How long would a trip around UY Scuti’s circumference take if the traveler moved at the speed of light?
Answer
Roughly 6.88 hours
To establish a contrast with terrestrial travel speeds, the time required using the universal speed limit—the speed of light—is calculated. Light travels at approximately $300,000$ kilometers per second. Dividing the estimated circumference ($7.43$ billion km) by the speed of light results in a time of roughly $24,767$ seconds. Converting this duration into a more relatable unit yields approximately $6.88$ hours. This stark difference, comparing under seven hours for light versus over 900 years for a jet, dramatically illustrates the immense distances involved in interstellar scales.
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