solar system physics

1. WELCOME

2. The sun and the celestial bodies which revolve
around it form the solar system. It consist of
large number of bodies such as planets, comets,
asteroids and meteors. The gravitational
attraction between the sun and these objects
keeps them revolving around it.

3. The Sun
 The Sun is the nearest star from us. It is continuously
emitting huge amounts of heat and light. The Sun is the
source of almost all energy on the Earth. In fact, the Sun is
the main source of heat and light for all the planets.

4. The Planets
 The Planets look like stars, but they do not have light of their
own. They merely reflect the sunlight that falls on them.
 The simplest method of identifying planets from stars is that
stars twinkle, whereas planets do not. Also the planets keep
changing their positions with respect to the stars.
 A planet has a definite path in which it revolves around the
Sun. This path is called an orbit. The time taken by a planet to
complete one revolution is called its period of revolution. This
period of revolution increases as the distance of the planet
increases from the sun.

5. Planets
 Mercury
Venus
 Earth
 Mars
 Jupiter
 Saturn
 Uranus
 Neptune

6.  Mercury, Venus, Earth and Mars are mainly composed
of solid substances like rocks, iron and nickel. They are
called terrestrial planets.
 Jupiter, Saturn, Uranus and Neptune are mainly
composed of condensed gases such as hydrogen and
methane. They are called Jovian planets.

7. Name of the
planet
Radius of the
planet(Earth’s
radius taken
as 1 unit)
Distance from
the
Sun(distance
towards earth
is taken as 1
unit)
Density Number of
satellites
Mercury 0.46 0.39 5.5 0
Venus 0.95 0.72 5.23 0
Earth 1.00 1.00 5.517 1
Mars 0.55 1.50 3.96 2
Jupiter 11.00 5.20 1.33 63
Saturn 9.00 9.50 0.68 47
Uranus 4.00 19.20 1.60 27
Neptune 3.9 30.00 2.30 13

8. THANK YOU