Star Distances

Light year is a unit of _?_.

• time

• distance

• brightness

• heat

Which distance is larger: 1 astronomical unit or 1 light-year?

• 1 AU

• 1 LY

Tags

NGSS.MS-ESS1-3

If an object is 7.4 light years away from Earth, what does this tell you?

• It would take 7.4 minutes for the light to get to Earth.

• Traveling at the speed of light it takes 7.4 yrs to get to the earth.

• The object is very close to Earth.

• It would take 7.4 seconds for the light to get to earth.

Which is a longer distance: a parsec or a light year

• parsec

• light-year

• They are equal distances. Parsec is Latin for light-year.

Tags

NGSS.MS-ESS1-3

The distance light can travel in one year is ______________

• 15,000 kilometers

• 1 light-year

• 15 Astronomical Units

• 6,000 miles

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

• inches

• kilometers

• miles

• Astronomical units

What is the primary unit used to measure distances to stars?

• Parsec

• Kilometer

• Astronomical Unit

• Meter

Which of the following is approximately equal to 3.26 light-years?

• 1 Parsec

• 1 Astronomical Unit

• 1 Kilometer

• 1 Mile

If a star is 4.2 light-years away, how long does its light take to reach Earth?

• 4.2 seconds

• 4.2 minutes

• 4.2 years

• 4.2 hours

What is the closest star system to Earth?

• Alpha Centauri

• Sirius

• Betelgeuse

• Vega