A Quiz for Astronomers – Question Three

Please study the Virgin Galactic network map [below] which clearly displays a straight line route between Arcturus and Planet Earth.

All spaceships on the straight line route [between Arcturus and Planet Earth] may stop at any of the intervening space stations so that passengers may board or leave the spaceship.

The distance between Arcturus and Planet Earth is approximately 36.7 light years.

A recent survey produced a colour coded graphic indicating how many passengers arrived at Planet Earth on the last Virgin Galactic spaceship from Arcturus.

A black rectangle in the graphic represents an empty seat on the spaceship when it arrived at Planet Earth. The coloured rectangles represent passengers who arrived at Planet Earth on the spaceship.

Question 3a)

Can you calculate how many passengers boarded the spaceship at Arcturus?

Question 3b)

Can you calculate how many passengers left the spaceship before it arrived at Planet Earth?

Question 3c)

Can you calculate how many passengers boarded the spaceship after it left Arcturus?

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1 Response to A Quiz for Astronomers – Question Three

1. geran says:

This is obviously easy to answer, as the “red shift” of the “recent survey” indicates we have traveled so far into the future that we are back in time. So, the spaceship got here before it left there, and the passengers got off before they got on. Therefore, all we need to do is multiply by the Hubble Constant.

3a) 3.14159
3b) .0000000567
3c) 299,000,000

(Just helping out the astronomers….)

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