Astronomy 18.1

Used large tools to measure the positions of planets and stars

• Galileo

• Brahe

• Newton

• Hubble

This person was the first to use a telescope to make observations in the sky -

• Aristotle
• Ptolemy
• Copernicus
• Galileo

Developed a theory of an Earth-centered universe in 140 CE

• Galileo
• Ptolemy
• Copernicus
• Aristotle

Using Tycho’s Brahe's data, found elliptical orbits of planets.

• Kepler
• Ptolemy
• Copernicus
• Aristotle

Began a new era of astronomy when he concluded that the Sun was the center of the universe

• Aristotle
• Isaac Newton
• Claudius Ptolemy
• Nicolaus Copernicus

He proved the existence of galaxies other than the Milky Way

• Hubble
• Newton
• Brahe
• Kepler

Showed that planets and moons stay in orbit due to gravity

• Newton
• Hubble
• Copernicus
• Ptolemy

How long does it take for the Earth to make one full orbit around the Sun?

• one day
• one week
• one month
• one year

When the Earth completes a full orbit around the Sun, it has completed _____ rotations or days

• 7
• 30
• 91
• 365

The spinning movement of the Earth about its axis is called the Earth's _____

• revolution
• rotation
• precession
• orbit