WorksheetsAstronomers
Total questions: 26
Worksheet time: 13mins
Ancient Greeks believed, the earth to be the centre of the universe. What do we call this model?
Copernican Model
Geocentric Universe
Heliocentric Universe
Around 300 BC this person determined the relative sizes of Earth, Moon, And Sun. Believed in heliocentricity.
Aristarchus
Eratosthenes
Ptolemy
Tycho Brahe
Around 140 BC this person popularized the geocentric theory in his work Almagest.
Aristarchus
Eratosthenes
Ptolemy
Tycho Brahe
1543 this person publishes De revolutionibus and introduces heliocentric theory (again).
Aristarchus
Ptolemy
Tycho Brahe
Nicolaus Copernicus
Who is most associated with this model of our solar system. Look carefully!
Aristarchus
Ptolemy
Tycho Brahe
Nicolas Copernicus
Developed the first telescope in 1608
Lippershey
Gallileo
Copernicus
Brahe
Observed Titan and rings of Saturn.
Brahe
Galileo
Huygens
Cassini
Developed the 3 laws of planetary motion.
Kepler
Newton
Copernicus
Galilleo
Discovered Uranus
Giovanni Cassini
Christiaan Huygens
William Herschel
Johann Gottfried Galle
The backward loops/motion of the planets is called ________.
loop motion
retrograde motion
Copernican motion
Newtonian Motion
Almost every ancient society had a ____ or observatory to predict celestial events.
clock
telescope
person
calendar
There were ____ known planets at the time of the ancient Greeks.
5
4
2
9
When observing retrograde motion, such as observing Mars from Earth, Mars is travelling _____ than Earth.
slower
faster
The circle around the earth in which a celestial body or the center of the epicycle of its orbit was thought to move is called the
epicycle
epicenter
deferent
ellipse
