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1 lightyear is about 9.5 million km.

Not true. 1 lightyear is about 9.5 x 10^12 km. that is 9.5 TRILLION km

I'll show you why: light moves at 3 x 10^8 m/s. meaning every second it will travel 300 thousand km. now there are 31 556 926 seconds in a year. So, 300 000 x 31 556 926 = 9.467 x 10^12 km

new answer;

9.46 trillion

I get 9,460,730,472,581 km

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13y ago

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