Earth is the planet we live on and the one with water and life as we know it. It is the third largest planet of the nine that orbit the sun. The planets provide a lot of interesting numbers for measurement and computation. We will first examine the distance and size of the planets. Then we will study weight and age if we were to travel to different planets. The main purpose of this page is to learn scientific notation.  For additional information about the subject, click here to go to the 'Powers Quiz' page.

How far are the planets from the Sun?

 Planets Distance from Sun in km Approx. diameter in km Mercury 5.8 x 107 4, 840 Venus 1.03 x 108 12, 200 Earth 1.55 x 108 12, 756 Mars 2.28 x 108 6, 787 Jupiter 7.78 x 108 142, 200 Saturn 1.427 x 109 120, 600 Uranus 2.87 x 109 51, 300 Neptune 4.497 x 109 49, 100 Pluto 5.9 x 109 2, 300

Light travels at 300,000 km/second. How much time will it take to send a radio wave from Pluto to the Sun. (assume radio waves travel at the speed of light).

5,900,000,000 / 300,000 = 19,666.7 seconds / 60
= 327.8 minutes / 60
= 5.46 hours

John traveled in a Boeing 747 at 1,200 km/hr.  About how long will it take him to go around the Earth once?