BS honors 5th
Department of Geography
History of eclipse
Types of eclipse
History of eclipse
wrote of an eclipse
occurring over 4000
that this was an eclipse
that happened on 22
October 2134 B.C.
Two astrologers at the
time, Hsi and Ho, had
apparently failed to
predict this eclipse, and
so were beheaded.
Types of Eclipse
There are two types of eclipse
When the Moon is in the full moon position,
the light from the Sun may be blocked by the
Earth which casts a shadow. As the Moon
travels into the shadow it is gradually
If you are in the umbra of the shadow, you will see a total eclipse.
If you are in the penumbra of the shadow, you will have a partial eclipse
Types of Lunar Eclipses
Total Lunar Eclipse – when the Moon
passes completely into the Umbra, or
total shadow of the Earth.
Partial Lunar Eclipse – Occur when the
Moon does not fully move into the
Penumbral Lunar Eclipse – When the
moon passes only through the
penumbra, or partial shadow. They are
Total Lunar Eclipse
when the Moon passes completely into
the Umbra, or total shadow of the Earth.
• Longest total eclipse – 7:31 m:ss
• Longest annular eclipse – 12:30
• Longest eclipses in the 20th century – 3
– June 1937 – 7:04
– June 1955 – 7:08
– June 1973 – 7:04
• Number of total eclipses longer than 7
minutes in the 21st century – 0
This is an animation showing a total lunar eclipse from start
Solar Eclipse- When the Moon casts a shadow on the
Earth, causing the sun to go dark. The Moon comes
between the Sun and Earth and casts a shadow on part
Here is an animation showing a total solar eclipse
Remember that it is not safe to stare at a solar eclipse !!!
This animation shows that the moon creates a small shadow which
Only allows certain areas of the earth to see a total solar eclipse.
Asteroids, the meteorites and
An asteroid is a small planetary body that
revolves around the sun. (as minor planets or
There are two main types of asteroids; one is
grouped as dominating the outer area of the
belt and being rich in carbon. The other is
found in the inner part of the belt and
composed mostly of melted minerals.
Asteroids vary in size from as big as 933km
(Ceres) to only 6m in diameter.
around the Sun
in orbits that
origins in the
By studying both the
brightness and the
reflectivity of certain
colours it becomes
clear that asteroids
fall into several
M are believed to be
C are thought to be
S contain more
Impact's of Asteroids
On the earth surface
26 very large asteroids have been
discovered, which is probably most of
the big ones.
But there are still millions of smaller
ones that we have yet to see because
they are too tiny, only a mile or so
12 space satellites are destroyed by
the collision of asteroid which is a
huge lose for their owner countries
Asteroid impact on earth
Barringer Crater in Arizona
It is 1.2 kilometers across and 200 meters deep, and was formed
about 49,000 years ago by the impact of a 50 meter nickel/iron
meteorite traveling at a speed of 11 kilometers per second.
10km in diameter
A comet is an icy body that releases
particles of gas and dust.
It contains a solid core made of ice
and rock surrounded by a cloudy
coma and one or two tails.
Scientists believe there are two
places where comets come from.
Short-term comets come from the
Kuiper belt beyond Pluto and longterm comets come from the Oort
Comets lose ice and dust while they
travel leaving debris behind.
Differences of Comets and
Comets are made of ice and rock as
well as dust particles.
Asteroids are made of either carbon or
Comets have a core or nucleus, a coma
and a tail
Asteroids are just one whole part.
Comets come from the Oort cloud and
the Kuiper belt.
Asteroids come from the asteroid belt
Comets are very large; comas can be
1.6 million km and tails have been
known to extend to 160million km
Asteroids are usually under 1000kms in
Small pieces of space debris
(usually parts of comets or
asteroids) that are on a collision
course with the Earth are called
When meteoroids enter the
Earth's atmosphere they are
If the meteors survive and
strike the surface of the Earth
they are called meteorites.
Formation of Meteorites
Most meteorites come from
the asteroid belt.
This is a region between
Mars and Jupiter that
contains many rock
fragments broken off from
There are 31,000 meteorites
that we know about and all
but 139 came from here.
A small number of meteorites are made from
particles from other planets. They are known as
A small number of non-asteroid meteorites come
from the moon.
Several hundred tons of meteoroids enter the
Earth's atmosphere each day. Most of these are
very small pieces (milligrams) that burn up quickly
in the atmosphere and never reach the surface.
Examples of meteorites fall
The first human we know to be hit
by a meteorite is Ann Hodges who
lived in Alabama, USA. In 1954
The oldest report is from 1911 in
Egypt when a dog was said to have
been killed by a Martian meteorite.
The Barwell meteorite was the
biggest to fall over Britain. It broke
up and fell as a shower of stones
over the village of Barwell on
Christmas eve, 1965.
fall on Britain.
Black hole is a very
powerful gravity that can
grab a tiniest or the
A black hole is a region in
which gravitational field
is so powerful than
Light can also not escape
from their gravitational
Location of Black hole
Black hole are in
between of each
galaxies, there are
millions to billions
black hole in the
Black hole grabs
Because of black
hole the galaxies