# Speed of Sunset

Discussion in 'Earth Science' started by Novar, Sep 1, 2003.

1. ### NovarRegistered Member

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If you could travel nonstop west around the globe how fast would you have to travel to constantly see a sunset?

3. ### cosmictravelerBe kind to yourself always.Valued Senior Member

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33,264
Circumference of the earth is 25,000 miles at the equator so as you go higher or lower in latitude that size decreases. It depends on where you start your journey from on Earth as to how long it takes. If you were standing on the North Pole or South Pole the sun would never set!

5. ### MRC_HansSkepticRegistered Senior Member

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So at the equator, you would need to go a little over 1000mph. That is about MACH 1.6, quite within the abilities of a modern jet fighter, or the soon to be scrapped Concorde (which flies more than MACH 2).

Hans

7. ### hotmailRegistered Member

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so wait, u know how the time difference between adelaide and melbourne is half an hour, so how can we figure out the speed of the sunset using that, i need the distance horizontally between ade and melbourne dont i?

8. ### valichRegistered Senior Member

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3,501
If the circumference of the earth is 25,000 miles and the earth completes a rotation in 24 hours then 25,000 divided by 24 is 1041.67 miles per hour. Then this is how fast you would have to go to keep up with the earth's rotation and "constantly see the sunset."