____________ According to currently available evidence. Approximately how old is

Question

____________ According to currently available evidence. Approximately how old is the universe (to the nearest 1/2 billion years? Write your answer on the line provided. In our planetary system, Earth occupies a uniquely important orbital distance from the sun. This zone is the habitable zone; all stars have this zone, but not stars all have planets orbiting within this zone. What physical characteristic defines the habitable zone from other orbital distances around stars? __________ The orientation of parallel and meridians on the globe are based upon the location of the poles. Upon what is the location of the poles based? Write your answer on ine provided.

Explanation / Answer

3) 13.7 billion years old

According to the big bang theory the universe is 13.7 billion years old

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