Physical Laws
The force of attraction between objects.
What is Gravity?
This category for stars is based on the amount of light it produces.
What is Brightness?
This is the stage our Sun is currently in.
What is Main Sequence?
This man believed that heavier objects fell faster than lighter ones, because they contained more earth element.
Who is Aristotle?
The property of matter to remain at rest or in motion.
What is Inertia?
This category of stars is based on the type of light produced by a star.
What is Color?
The stage that comes after the Main Sequence, where a star's radius expands to many times its size.
What is a Red Giant?
This man found that objects, no matter how heavy, fall to the ground at the same speed.
Who is Galileo?
The two properties that determine the strength of gravity.
What is Mass and Distance?
This property determines the type of light the star produces.
What is Surface Temperature?
The resulting explosion from the collapse of an iron core.
What is a Supernova?
This man found put forth the Law of Universal Gravitation.
Who is Isaac Newton?
The shape of the orbits of the planets around the Sun.
What is an Ellipses?
This categorization of stars is expressed in multiples of the radius of the Sun.
What is Size?
The number of solar masses needed to produce a black hole after supernova.
What is 3 Solar Masses?
This man found that the celestial orbits are not perfect circles, but a different shape.
Who is Kepler?
The type of reaction that fuels stars.
What is Nuclear Fusion?
This categorization determines the gravitational pull of a star, but not necessarily its size.
What is Mass?
A teaspoon of material from this object is so massive that it would weigh billions of tons on Earth.
What is a Neutron Star?
Isaac Newton published this book in 1687.