One of the two fixed points of an ellipse that are used to trace the curve of the ellipse-they are the focal points

• Ellipse
• Focus
• Orbit
• Eccentricity

The path of an object that seems to go around and around another object in space.

• Orbit
• Acceleration
• Ellipse
• Eccentricity

An attractive force that pulls objects that have mass towards each other-the Earth pulls on us with it.

• Force
• Acceleration
• Gravity
• Orbit

A change in speed - either increasing or decreasing.

• Force
• Acceleration
• Gravity
• Orbit

An oval that is traced around 2 center points - making it longer or more oblong than other ovals

• Eccentricity
• Orbit
• Focus
• Ellipse

The measurement of an oval that shows how far off it is from being a perfect circle.

• Ellipse
• Eccentricity
• Focus
• Lightyear

The distance light can travel in 365 days

• Orbit
• Acceleration
• Lightyear
• Force

A push or pull that can change the motion of an object

• Force
• Gravity
• Acceleration
• Orbit

a unit of measurement equal to 149.6 million kilometers, the mean distance from the center of the earth to the center of the sun.

• Lightyear
• Orbit
• Force
• Astronomical Unit (AU)

What governs the motion of satellites, moons, planets, solar systems and galaxies?

• Laws of Motion
• Theory of Relativity
• Big Bang Theory
• Butterfly Theory