I also like that they say they hope it might survive long enough to be entombed in space while still ignoring the fact that the gamma radiation is going to be with the UV radiation and will screw up the reaction long before the chemical even forms. What kind of direct exposed surface in space has only UV radiation with no gamma or x-rays.

I think they forgot the whole gamma radiation bit. Last time I checked NASA said this is how they know they are not seeding mars with life because space radiation is so high energy that it sterilizes the entire spacecraft (Also a bit dubious but in space you will quickly get many many Sv of radiation which in a very short period of time is enough radiation to completely kill anything living or even organic in nature). So I'm not seeing how you get UV light into a very very thick lead alternating with a soft absorber and then more lead shielded ball needed to keep the organic chemicals from denaturing under even higher ionizing radiation exposure for millions of years. The probability you would get viable biological chemicals from space is zero. The longer your in space the more radiation you'll get. Only an atmosphere and magnetic field of a planet would provide enough shielding.