Unit 7.1 How We Study Space

The first ancient astronomer to propose a heliocentric model of the Universe

• Hipparchus

• Kepler

• Brahe

• Aristarchus

A Danish nobleman who designed and built instruments for measuring stars and planets, his observations were very precise.

• Hipparchus

• Kepler

• Brahe

• Aristarchus

He was the first to catalog almost 850 stars according to their brightness.

• Hipparchus

• Kepler

• Brahe

• Aristarchus

He discovered the 3 laws of planetary motion.

• Hipparchus

• Kepler

• Brahe

• Aristarchus

He was the first to say the Earth is round.

• Aristotle

• Newton

• Eratosthenes

• Copernicus

He was the first to calculate the circumference of the Earth.

• Aristotle

• Newton

• Eratosthenes

• Copernicus

Proposed the now widely accepted heliocentric model of the solar system.

• Aristotle

• Newton

• Eratosthenes

• Copernicus

The apparent backward movement of the planets in the sky is known as

• heliocentric orbits

• retrograde motion

• celestial movement

The geocentric model of the universe has the _______ at its center.

• sun

• moon

• Earth

The heliocentric model of the universe has the _______ at its center.

• sun

• moon

• Earth