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A light year is the distance traveled by light in one year. Multiply light years by 9,460,730,472,580,800 (approximately 9.5 trillion or 9.46 x 10**12) to get kilometers. Other values sometimes seen are the result of rounding errors in the speed of light, or in how to define a "year". Scientists tend to use "parsecs" rather than light-years; light years are used more in popular science publications.

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How much would 280 mph converted in km be?

280 mph = 450.6 kph


When did the dinosaurs became extingt?

Dinosaurs became extinct around 65 million years ago during the Cretaceous-Paleogene extinction event. It is believed that a combination of climate change, asteroid impact, and volcanic activity contributed to their extinction.


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