2. SOLAR SYSTEM
STARS
GALAXY
PLANETS
ASTEROIDS
COMETS
METEORS
SATELLITES
3. SOLAR SYSTEM
The solar system
consists of nine planets,
61 known moons; vast
no. of comets, asteroids
and meteoroids and
interplanetary gas & dust.
Large theories suggest
that the solar system
began 4.6 billion years
ago as a spinning cloud
of
gas & dust that
4.
5. STARS
The sun, a main source of
light ,is about five billion
years old. It is composed
almost entirely of helium and
hydrogen .The sun’s surface,
the photosphere has temp. of
about 5,500 C. The sun
mainly has four layers; the
core, the photosphere, the
corona and the
chromosphere.
6. STARS
During the solar eclipse,
moon moves in between
the sun and the earth.
The light from the outer
part of the sun’s
atmosphere, called the
corona becomes visible during the total solar
eclipse. In other words , the sun is hidden
by the moon . This is known as solar
eclipse.
7. STARS
Stars are large celestial
composed of
gravitationally contained
hot gases emitting
electromagnetic especially
light as a result of nuclear
reactions inside the star.
Some stars are black hole,
supernova ,red giant etc.
8. Galaxy, collection of stars ,
low density gases bound
together by their own
gravity. Galaxies are the
building blocks of the
universe. The first picture
shows the Andromeda
galaxy and the second
picture shows the
Milky way galaxy , in which
the solar system is situated.
9. A planet is a large round object in space
that orbits around a star. There are nine
planets in solar system. They are:
Mercury is the closest
planet to the sun. It is a
small, rocky planet. Its
surface has been heavily
cratered by meteorites. It
completes one revolution
around the sun in 88 days.
10. Venus is called the morning
and the evening star as it is
the brightest object in the
sky.Venus is the hottest
planet of solar system.
The fifth largest planet in
the solar system is earth.
Earth is the only planet
which support to life. It is
the third nearest planet to
the sun.
11. Mars is the known red planet
because of red iron oxide
dust that cover its surface.
Mars includes the volcano
Olympus Mons i.e. the biggest
volcano in the solar system.
Jupiter is the largest planet
in the solar system. It
occupies the fifth position in
solar system.
12. Saturn is the sixth planet
from the sun and second
largest planet in the solar
system. Saturn has a
beautiful ring system.
Uranus is the third largest
planet of the solar system.
It has 15 moons , 10 rings.
It has a blue- green color
due to methane.
13. Neptune is known as the blue
planet. It is the fourth
largest planet. This planet
shows a blue color because of
the presence of methane in
the atmosphere
Pluto is not a planet, it’s a
dwarf planet that is located
in the outermost of the solar
system. That’s why is the
farthest planet from Sun.
14. ASTEROIDS
Asteroids are one of the
many small or minor
planets that move in the
elliptical orbits primarily
between the orbits of Mars
and Jupiter. They
also orbits the sun, most of them travel in a
between mars and Jupiter. Jupiter’s gravitational
pull send asteroids into erratic orbits, causing
them to collide with other planets and other
asteroids.
15. COMETS
A mass of ice and dust with
a long tail, moving around
the solar system . Comets
look like shooting stars
.Here is one example of
comet, Halley’s comet .
This comet reappears
every 76 years. The
comet’s orbit which it
passes is closest to the
sun.
16. Meteors
Meteors are small
bodies of matter
from outer space
that glows like a
shooting star.
A piece of rock or
metal that has fallen to the earth from space
is known as a Meteorite. A small body that
would become a meteor if it entered the
earth’s surface us known as a Meteoroid.
