Contains one star
8 planets, Mercury, Venus, Earth, Mars, Jupiter, Saturn,
Uranus, Neptune and Pluto
Planets orbit the sun
Solar Sys
Dwarf Planets like Pluto which are too small to meet all the
rule to be a planet
Natural satellites: Orbit planets, non man made
Artificial satellites: Man made, many orbit the earth
In the Milky Way Galaxy
If an object is travelling in a circle, it is constantly changing direction
Constantly changing velocity
For an object to accelerate, there must be a force acting on it.
Orbits
For circular motion, the force is directed toards the centre of
the circle (centripetal force)
An orbit is the balance between the force providing the acceleration
and the forward motion (instantaneous veolcity) of the object
The object keeps accelerating the what it's orbiting, but the
instantaneous velocity keeps it travelling in a circle
8 planets, Mercury, Venus, Earth, Mars, Jupiter, Saturn,
Uranus, Neptune and Pluto
Planets orbit the sun
Solar Sys
Dwarf Planets like Pluto which are too small to meet all the
rule to be a planet
Natural satellites: Orbit planets, non man made
Artificial satellites: Man made, many orbit the earth
In the Milky Way Galaxy
If an object is travelling in a circle, it is constantly changing direction
Constantly changing velocity
For an object to accelerate, there must be a force acting on it.
Orbits
For circular motion, the force is directed toards the centre of
the circle (centripetal force)
An orbit is the balance between the force providing the acceleration
and the forward motion (instantaneous veolcity) of the object
The object keeps accelerating the what it's orbiting, but the
instantaneous velocity keeps it travelling in a circle
