There are two types of satellites: natural and artificial. Natural satellites like the Moon orbit planets, while artificial satellites are human-made objects placed into orbit, like Sputnik 1. There are different types of artificial satellites depending on their orbit, such as geostationary satellites that orbit over the equator at a fixed position, and polar satellites that orbit from pole to pole. The escape velocity of a satellite is the minimum speed needed to escape the gravitational pull of the object it orbits, and varies based on location in the solar system. Kepler's laws describe satellite motion, such as elliptical orbits with the orbited body at one focus.

1. Nokesh
SATELLITE by Prabhakar

2. Satellite:- revolves around planet,
Uniform velocity,
fixed orbit
Satellite are of two types:-
1.Artificial satellite
•Ex-polar satellite
2.Natural satellite
•Ex-moon

3. Natural Satellite:- A Natural Satellite is a
Natural Body which revolves
around(orbits) a Planet .It is usually called moon and is
large and ball shaped.
There are 177 natural satellite in our solar system.
Mercury-0
Venus-0
Earth-1
Jupiter-67
Saturn-62
Uranus-27
Neptune-13
Mars-2
Pluto-5

4. Artificial Satellite:-A Artificial Satellite is an
object which has been placed
into orbit by human endeavour.
Sputnik 1 –launched by Soviet union in 1957.
Artificial Satellite is of two types :-
1..Geostationary Satellite
2. Polar Satellite.

6. Geostationary Satellite
1.Rotates around the Earth over equator
2.Fixed over a particular place
3.40,000 km above the Earth surface
4.Time period is 24 hours
5.Used in telecommunication

8. Polar Satellite
1.Rotates around the Earth from pole to pole
2.Rotate around the Earth 8-10 times per day
3.Only 300-400 km above the earth surface
4.Time period is 2-3 hours
5.Used in weather broadcasting ,remote sensing and G.p.s

10. Escape Velocity of a Satellite:- maximum
speed to which a object is projected so that it
moves out of gravitational field .
Luna 1

11. The escape velocity of a satellite is
with with
Locatio Locatio
respect Ve[2] respect Ve[2]
n n
to to
on the
617.5 k
the Sun Sun's
m/s
, gravity:
Mercury at the
on Merc 4.3 km/ 67.7 km
's Mercury Sun's
ury, s /s
gravity: , gravity:

12. the at the
11.2 km/ the Sun's 42.1 km/
on Earth, Earth's Earth/Mo
s gravity: s
gravity: on,
on the the
at the
the Moon Moon's 2.4 km/s Earth's 1.4 km/s
Moon,
, gravity: gravity:
Mars' the Sun's 34.1 km/
on Mars, 5.0 km/s at Mars,
gravity: gravity: s
on Jupite Jupiter's 59.5 km/ at the Sun's 18.5 km/
r, gravity: s Jupiter, gravity: s

13. on Satur Saturn's 35.6 km at the Sun's 13.6 km
n, gravity: /s Saturn, gravity: /s
on Uran Uranus' 21.2 km at the Sun's 9.6 km/
us, gravity: /s Uranus, gravity: s
Neptune' at
on Nept 23.6 km the Sun's
s Neptune 7.7 km/
une, /s gravity:
gravity: ,
on Pluto, Pluto's gravity: 1.2 km/s
the Milky Way's
in the Solar System, ≥ 525 km/s[3]
gravity:
a black hole's
on the event horizon, = 299,792 km/s
gravity:

14. Orbital Velocity:- velocity at which an
satellite rotates around a planet.
Orbital velocity of a satellite
=√gr
Relation between orbital velocity and Escape
velocity

16. Time Period of a satellite:- time
taken by a satellite for 1 revolution.
The time period of a satellite
T=2∏r×√r
√GM

17. Height of a satellite:- the
expression to find out height of
satellite is

18. Total Energy of a satellite :-
Kinetic energy of a satellite=
GMm
2r
Potential energy of a satellite=
-GMm
r
Total energy of a satellite= K.E-P.E
=GMm - GMm
2r r
=-GMm
2r

19. Kepler‘s law of Elliptical orbit
According to kepler’s 1st law the orbits of all planets
are elliptical and sun remains at one of the focus

20. Kepler’s law of aerial velocity
According to kepler’s 2nd law , a planet
covers equal area in equal interval of time.

21. Kepler’s law of time period
According to kepler’s 3rd law ,square of the
time period is directly proportional to the
cube of the semi-major axis.
T² r³