My wife made me go to the doctor

What is the term for the apparent size of an object as seen from a particular point?

• Angular size

• Parallax

• Ellipse

• Focus

Which shape best describes the orbits of planets according to Kepler's first law?

• Circle

• Ellipse

• Parabola

• Hyperbola

What is the name of the small circles that planets were once thought to move in, according to the geocentric model?

• Epicycles

• Ellipses

• Satellites

• Parallax

In an ellipse, what is the name given to the fixed points used to define the shape?

• Foci

• Apogee

• Perigee

• Axis

Which model places the Earth at the center of the universe?

• Heliocentric model

• Geocentric model

• Parallax model

• Satellite model

Who proposed the heliocentric model of the solar system?

• Ptolemy

• Copernicus

• Tycho

• Galileo

Which law states that the square of a planet’s orbital period is proportional to the cube of the semi-major axis of its orbit?

• Kepler's First Law

• Kepler's Second Law

• Kepler's Third Law

• Newton's Law

What is the apparent shift in position of a nearby star against the background of distant objects called?

• Parallax

• Retrograde motion

• Aphelion

• Perihelion

What term describes the time it takes for a planet to complete one orbit around the Sun?

• Period

• Apogee

• Focus

• Satellite

What is the term for the apparent backward motion of a planet as observed from Earth?

• Parallax

• Retrograde motion

• Aphelion

• Perihelion