Gravity Basics
This force pulls objects toward each other.
What is gravity?
The largest object in our solar system.
What is the Sun?
A cloud of gas and dust where stars form.
What is a nebula?
The shape of a planet’s orbit.
What is an ellipse?
Huge collections of stars.
What are galaxies?
Gravity depends on these two things.
What are mass and distance?
The cloud of gas and dust that formed our solar system.
What is a nebula (solar nebula)?
The early stage of a star before it fully forms.
What is a protostar?
The Sun is located at this point in an orbit.
What is a focus?
The galaxy we live in.
What is the Milky Way?
Objects with more of this have stronger gravity.
What is mass?
Objects that formed before becoming full planets.
What are protoplanets?
The process that powers stars and releases energy.
What is nuclear fusion?
What would happen to a planet without gravity.
What is it would move in a straight line?
The three main types of galaxies.
What are spiral, elliptical, and irregular?
When objects are closer together, gravity becomes this.
What is stronger?
The Sun’s gravity keeps planets doing this.
What is orbiting the Sun?
What gravity does to gas and dust to begin star formation.
What is pulls/collapses it together?
Planets move faster when they are this to the Sun.
What is closer?
Groups of galaxies held together by gravity.
What are clusters?
The rule that explains how gravity works between all objects.
What is the law of universal gravitation?
Why Venus feels more gravity from the Sun than Earth does.
What is because it is closer to the Sun?
What must happen in a protostar’s core for it to become a star.
What is nuclear fusion must begin?
Planets farther from the Sun have longer what?
What is period of revolution (year)?
The galaxy expected to collide with the Milky Way.
What is the Andromeda Galaxy?