[lexington minuteman 1775]

Uh...what level of Sun protection do we need if a super nova goes off that close?Guess I better see if I have insurance coverage as well.

[Salgak]

The problem with being within a couple of hundred light years of a Supernova, is that you're in range of a VERY significant initial gamma radiation pulse. Sufficient to sterilize a planet. And following the initial pulse, high-speed gases, moving at significant fractions of the speed of light. Just the thing to rip the atmosphere off of a seared planet.

[Doctor Stochastic]

SPF 45,000,000,000,000 may suffice.

[Stand Watch Listen]

SPF 1000²⁵ should do it