Kepler’s Law

Eric Angatteacher

The Big Bang Theory ( universe)http://www.youtube.com/watch?v=gs-yWMuBNr4

Imbalance on Earth. More land and Less land.

Astronomical Unit ( AU )

AU is the average distance between the Earth and the Sun. Its value is 150 million kilometers or 93 million miles or 1 AU.

Milky Way Galaxy-our galaxy.

2.54 Million Light-years (Mly)Milky Way

Galaxy

AndromedaGalaxy

SPEED OF LIGHT: 299,792,458 meters per secondor186,000 miles per second

http://www.nasa.gov/mission_pages/hubble/science/milky-way-collide.html

The distance to the Andromeda Galaxy is 2.54 million light-yearshttp://www.universetoday.com/30716/distance-to-andromeda/#ixzz2sRagJdDS

Distance on Earth is measured in KILOMETERS(km) and MILES (mi).

Distance in the solar system is measured in ASTRONOMICAL UNITS (AU).

Distance in the Milky Way galaxy measured in LIGHTYEARS (ly).

Orbital Velocity

http://www.youtube.com/watch?v=gvSUPFZp7Yo

is how fast a planet travels as it orbits around the Sun.

Copy and answer the following questions.1.What is Kepler’s 1st Law?2. Kepler’s 2nd Law states that

planets sweep equal _______ in equal amount of _________.

3. What is the equation for Kepler’s 3rd Law?

4.What is Kepler’s 3rd Law?

http://www.youtube.com/watch?v=QsopVzjd2sU

What is Kepler’s 1st Law?

Planets have elliptical or oval orbits.

Kepler’s 2nd Law states that planets sweep equal _______ in equal amount of __________.

AreasTime

The area of thisIs equal to the area of this

They just have different shapes.

Kepler’s Second Law

http://astronomy.osu.edu/

Which dot is bigger?

A B

P is the orbital velocity (amount of time for a complete revolution.)

What is the equation for Kepler’s 3rd Law?

P2 = a3

a is the Astronomical Unit (AU).

Orbital Velocity

http://www.youtube.com/watch?v=gvSUPFZp7Yo

is how fast a planet travels as it orbits around a star.

Kepler’s 3rd Law compares the orbital velocities of planets. Planets near the Sun revolve faster while planets farther from the Sun revolves slower.

28 mi/secNearest to the Sun.

21 mi/sec18 mi/sec

15 mi/sec

8 mi/sec6 mi/sec4 mi/sec

3 mi/secFarthest from the Sun

5. Kepler’s 3rd Law can determine the _____________of a planet given its distance from the Sun.

a.orbital velocity or orbital periodb.length of a yearc.length of a dayd.degree of ellipse of the orbit

orbital velocity

6. The diagram below demonstrates Kepler’s _____ Law.

a.1st

b.2nd

c.3rd

d.4th

2nd

7. The diagram below demonstrates Kepler’s _____ Law.

a.1st

b.2nd

c.3rd

d.4th

1st

Elliptical orbit