Important People
Important People/Planet Studies
Space Objects/Planets
Planets 1
Planets 2
100
This individual predicted a comet later named in his honor.
Who is Halley?
100
This individual formulated the three laws of planetary motion.
Who is Kepler?
100
The scientific name for shooting star.
What is meteor?
100
The largest planet in our solar system.
What is Jupiter?
100
When a planet appears to stop and then move backward against the stars in the background.
What is retrograde motion?
200
This individual introduced the heliocentric model.
Who is Copernicus?
200
The study of planets, stars, and heavenly bodies.
What is Astronomy?
200
This planet is brighter than all other planets.
What is Venus?
200
The fastest revolving planet.
What is Mercury?
200
Planets that are similar to the earth in density and size.
What are terrestrial planets?
300
This individual applied gravity to planetary motion.
Who is Newton?
300
The belief that planets, stars, and heavenly bodies affect people and events on earth.
What is Astrology?
300
Between these two planets you will find the main asteroid belt.
What is Mars and Jupiter?
300
Another name for the gas giants.
What are Jovian planets?
300
Pluto's orbit sometimes come inside this planets orbit.
What is Neptune?
400
This individual was persecuted for criticizing the geocentric model.
Who is Galileo?
400
This individual discovered four moons of Jupiter in 1610.
Who is Galileo?
400
Moons, along with anything else in the solar system that isn't a planet or dwarf planet.
What is a Small Solar System Body?
400
The planets that are further from the sun than the earth.
What is superior?
400
These two planets were predicted to exist before they were discovered.
What is Neptune and Pluto?
500
This individual proposed deferents and epicycles.
Who is Ptolemy?
500
This individual combined geocentric and heliocentric models.
Who is Tycho?
500
Comets that reappear at regular, predictable intervals.
What is periodic comets?
500
These are two factors Newton said kept the planets moving in their orbits.
What is orbital speed and gravity?
500
The part in a planets orbit where they move faster and are closest to the sun.
What is perihelion?
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