Question 1

On a scale where the Sun is about the size of a grapefruit and the Earth is about 15 meters away,how far away are the nearest stars besides the Sun?

Accepted Answer

A) 100 meters 
B) about the distance across 50 football fields 
C) about the distance across the state of Delaware 
D) about the distance across the United States 
A) 100 meters 
B) about the distance across 50 football fields 
C) about the distance across the state of Delaware 
D) about the distance across the United States

Question 2

Astronomers infer that the universe is expanding because distant galaxies all appear to

Accepted Answer

A) be growing in size. 
B) be moving away from us,with more distant ones moving faster. 
C) be made mostly of dark matter. 
D) rotate rapidly. 
A) be growing in size. 
B) be moving away from us,with more distant ones moving faster. 
C) be made mostly of dark matter. 
D) rotate rapidly.

Question 3

The total number of stars in the observable universe is about

Accepted Answer

A) 100 billion. 
B) the same as the number of grains of sand in a school sandbox. 
C) the same as the number of grains of sand on all the beaches on Earth. 
D) the same as the number of atoms that make up the Earth. 
A) 100 billion. 
B) the same as the number of grains of sand in a school sandbox. 
C) the same as the number of grains of sand on all the beaches on Earth. 
D) the same as the number of atoms that make up the Earth.

Question 4

The distribution of the mass of the Milky Way Galaxy is determined by

Accepted Answer

A) counting the number of stars. 
B) determining the amount of gas and dust. 
C) studying how stars are distributed in the Milky Way. 
D) studying the rotation of the galaxy. 
E) weighing various parts of the Milky Way. 
A) counting the number of stars. 
B) determining the amount of gas and dust. 
C) studying how stars are distributed in the Milky Way. 
D) studying the rotation of the galaxy. 
E) weighing various parts of the Milky Way.

Question 5

What is an astronomical unit?

Accepted Answer

A) the average speed of Earth around the Sun 
B) the length of time it takes Earth to revolve around the Sun 
C) the average distance from Earth to the Sun 
D) the diameter of Earth's orbit around the Sun 
E) any basic unit used in astronomy 
A) the average speed of Earth around the Sun 
B) the length of time it takes Earth to revolve around the Sun 
C) the average distance from Earth to the Sun 
D) the diameter of Earth's orbit around the Sun 
E) any basic unit used in astronomy

On a scale where the Sun is about the size of a grapefruit and the Earth is about 15 meters away,how far away are the nearest stars besides the Sun?

Astronomers infer that the universe is expanding because distant galaxies all appear to

The total number of stars in the observable universe is about

The distribution of the mass of the Milky Way Galaxy is determined by

What is an astronomical unit?

Discovering the Universe for Yourself

The Science of Astronomy

Making Sense of the Universe: Understanding Motion, Energy, and Gravity

Light and Matter: Reading Messages from the Cosmos

Telescopes: Portals of Discovery

Our Planetary System

Formation of the Solar System

Planetary Geology: Earth and the Other Terrestrial Worlds

Planetary Atmospheres: Earth and the Other Terrestrial Worlds

Jovian Planet Systems

Asteroids, Comets, and Dwarf Planets: Their Nature, Orbits, and Impacts

Other Planetary Systems: The New Science of Distant Worlds

Our Star

Surveying the Stars

Star Birth

Star Stuff

The Bizarre Stellar Graveyard

Our Galaxy

Galaxies and the Foundations of Modern Cosmology

Galaxy Evolution

The Birth of the Universe

Dark Matter, Dark Energy, and the Fate of the Universe

Life in the Universe

Celestial Timekeeping and Navigation

Space and Time

Spacetime and Gravity

Building Blocks of the Universe

Filters

Exam 1: A Modern View of the Universe

On a scale where the Sun is about the size of a grapefruit and the Earth is about 15 meters away,how far away are the nearest stars besides the Sun?

Astronomers infer that the universe is expanding because distant galaxies all appear to

The total number of stars in the observable universe is about

The distribution of the mass of the Milky Way Galaxy is determined by

What is an astronomical unit?

Discovering the Universe for Yourself

The Science of Astronomy

Making Sense of the Universe: Understanding Motion, Energy, and Gravity

Light and Matter: Reading Messages from the Cosmos

Telescopes: Portals of Discovery

Our Planetary System

Formation of the Solar System

Planetary Geology: Earth and the Other Terrestrial Worlds

Planetary Atmospheres: Earth and the Other Terrestrial Worlds

Jovian Planet Systems

Asteroids, Comets, and Dwarf Planets: Their Nature, Orbits, and Impacts

Other Planetary Systems: The New Science of Distant Worlds

Our Star

Surveying the Stars

Star Birth

Star Stuff

The Bizarre Stellar Graveyard

Our Galaxy

Galaxies and the Foundations of Modern Cosmology

Galaxy Evolution

The Birth of the Universe

Dark Matter, Dark Energy, and the Fate of the Universe

Life in the Universe

Celestial Timekeeping and Navigation

Space and Time

Spacetime and Gravity

Building Blocks of the Universe

Filters