The Size of Space

Which unit of measurement is used to measure distances within our solar system?

• inches

• kilometers

• miles

• Astronomical units

T or F: Meters and kilometers are the preferred measurement for distances within the solar system.

• True

• False

What unit of measurement is used to measure distances like those in our Local Group?

• astronomical units

• kilometers

• light years

• parsecs

Which unit of measure would be used to measure the distance from our solar system to the center of the MIlky Way?

• pc

• ly

• AU

• km

Which is the largest unit of measure?

• pc

• ly

• AU

• km

Which unit of measure would be used to measure the distance from one galaxy to another?

• pc

• ly

• AU

• km

Scientists use the light-year to describe the relationships between objects in space. What does a light-year measure?

• the distance that light can travel in one year

• the brightness of light that travels through space

• the number of years it takes light to travel to Earth

• the time it takes light to travel 1 million km

Which unit of measure would be used to measure the diameter of the Andromeda Galaxy?

• pc

• ly

• AU

• km

Which unit of measure would be used to measure the distance from our Sun to Mars?

• pc

• ly

• AU

• km

Which unit of measure is based on the distance light travels in a year?

• pc

• ly

• AU

• km