Kepler and Big Bang

Planets orbit the Sun in a shape called a(n)

• circle
• ellipse
• focus
• perihelion

An ellipse is drawn around two points called

• aphelion
• perihelion
• foci
• axis

When a planet orbits the Sun, one of the foci of the elliptical orbit is 

• the axis
• the perihelion
• the center
• the Sun

The place where a planet is closest to the Sun as it orbits the Sun is called the

• perihelion
• aphelion

The place where a planet is farthest away from the Sun in its orbit around the Sun is called the

• aphelion
• perihelion

Where is the planet moving faster

• Position A to B
• Position B to C
• Position H to I
• Position I to J

What has an eccentricity of zero

• a straight line
• a large ellipse
• a circle
• a small ellipse

A planet moves __________ when it is farthest from the sun.

• faster
• slower

Kepler's first law states that the orbits of the planets are oval in shape or 

• ellipses
• perfect circles

The farther away a planet is from the sun, the _______ it takes it to orbit the sun once. 

• longer
• shorter