A light-year is

The speed of light is

An AU is

The Universe is defined as

Choose the correct answer that places objects from smallest to largest

Scientists use this shorthand method to write extremely large or extremely small numbers.

Choose the answer that correctly shows objects from closest to farthest away from us.

The Pleiades is an example of this type of Star Cluster

This type of star cluster has loose, disorganized appearance and no more than a few thousand stars.

This type of star cluster are round and densely packed older stars and some contain more than a million stars.

All of the stars in a particular cluster formed

The age of our sun is approximately

What is the approximate age of the universe?

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