Orbit and Planetary Motion Quiz

What is an orbit?

• A circular path around which a planet or satellite travels.

• A closed path around which a planet or satellite travels.

• A straight line path around which a planet or satellite travels.

• A random path around which a planet or satellite travels.

Who discovered that planet orbits form ellipses?

• Isaac Newton

• Albert Einstein

• Johannes Kepler

• Galileo Galilei

In what shape do satellites orbit Earth?

• Circle

• Square

• Ellipse

• Triangle

What remains constant in a circle?

• The sum of distances from two foci

• The distance from the center point

• The distance between two foci

• The area of the circle

What is 'c' in the context of an ellipse?

• ½ the major axis length

• ½ the minor axis length

• The distance from the center to a focal point

• The radius of the circle

In a circle, how are 'a' and 'b' related to the radius?

• a and b are equal to the radius

• a is twice the radius, b is half

• a is half the radius, b is twice

• a and b are unrelated to the radius

What additional component is included in the Keplerian element set besides the parameters?

• A time stamp

• A velocity vector

• A mass measurement

• A distance unit

What does eccentricity describe in an orbit?

• The color of the orbit

• The roundness of an orbit

• The speed of the orbit

• The temperature of the orbit

What is the formula for calculating eccentricity?

• e = √(1 + b²/a²)

• e = √(1 - b²/a²)

• e = √(a² - b²)

• e = a/b

What is the eccentricity of a circle?

• 0

• 0.5

• 1

• 2