Planets
This planet has the speediest orbit.
What is Mercury?
This is the visible part of the sun.
What is the corona?
An object that revolves around another object.
What is a satellite?
This astronomer helped prove the heliocentric view when he used a telescope he made to discover moons orbitting Jupiter.
Who is Galileo Galilei?
The force of attraction that exists between two objects.
What is gravity?
This planet is nicknamed the "evening star" and the "morning star."
What is Venus?
An imaginary giant, hollow ball with earth at center and sun, moon, stars, and other planets on its inner surface.
This is the largest known mountain in the solar system.
What is Olympus Mons?
This astronomer discovered the law of universal gravitation.
Who is Galileo Galilei?
The name for a model of the solar system with the earth at the center.
What is geocentric?
What is Jupiter?
Apparent magnitude of a star is based on these two things.
What are actual brightness and distance from earth?
This is the fastest rotating planet in our solar system.
What is Jupiter?
Who is Nicolaus Copernicus?
An invisible line separating the visible portion of the celestial sphere from the part we cannot see.
What is the horizon?
This inner planet has retrograde or backwards rotation.
What is Venus?
Scientists believe hydrogen is being fused into this in the core of the sun.
What is helium?
The moon's dark patches are referred to as these.
What are maria?
This astronomer discovered that planets do not travel in perfect circles.
Who is Johannes Kepler?
It was once suggested that planets move in these small circular patterns as they orbit.
What are epicycles?
This planet has 274 moons, including Titan.
What is Saturn?
The sun is considered an average or "_________________" star.
What is main-sequence?
The planets in order from the sun.
What are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune?
This astronomer suggested epicycles as a solution to a problem posed by the geocentric model.
Who is Ptolemy?
The name for the distance between the earth and the sun.
What is an astronomical unit?