The big bang theory states that the Universe was created

cosmology is the study of

A light year is

the distance from Earth to the sun is closest to

a spiral group of stars is approximately 100 000 light years in diameter. It is probably a

The sun is

Many objects in space produce different types of electromagnetic radiation. There are two that can get through the atmosphere- they are

The telescope in Parkes in western NSW that was used to receive picture and sound signals in the moon landings is an example of a

The Chandra x ray telescope is

Since the big bang, the Universe has been

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