Chapter 22 Origin of Modern Astronomy

What is the geocentric model of the solar system?

• a model where the sun is the center of our solar system

• a model where the moon is the center of the solar system

• a model where the Earth is the center of the solar system

• a model where Jupiter is the center of the solar system

What is the heliocentric model of the solar system?

• a model where the sun is the center of our solar system

• a model where the moon is the center of the solar system

• a model where the Earth is the center of the solar system

• a model where Jupiter is the center of the solar system

What is retrograde motion as related to planets?

• It is the rotation of the asteroid belt around the sun

• It is the movement of Mercury around the sun

• It is the movement of the moon around the Earth

• It is the apparent backward movement of planets in the sky

What planets were known to the early Greek astronomers?

• Mercury, Venus, Mars, Jupiter and Saturn

• Mercury, Venus, Jupiter, Saturn and Neptune

• Jupiter, Saturn, Neptune, Uranus, and Pluto

• Venus, Mars, Jupiter, Saturn and Neptune

What is the shape of a planet's orbital path around the sun?

• a perfect circle

• an elipse

• a hexagon

• a rectangle

What is the point of a planet's orbit when it is farthest from the sun?

• aphelion

• perihelion

What is the point of a planet's orbit when it is closest to the sun?

• aphelion

• perihelion

When a planet is turning on it's axis, the movement is called

• rotation

• revolution

• precession

When a planet is moving about the sun, the movement is called

• rotation

• revolution

• precession

When a planet is wobbling on it's axis, the movement is called

• rotation

• revolution

• precession