A greek astronomer who developed the geocentric model of the universe.
Who is Ptolemy
100
The study of the universe
What is astronomy
200
The four planets closest to the sun, are close together and are closest to the sun.
What are the inner planets or What are Mercury, Venus, Earth and Mars.
200
A device used to measure the properties of light.
What is a spectroscope?
200
A chunk of rock or dust scattered throughout space.
What is a meteoroid?
200
Developed the law of gravity which explains why planets orbit the Sun.
Who is Sir Isaac Newton?
200
The scientific law that states that an object in motion tends to stay in motion and an object at rest tends to stay at rest unless acted upon by an outside force.
What is inertia.
300
The smallest planet.
What is Mercury?
300
A type of galaxy that is mostly round and is packed with mostly old stars.
What is an elliptical galaxy?
300
A streak of light in the sky produced by the burning of a meteoroid that has entered Earth's atmosphere. Also called a "shooting star."
What is a meteor.
300
First astronomer to use a telescope to study space.
Who is Galileo?
300
A model of the universe where the Earth is the center of the universe and everything else revolves around the Earth.
What is the geocentric model?
400
Four planets furthest from the sun and very far apart.
What are the outer planets or What are Jupiter, Saturn, Uranus and Neptune.
400
The name and shape of the galaxy that Earth is in.
What is a spiral galaxy called the Milky Way.
400
Small, rocky items revolving around the Sun that are too small to be considered a planet.
What are asteroids.
400
Astronomer who developed the heliocentric model of the universe.
Who Copernicus?
400
The scientific law that states that all objects in the universe attract each other through this force.
What is gravity?
500
The hottest planet.
What is Venus.
500
Type of galaxy that has no defined shape and contains mostly young stars with a lot of gas and dust.
What is an irregular galaxy?
500
A ball of ice and dust whose orbit is a long narrow ellipse. Has a nucleus, coma and tail.
What is a comet?
500
Developed three laws that determine planetary revolution. These are still used today.
Who is Kepler?
500
Model of the universe where the sun is the center of the solar system and the eight planets revolve around the sun.