[arethuza]

According to this:

https://wattsupwiththat.com/2006/12/08/yottawatts/

Tsar Bomba - 5.3 YW

Sun - 386 YW

39 nanoseconds isn't very long (~39 light-feet).

[nannal]

~12 light-meters for our non-metrically challenge friends.

[arethuza]

I was using feet to emphasise I was being silly ;-)