·
The solar system consists of the sun, the eight
planets and their satellites (or moons), and thousands of other smaller
heavenly bodies such as asteroids, comets and meters.
·
The sun is at the center o f the solar system
and all these bodies and revolving around it.
·
The gravitational pull of the sun keeps all the
planets and other objects revolving round it. Thus, the motion of all the
members of the solar system is governed mainly by the gravitational force of
the sun.
·
Planets revolve around the sun in elliptical
orbit.
·
In the solar system the planet nearest to the
sunismercury and the planet farthest from the sum is Neptune (not Pluto).
·
The size of solar system has been estimated to
at about 10⁵
A.U.
·
The solar system is dominated by the sun which
accounts for almost 99.9% of the matter in the whole solar system.
·
The sun is also the soured of all the energy in
the solar system.
·
Pluto is a dwarf planet.
·
Mercury, Venus, earth, mars are called terrestrial
planets and Jupiter Saturn, Uranus and Neptune are called gaseous planets.