Outer Space..........................................3 Three Laws of Motion...........................14

Earth......................................................4 Navigation..............................................15

The Size of the Earth............................5 Cartography...........................................16

How does the earth move in space...6 Electronics..............................................17

Geocentic View.....................................7 Ship Building..........................................19

Galileo....................................................8 Cites Sources..........................................21

Heliocentric View..................................9

Kepler.....................................................11

Three Laws of Planetary Motion.........12

Newton...................................................13

Table of Contents

In our solar system we have 8 planets, one star, 5 dwarf planets, and more than 150 moons.

Outer Space

Earth

We live on a planet called earth. It is the third planet from the sun.

The earth is not a perfect circle. So instead its shape is an oblate spheroid.

The size of the earth

The radius of the earth is almost 4000 miles!

While the diameter is almost 8000 miles!

How does the earth move in space?

The earth is tilted on its axis while it spins and moves. That is how we have seasons

It takes about 365 days for our earth to rotate around the sun. It also takes about 24 hours to complete a rotation on its axis

The geocentric view is where the sun and the planets orbit the earth

Geocentric View

Galileo

Galileo Galilei was an Italian astronomer. He was born in 1564 and died in 1642.

Heliocentric View

Galileo created the heliocentric view. He published a book about it in 1632.

The heliocentric view is where the planets orbit around the sun

Kepler

Johannes Kepler was a German astronomer. He was born in 1571 and died in 1630.

Three Laws of Planetary Motion

Kepler created the Laws of Planetary Motion.

Newton

Isaac Newton was an English mathematician along with a astronomer and many other things.