Page 104 - Genius Kidz Prudence Learning Sc-8

in size further the bright disc of the moon sensing.
starts on the decrease. This is called as (c) Navigation Satellite : These satellites help
wanning of the moon. in the management of traffic. They help in

Thus different patterns of light reflection give locating the position of aeroplanes and
rise to the different phases of the moon. ships.

Artificial Satellite : Man-made objects that are (d) Scientific Satellite : Satellites used for
made to revolve around a planet are called studying the events related to sun, moon,
earth covets, stars, etc. are scientific
satellites.

CONSTELLATIONS
Some stars in the sky arrange themselves in
the form of a recognizable group.
Arrangement of a group of stars in some

recognizable shapes like that of an animal,
human or any other object forms a
constellation.
Some common types of constellations include
Artificial satellite
ursa major and orion. Constellations are also
artificial satellites. They are placed in the orbit
called as nakshatra.
directly from the earth. Thereafter it uses solar
1. Ursa Major : Ursa major or great bear
energy to work. “Sputnik Ist” was the first
constellation consists of seven stars that
artificial satellite launched on October 4, 1957
by USSR. form up the shape of a bear.
Ursa major is commonly seen in the month
Application of Artificial Satellites : Different
of April to September. It is also called as
artificial satellites have different functions so
“saptarishi mandal” as it is formed of seven
they are named accordingly as :
stars.
(a) Communication satellites or COMSAT :
Satellite used for telecommunication is a
communication satellite.

Its application includes long distance
telephony, television and data transfer
(internet) as well as the direct broadcast of
an event to the television at homes. eg. LIVE
Cricket.

(b) Weather Satellite : These are used for
depiction of weather through remote

Ursa major

Neil Armstrong was the first scientist to land on moon on July 20, 1969. “Apollo”, was the vehicle that made his
journey to the moon possible.

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