Lecture 2

What is the favored theory for the formation of the Universe?

• The Big Bang Theory

• The Steady State Theory

• The Ptolemaic Theory

• The Geocentric Theory

Where does the light we see from Galaxies come from?

• Planets

• Black Holes

• Nebulas

• Stars

What is a planet?

• A moderately large object that orbits a star

• A small rocky body that orbits a star

• A gaseous object that orbits a star

• A moon that orbits a planet

What is the age of the Universe?

• 14 million years

• 14 billion years

• 14 trillion years

• 14 quadrillion years

Where are most of the elements made?

• In black holes

• In nebulae

• In galaxies

• In stars

What is the unit used to measure the distance light can travel in one year?

• Light-meter

• Light-kilometer

• Light-mile

• Light-year

What is the unit used to measure the orbital radius of Earth around the Sun?

• Astronomical Unit (AU)

• Light-year

• Solar Radius

• Jupiter Radius

What is the approximate distance to the nearest stars?

• 100 AU

• 1,000 AU

• 10,000 AU

• 100,000 AU

What is the approximate distance to the nearest galaxy (Andromeda)?

• 10 light years

• 100 light years

• 1,000 light years

• 2,500,000 light years

What is the diameter of the Milky Way Galaxy?

• 10,000 light years

• 50,000 light years

• 100,000 light years

• 500,000 light years