months?
56

• Lunar Eclipse
• Full
• Opposition
• at Night

• Solar Eclipse
• New
• Conjunction
• Daytime

On Ecliptic At Node
57
(No Transcript)
58
Eclipse Frequency
59
Eclipse Frequency
60
Eclipse Frequency
61
Eclipse Frequency
62
Eclipse Frequency
63
Solar Lunar

• 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

64
Solar Lunar

• 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

65
Ancient Astronomy

• Sun/Moon/Earth
• Phases
• Eclipses
• Solar
• Lunar

• Planets
• Retrograde
• Prograde
• Heliocentric
• Geocentric