What is an ellipse?

• A circular shape that describes the path of an orbiting object.

• An oval shape that describes the path of an orbiting object, defined by a specific mathematical equation.

• A straight line that describes the path of an orbiting object.

• A polygon with four sides that describes the path of an orbiting object.

What is Orbital Precession?

• The sudden change in an object's orbit due to external forces.

• The slow, gradual rotation of an object's elliptical orbit itself over a long period of time.

• The acceleration of an object's speed as it approaches a gravitational field.

• The immediate alteration of an object's path in space.

What is the definition of 'Focus' in the context of an ellipse?

• A point where two lines intersect

• One of two fixed points inside an ellipse; the object being orbited is located at one focus.

• The center of a circle

• A term used to describe the clarity of an image

What is Orbital Resonance?

• A situation where orbiting bodies exert regular, periodic gravitational influence on each other due to related orbital periods.

• A phenomenon where celestial bodies collide with each other in space.

• A type of gravitational force that only affects planets in the same solar system.

• A method used to calculate the distance between stars.

What is an Astronomical Unit?

• A unit of time equal to the duration of one year

• A unit of distance equal to the average distance from Earth to the Sun, about 149.6 million kilometers.

• A unit of mass used to measure celestial bodies

• A unit of temperature used in astronomy

Semimajor axis

• Half of the longest diameter of an ellipse, representing the average distance of an orbiting body from its primary.

• The shortest distance from the center of an ellipse to its edge.

• The total distance around an ellipse, also known as the perimeter.

• The distance from the center of a circle to its edge.

Aphelion Noun

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[ap-hee-lee-uhn]

• The point in an object's orbit around the Sun where it is farthest from the Sun.

• The point in an object's orbit around the Sun where it is closest to the Sun.

• The point in an object's orbit where it has the highest speed.

• The point in an object's orbit where it has the lowest speed.

What is the definition of Orbital Period?

• The distance between two celestial bodies.

• The amount of time it takes for an object to complete one full orbit around another object.

• The speed at which an object travels in space.

• The gravitational force between two objects.

What is the semiminor axis?

• Half of the longest diameter of an ellipse

• Half of the shortest diameter of an ellipse, a line segment perpendicular to the semimajor axis

• A line segment that connects the foci of an ellipse

• The distance from the center of the ellipse to the edge along the longest axis

What is the Kuiper Belt?

• A disc-shaped region of icy bodies, including dwarf planets, located beyond the orbit of Neptune.

• A region of gas giants located between Mars and Jupiter.

• A collection of asteroids found in the inner solar system.

• A cluster of stars located in the Milky Way.