SPACE - objects, vocabulary, distances, luminosity

An astronomical unit is...

• The average distance between the Earth and the Sun

• The average distance between the Sun and Neptune

• The diameter of the sun

• The time it takes light to travel across our solar system

Astronomical units are used for

• Distances within a solar system

• Distances between stars

• Distances within galaxies

• Road Trips in the northwoods

The distance that light can travel in a year is called....

• 8 billion miles

• A leap year

• A light month

• A light year

A light year is approximately.....

• 60,000,000 kilometers

• 8.5 billion kilometers

• 9,500,000,000,000 kilometers

• 377,160,825,209,412,592 kilometers

_______________ would be the best unit to use to measure the distance between the Earth and Neptune

• Astronomical units

• Kilometers

• Light years

• inches

_____________ would be the best unit to measure the distance between stars in our galaxy

• Astronomical units

• Light seconds

• Light years

• feet

_______________ would be the best unit to use to measure the distance between the our sun and Proxima Centauri (our nearest star neighbor).

• Astronomical units

• Light seconds

• Light years

• miles

Which two objects in space are farthest apart from each other?

• Earth and Mars

• Earth and the Sun

• Earth and the Moon

• Milky Way galaxy and Andromeda galaxy

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.

• solar eclipse
• lunar eclipse