There are Sun
and 9 planets revolving around it in different orbits in the solar system. The
statistics of the sun and the planets are given under.
The Sun
Age: About 5
Billion years
Distance:
149.8 Million Kms
Diameter:
1,38,400 Kms.
Photosphere
temperature: 5,770 K
Core
temperature: 150,000,000 K
Absolute
visual magnitude: 4.75
Rotation (as
seen from theearth 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.
Comparative planetary and stellar sizes
Planets
MERCURY : It is the planet nearest to the earth.
Average
distance to the Sun: 57.6 Million Kms.
Diameter :
4,849.6 Kms.
Period of
revolution : 88 days
Period of
rotation : 58 days 15 hrs 30 minutes . 34 sec.
VENUS: Also known as the Morning Star or the Evening Star. It is the brightest of
all the planets.
Diameter :
12,032 Kms.
Period of
revolution : 225 days
Period of
rotation : 243 days 14mts.
EARTH
Equatorial
diameter : 12,756 Kms.
Polar
diameter : 12,714 Kms.
Distance
from the Sun : 149,597,900 Kms.
Period of
revolution : 365 days 5 hrs, 48 mts,
45.51 sec.
Period of rotation : 23 hrs 56
mts. 4.09 sec.
MARS
Diameter :
6,755.2 Kms.
Distance
from the Sun : 225.6 Million Kms.
Period of
revolution : 687 days
Period of
rotation : 24 hrs 37 mts. 22.663 sec.
JUPITER : This is the largest planet in the solar system.
Diameter :
141,968 Kms.
Distance
from the Sun : 772.8 Million Kms.
Period of
revolution : 11.9 years
Period of
rotation : 9 hrs 50 mts. 30 sec.
SATURN : It was discovered by Galileo.
Diameter :
119,296 Kms.
Distance
from the Sun : 1,417.6 Million Kms.
Period of
revolution : 29.5 years
Period of rotation : 10 hrs 14
mts.
URANUS
Diameter :
52,096 Kms.
Distance
from the Sun : 2,852.8 Million Kms.
Period of
revolution : 84 years
Period of
rotation : 16 hrs 10 mts.
NEPTUNE
Diameter :
49,000 Kms.
Distance
from the Sun : 4,497 Million Kms.
Period of
revolution : 165 years
Period of
rotation : 18 hrs 26 mts.
PLUTO : This is the coldest and smallest of all planets. It is also the most
distant one.
Diameter :
3,040 Kms.
Distance
from the Sun : 5,865.6 Million Kms.
Period of
revolution : 248 years
Period of
rotation : 6 days 9 hrs and 18 mts.
MOON : Moon is earth's satellite. Its period of rotation and Period of Revolution
are the same.
i.e.29 ½ days.
See how big are we here on Earth when compared to other planets.
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