Deck 11 = Universe and Orbits Flashcards

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1
Q

What is a Galaxy?

A

A large Collection of Stars.

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2
Q

What is the Universe?

A

Large collection of Billions of Galaxies.

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3
Q

What does Gravity do?

A

Gravity provides the Force that causes Orbits.

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4
Q

What orbits exists in a solar system?

A

Moons orbit planets,
planets orbit stars,
Comets orbits the stars,
Satellites orbit earth,

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5
Q

What is an elliptical orbit?

A

Elongated, Comets often have elliptical orbits. They slow down when traveling away from the star and speed up when traveling towards the star.

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6
Q

Equation for Speed?

A

Speed = Distance / Time

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7
Q

Orbital Speed?

A

2 x pie x Orbital Radius / Time Period.

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