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Glossary
1 Astronomer Scientist who studies object in space
2Astronomy The science that deals with the universe beyondEarth
3 Corona The bright, white light seen round the Sun duringa solar eclipse
4 Crescent The shape of the Moon during its first and lastquarter/ it resembles a segment of a ring withsharp ends
5 Eclipse An occasion when the Earth passes between theMoon and the Sun so that you cannot see all orpart of the Moon for a time
6 Half Moon The first-quarter or third-quarter phase of the
Moon / it is equal to one half of the visible side ofthe Moon when illuminated
7 Lunar Anything having to do with the Moon
8 Eclipse of the Moon The eclipse is seen when the dark part of theEarth falls on the Moon / it is also known as lunar
eclipse
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9 Orbit The path of an object in space going round
another object
10 Phase The shape of the Moon appears to be as seen fromthe Earth
11 Planet Large round objects in the solar system thatrevolve round the Sun and receives light from it
12 Revolution The movement of one object round another
13 Rotation The spinning of an object
14 Shadow The dark area formed by an objects which blockslight
15 Telescope The instrument that makes distant objects appearnearer and larger
16 Umbra The area in a dark part from which light iscompletely cut off
17 Penumbra A lighter area between the umbra and the edge ofa dark part
Glossary
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Eclipses
Eclipse ofThe Moon
Eclipse ofThe Sun
The Earth is between the Sun
and the Moon and the threeof them lie in a straight line
The Moon is between the Sun
and the Earth and the threeof them lie in a straight line
The Earth blocks Sunlight
from reaching the moon
The Moon looks reddish,
dark grey or brown.
Sunlight is
Blocked by
The Moon
The Moons
shadow falls
On the earths
surface
Daylight
becomes dark
during the
total eclipse
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EclipsesEclipses
Whats in the middleWhats in the middle
During Solar eclipseDuring Solar eclipse
Moon is in the middleMoon is in the middle
Between Sun and the EarthBetween Sun and the Earth
Where would the Earth beWhere would the Earth be
On lunar eclipseOn lunar eclipse
Earth will be hidingEarth will be hiding
Between Moon and SunBetween Moon and Sun
(Row row your boad)(Row row your boad)
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The eclipse of the Moon occurs when the earth is between the
Sun and the Moon and the three of them lie in a straight line.
When the earth is between the Sun and the Moon and the three of
them lie in a straight line, sunlight cannot pass through the earthbecause it is an opaque object.
As sunlight travels in straight lines, it cannot bend around the
Sun.
Therefore, the Earth blocks the sunlight from reaching the Moon.
The Earths shadow will cover the Moons surface and causes a
lunar eclipse
An eclipse of the Moon can only occur at the phase of full Moon.
When the Earth blocks sunlight , it produces a shadow with tworegions, the umbra and the penumbra.
The eclipse of the Moon can last for more than an hour.
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Phases of the MoonPhases of the Moon
The appearance or shape of the Moon gradually
changes through the course of a month. This
cycle - the cycle of lunar phases, may be
explained if we state the following:
1. The Moon is spherical in shape.
2. The Moon is not self-luminous, but rather
reflects the light of the distant Sun.
3. The Moon circles the Earth once per month.
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Moon's shadow on Earth taken by
French cosmonaut Jean-PierreHaigner aboard the Mir
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The eclipse of the Sun occurs when the Moon is between the Sun
and the Earth and the three of them lie in a straight line.
An eclipse of the Sun can occur at the phase of the New Moon
when the Moon passes between the Earth and the Sun.
When the Moon is between the Sun and the Earth and the three of
them lie in straight line , the Moon blocks the sunlight.
When the Moon blocks sunlight , it produces a shadow with two
regions, the umbra and the penumbra. The total eclipse of the Sun is very brief. It last for only a few
minutes.
During the eclipse of the Sun, the sky gets darker and darker until
eventually it becomes completely dark during the day. It is dangerous to look at a solar eclipse directly. Our eyes can be
seriously damaged if we look directly at it.
