Unit 1: Kepler's Laws

Which scientist came up up with the three laws of planetary motion?

• Newton

• Kepler

• Einstein

• Hawking

The path a planet travels around the sun is called its 

• orbit
• ellipse
• barycenter
• precession

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Which Law is it?

This Law states that a planets path around the sun is elliptical.

• Kepler's 1st Law

• Kepler's 2nd Law

• Kepler's 3rd Law

Tags

NGSS.MS-ESS1-2

Kepler's 2nd Law deals with 

• the shape of the planets' orbits
• the speed/area the planet travels 
• the length of time it takes the planet to orbit the sun

The point in a planets orbit where it is FARTHEST away from the sun

• aphelion
• perihelion

The point in a planets orbit where it is CLOSEST to the sun

• aphelion
• perihelion

Kepler's 3rd Law states that the farther away a planet is from the sun, the _______ it takes it to orbit the sun once (year).

• longer

• shorter

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

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

A perfect circle has an eccentricity of ______.

• 0
• .99
• 1
• 2

Which diagram shows a planet with the least eccentric orbit?

• 1
• 2
• 3
• 4