Eclipse

1
Eclipse
A penny will hide the biggest star in the
universe if you hold it close enough to your eye.
  -- Samuel Grafton
Nature is an infinite sphere whose center is
everywhere and whose circumference is nowhere.
   -- Blaise Pascal
2
Solar Eclipses
The Sun is vanishing! The Sun is going out! The
daylight is retreating!
Bad Omens All! The Gods are MAD!
3
A view from the past.
Zeus, the father of theOlympic Gods,
turnedmid-day into night, hiding the lightof
the dazzling Sunand sore fear came upon
men. Archilochus (c680-c640 BC)
4
The Modern View
The answer lies hidden among the shadows.
5
Shadow Structure
Umbra
6
Solar Eclipse Details
Moon
What is the phase of the moon?
New Moon!
7
Solar Eclipse Images
8
(No Transcript)
9
(No Transcript)
10
(No Transcript)
11
Total Solar Eclipse
12
(No Transcript)
13
(No Transcript)
14
(No Transcript)
15
(No Transcript)
16
A Total Solar Eclipse from beginning to end
17
(No Transcript)
18
(No Transcript)
19
(No Transcript)
20
(No Transcript)
21
(No Transcript)
22
Interesting Features
23
(No Transcript)
24
(No Transcript)
25
The Diamond Ring
26
(No Transcript)
27
Why not a solar eclipse every month then?
Moon
Earth
5o
Ecliptic
Moons Orbit
Sun
Moon's orbit is tilted about 5o with respect to
the Earth's orbit (ecliptic), so the shadows
usually miss!
28
  But, the Moon passes through the ecliptic
twice a month. IF at new moon - SOLAR ECLIPSE
probability.
29
Annular Solar Eclipse
30
Partial Solar Eclipse
During a total solar eclipse, depending on your
location during the event, you might only see
part of the Suns face blocked because of your
observing vantage point.
31
A Lunar Eclipse
Moon
A lunar eclipse occurs when the Earth lies
between the Sun and Moon, so that Earth's shadow
darkens the Moon.
32
This image shows a complete transition during a
lunar eclipse. Notice that the phase of the moon
is full.
33
(No Transcript)
34
(No Transcript)
35
(No Transcript)
36
The moon becomes a blood red color during a total
lunar eclipse. No wonder that ancient cultures
feared the appearance of the moon during a lunar
eclipse.
37
(No Transcript)
38
Lunar Eclipse Types
Total Penumbral Eclipse
Total Lunar Eclipse
Partial Lunar Eclipse
Partial Penumbral Eclipse
39
(No Transcript)
40
The Blood Moon
The moon often does not totally disappear during
a total lunar eclipse. Instead it can be seen as
a very dark red color because of the refraction
of sunlight through the Earth's atmosphere.
41
The End
You cannot create experience. You must undergo
it. -- Albert Camus