# Orbiting Our Sun All of the planets in our solar system revolve around our Sun. Today you will investigate the speeds at which they move around.

## Presentation on theme: "Orbiting Our Sun All of the planets in our solar system revolve around our Sun. Today you will investigate the speeds at which they move around."— Presentation transcript:

Orbiting Our Sun All of the planets in our solar system revolve around our Sun. Today you will investigate the speeds at which they move around.

Orbital distance = 2 x 3.14 x 148,800,000 km
Orbital distance per day = km = 2,560,000 km Orbital speed per hour = km/h = 107,000 km/h

The Moon Orbital period = 28 days Distance from Earth = 384,000 km
Orbital distance = 2 x 3.14 x 384,000 = 2,411,520 km Orbital distance per day = km = 86,136 km Orbital speed per hour = km/h = 3589 km/h This is 1 km/s

Which is Fastest? radius x 2 x 3.14
circumference or orbiting distance around the Sun  number of days or orbital period distance planet travels per day (Earth day!)  24 speed of planet in km/h (Earth hour!) Which is Fastest?