Page 115 - SST Class 06

matters, pertaining to astrology, like casting of a
horoscope. Apart from this linkage of astronomy
with astrology in ancient India, science of astron-
omy continued to develop independently and
culminated into original findings, like :
g The calculation of occurrences of eclipses
g Determination of the Earth’s circumference
g Theorising about the theory of gravitation

g Determining that the Sun was a star and
Chandrasekhar
determination of number of planets under
series of satellites. These satelliters are being used
our solar system
in a variety of fields ranging from defence,
Indian space programme has taken a giant leap telecommunication, T.V., meteorology, diasaster
forward in the last 50 years. India has launched management, remote sensing, etc.
its own INSAT (Indian National Satellite System)

Terminology

Rescattered : move far apart in different directions
Crater : a large bowl-shaped cavity on a celestial object
Culminate : reach a climax or point of highest development

Inside Story
Inside Story

g The light from the Sun looks white. But, it is really made up of all the colors of the rainbow.
g Like energy passing through the ocean, light energy travels in waves, too.
g Sunlight reaches the Earth’s atmosphere and is scattered in all directions by all the gases
and particles in the air.
g A planet is described as a heavenly body whose place among the stars is not fixed.

g Mars takes 687 days to complete its orbit of the Sun and the average temperature is
(–63°C).
g When the Moon appears like a circular disc, it is called the full Moon.
g Indian space programme has taken a giant leap forward in the last 50 years.

A. Tick (3) the correct option.
1. When white light shines through a __________ , the light is separated into all its colours.

(a) prism (b) glass (c) crystal
2. This light waves are shorter than red light waves.
(a) Green (b) Yellow (c) Blue

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