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Solar Eclipse Geometry 1Solar Eclipse Geometry 1
Full
Moon
To Sun
To Sun
Earth
Moon
Earth and Moon: Full Moon
The Moon orbits Earth
once every 29.5 days with respect to the Sun
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Solar Eclipse Geometry 2Solar Eclipse Geometry 2
To Sun
To Sun
Earth
New
Moon
Earth and Moon: New Moon
Moon
The Moon orbits Earth
once every 29.5 days with respect to the Sun
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Solar Eclipse Geometry 3Solar Eclipse Geometry 3
To Sun
To Sun
Earth
New
Moon
Earth and Moon: Solar Eclipse Geometry
Penumbra
Umbra
Moon
An eclipse of the Sun
is only possible during the New Moon phase.
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Solar Eclipse Geometry 4Solar Eclipse Geometry 4
To Sun
To Sun
Earth
New
Moon
Earth and Moon: Solar Eclipse Path
Penumbra
Umbra
Path of Totality
Moon
During a total solar eclipse
the Moons two shadows sweep across Earth.
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Solar Eclipse Geometry 4Solar Eclipse Geometry 4
Full
Moon
To Sun
To Sun
Earth
Moon
New
Moon
Earth and Moon: Solar Eclipse Geometry
Penumbra
Umbra
Path of Totality
Moon
The Moon orbits Earth
once every 29.5 days with respect to the Sun
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Image of a total solar eclipse. The corona is visible here.
The lines in the corona coming out radially from the sun .
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Total solar eclipse just prior to totality.
Reddish prominences can be seen off the suns limb.
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Solar eclipse animation.
These real images of an eclipse show what happens as
the moon blocks out the solar disk or photosphere.
The corona glows brightly. It is difficult to see the corona
if even a little bit of the photosphere is visible. Some structure
can be seen in the corona, again due to the suns magnetic field.
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GOES images of the Earth showing the path
of the moons shadow during the
August 11, 1999 total solar eclipse.
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A closer look at the 1999 eclipse.
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Total Solar Eclipse from Antarctica
Its possible to see a total eclipse from anywhere on
Earth. This image was shot in Antarctica in 2003.
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A i M i
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Solar eclipse have been generally explained in one of four ways: A celestial being, usually a monster, attempts to destroy the Sun
The Sun fights with its lover the Moon The Sun and the Moon make love and discreetly hide themselves in
darkness The Sun grows angry, sad, sick, or neglectful
Littmann and Willcox, Totality
Norse mythology: the wolflike giant Skllfollows the Sun hoping to devour it.
Ancient Egypt: the evil god Set was
thought to have leapt into the eye of the
Sun god, Horus.
Ancient China: A heavenly dog ate the
Sun.
Chippewa Indians shot flaming arrows at
the Sun hoping to rekindle the flames.
Ancient Meaning
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Chinese astrologers
wrote of an eclipse
occurring over 4000
years ago.
Historians and
astronomers believe
that this was an eclipse
that happened on 22October 2134 B.C.
Two astrologers at the
time, Hsi and Ho, had
apparently failed to
predict this eclipse,
and so were beheaded.
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EclipsesEclipses
Whats in the middleWhats in the middle
During Solar eclipseDuring Solar eclipse
Moon is in the middleMoon is in the middle
Between Sun and the EarthBetween Sun and the Earth
Where would the Earth beWhere would the Earth be
On lunar eclipseOn lunar eclipseEarth will be hidingEarth will be hiding
Between Moon and SunBetween Moon and Sun
(Row row your boad)(Row row your boad)
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TEST YOURSELF
What is the position of the Earth
during the eclipse of the Moon ?
What is the colour of the Moonduring the total eclipse of the Moon ?
How long does the total eclipse of
the Sun last ?
What is the lunar phase during
which a solar eclipse can occur ?
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