Astronomy

Why is the light from distant galaxies red-shifted?

• They produce more red light than nearby galaxies
• They are moving away from us
• The longer wavelengths are filtered out more by dust
• They are moving toward us

About how long ago do scientists believe the universe began?

• 13-14 billion years ago
• 13-14 million years ago
• 12-13 billion years ago
• 12-13 million years ago

What does the moon orbit around?

• Saturn 
• Neptune 
• Earth 
• Sun 

Which of the following pictures is showing a high tide?

• A
• B
• C
• D

What does the Big Bang theory suggest?

• The universe was just there
• The Milky Way is the only solar system
• The universe is continually expanding
• The universe started as a point and is moving towards each other

The spinning of the Earth on its axis is

• rotation
• revolution
• precession
• nutation

The motion where the Earth's axis tilt traces a cone pattern once every 26,000 years is called

• rotation
• revolution
• precession
• nutation

The center point of the orbits of two revolving objects is called the

• focus
• barycenter
• nutation
• ellipse

The Earth's motion around the Sun is called its

• rotation
• revolution
• precession
• nutation

The shape of the Earth's orbit around the Sun (really around its barycenter with the Sun) is a(n)

• circle
• cone
• ellipse
• figure-8