Light Years and AU's (Astronomical Units)

What is Astronomical Unit?

• The average distance between the Sun and the Moon

• The average distance between Neptune and the Sun

• The average distance between Earth and the Sun

• The average distance between Earth and Moon

Tags

NGSS.HS-ESS1-4

What is Light Year?

• The distance travelled by light in a second

• The distance travelled by light in a minute

• The distance travelled by light in a year

• The distance travelled by light in a decade

Light Years are a measure of:

• time
• speed
• distance
• light

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

• 1 AU

• 1 LY

What is the time taken for the light to travel between the Sun and Earth?

• 2 minutes

• 4 minutes

• 8 minutes

• 12 minutes

Tags

NGSS.HS-PS4-1

Why do we use light years and astronomical units to measure distances in space?

• Scientists want to sound smart.

• Hubble discovered these units and wanted to use them.

• Space is too small to use km, it wouldn't make sense.

• Space is too big, vast, enormous to use traditional units, like miles or kilometres.

A light year is the 

• distance that light travels in one year
• Speed at which light travels 
• Distance between the sun and the earth. 
• Distance at which light no longer exists. 

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.

A.U. (astronomical units) are used to measure distances between _?_.

• stars

• planets

• galaxies

• solar systems

Tags

NGSS.MS-ESS1-3

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

• ft

• ly

• AU

• km