General Knowledge

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GENERAL
KNOWLEDGE

madopol@yahoo.com

GENERAL KNOWLEDGE
LATEST STUDY MATERIALS WITH KEY POINTS

THE UNIVERSE
SOLAR SYSTEM - STATISTICS
The solar system consists of the Sun and 9 planets
revolving around it in different orbits. The statistics of

the sun and the planets are given below :
SUN
Age
Distance

:
:

About 5 Billion years
149.8 Million Kms

Diameter

:

1,38,400 Kms.

Photosphere temperature
Core temperature

:
:

5,770 K
150,000,000 K

Absolute visual magnitude : 4.75
Rotation (as seen from the
earth at the equator)
: 25.38 days
Rotation (near the poles) : 33 days
The sun consists of 71% of Hydrogen, 26.5% Helium and
2.5% of other elements.
The rays of the Sun take about 8 minutes to reach the
earth.

PLANETS
(1) MERCURY

Average distance
to the Sun
Diameter
Period of revolution
Period of rotation

:

It is the planet nearest to
the earth.

:
:
:
:

57.6 Million Kms.
4,849.6 Kms.
88 days
58 days 15 hrs 30 mts. 34

sec.
(2) VENUS

:

It is also known as the
Morning Star or the
Evening Star. It is the
brightest of all the

Diameter
Period of revolution
Period of rotation

:
:
:

planets.
12,032 Kms.
225 days
243 days 14mts.

(3) EARTH
Equatorial diameter
:
Polar diameter
:
Distance from the Sun :
Period of revolution
:
Period of rotation

:

12,756 Kms.
12,714 Kms.

149,597,900 Kms.
365 days 5 hrs, 48 mts,
45.51 sec.

(4) MARS
Diameter
:
Distance from the Sun :
Period of revolution
:
Period of rotation
:
(5) JUPITER

:

Diameter
:
Distance from the Sun :
Period of revolution
:
Period of rotation
:
(6) SATURN

:

6,755.2 Kms.
225.6 Million Kms.
687 days
24 hrs 37 mts. 22.663 sec.

This is the largest planet
in the solar system.
141,968 Kms.
772.8 Million Kms.
11.9 years
9 hrs 50 mts. 30 sec.

Diameter
:
Distance from the Sun :
Period of revolution
:
Period of rotation
:

It was discovered by
Galileo.
119,296 Kms.
1,417.6 Million Kms.
29.5 years
10 hrs 14 mts.

(7) URANUS
:
Diameter
Distance from the Sun :
Period of revolution
:
Period of rotation
:

52,096 Kms.
2,852.8 Million Kms.
84 years
16 hrs 10 mts.

(8) NEPTUNE

Diameter
:
Distance from the Sun :
Period of revolution
:
Period of rotation
:
(9) PLUTO

:

49,000 Kms.
4,497 Million Kms.
165 years
18 hrs 26 mts.
This is the coldest and
smallest of all planets. It
is also the most distant

Diameter
:
Distance from the Sun :
Period of revolution
:
Period of rotation
:

one.
3,040 Kms.
5,865.6 Million Kms.
248 years
6 days 9 hrs and 18 mts.

:

Moon is earth's satellite.

MOON

23 hrs 56 mts. 4.09 sec.
© THE RAMAN’S BOOKS

Its period of rotation and
Period of Revolution are

1
the same. i.e.29

days.
2

2

THE EARTH DATA
Surface Area
Land Surface

: 510,100,500 Sq.Kms.

: 148,950,800
(29.08%)
Water Surface
: 361,149,700
(70.92%)
Equatorial circumference : 40,075 Kms.
Polar circumference
: 40,008 Kms
Equatorial radius
: 6,377 Kms.
Equatorial Diameter
: 1,22,756 Kms.

Sq.Kms.
Sq.Kms.

Polar radius

: 6,357 Kms.
: 12,714 Kms.

Polar Diameter
Mean distance from the
: 14,95,97,900 Kms.
Sun
Period of revolution
: 365 days 5 hours 48 mts.
45.51 Sec.
Period of rotation

: 23 hrs. 56 mts. 4.091 Sec.

Escape Velocity from
the earth

: 11 Km per Sec. (minimum)

THE WORLD

The planets radiate no light of their own, but shine
with that reflected from the Sun. The Sun has a diameter

The seasons are due to the change of the Earth’s
position in the course of its revolution about the Sun,
and to the inclination of its axis. The Equator is an
imaginary line drawn round the Earth midway between
the Poles. There are two other lines, namely, Tropic of
Cancer (23½O N) and the Tropic of Capricon (23½O S).
The word tropic means, ‘turning place’. The inclination
of the Earth’s axis together with its...
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