Size and Distance in Space

Front

What does a light-year measure?

Back

the distance that light can travel in one year

Front

Which of the following units is most similar to the light-year? gram, second, kilometer, degrees Celsius

Back

kilometer

Front

Distances between objects in space can be enormous. Which of the following distances is the longest? 2.1 ly, 950,000 km, 9.5 trillion km, 1 million ly

Back

9.5 trillion km

Front

A light-year (ly) is the distance that light travels in one year. If a star is 3 ly from Earth, how long does it take light from that star to reach Earth?

Back

3 y

Front

Why do the sun and moon appear to be the same size when viewed from Earth?

Back

The moon is much closer to Earth than the sun.

Front

Which two objects in space are located farthest apart? Options: Earth and Mars, Earth and the sun, Earth and the moon, the Milky Way galaxy and the Andromeda galaxy

Back

the Milky Way galaxy and the Andromeda galaxy

Front

Space exploration has advanced our knowledge of the universe. Which space journey would take the longest? a journey from Earth to the sun, a journey from Earth to the moon, a journey from Earth to a star in the constellation Centaurus, a journey from Earth to the farthest planet in our solar system, Neptune

Back

a journey from Earth to a star in the constellation Centaurus

Front

Which object is closest to Earth? Options: Barnard’s Star, Planet Neptune, Andromeda galaxy, Triangulum galaxy

Back

Planet Neptune