# Kepler's Laws

About 50 years before Newton formulated the law of gravity, Johanne Kepler (1571-1630) had found some rules that could be used to calculate the orbits of the planets
👁 418
statistics
calculate
Questions #: 8
Time: 5 minutes
Pass Score: 80.0%
Style
Mode

#### Kepler's First Law

According to Kepler's first law, planets orbit the sun in the shape of an ________

POINTS (1)

#### Drawing ellipse

The easiest way to draw an ellipse is to put two tacks in a piece of paper and put a loose loop of a string around them, as shown in the figure below.

If the tacks are placed farther apart, how will the shape of the ellipse be changed?

POINTS (1)

#### Drawing a circle

The easiest way to draw an ellipse is to put two tacks in a piece of paper and put a loose loop of a string around them, as shown in the figure below.

What would the positions of the tacks have to be to draw a circle?

POINTS (1)

POINTS (1)

#### Kepler's second law

As a planet orbits the sun, a line from the planet to the sun sweeps across equal areas in equal times.

POINTS (1)

POINTS (1)

POINTS (1)

POINTS (1)