undefined | Better HN

0 pointspdonis9y ago0 comments

> Going to M31 would probably take at least 10M years at 60mph.

This is a drastic underestimate. Going to M31 would take about 10M years at one-fifth the speed of light (since M31 is about 2M light years away). One-fifth the speed of light is 37,256 miles per second, or about 134 million miles per hour. So at 60 mph, it would take about 2 million times longer, or about 20 trillion years.

0 comments

1 comments · 1 top-level

yeukhon9y ago

Thanks. I think I did the calculation wrong.

j / k navigate · click thread line to collapse