Ozone is a free radical of oxygen. Regular oxygen is O2, Ozone is O3. To make ozone you subject regular oxygen to UV light. Let’s see, are there any stars near the Earth that emit light in the UV spectrum?
I deserve a governement grant, dammit!
No, it's not. O3 is an allotrope: an alternative metastable form of oxygen. Typically because it's less energetically favorable than O2 under low-atmospheric conditions, it breaks down into O2, and there are some reactions which can cause it to break down into allotropic free radicals; but O3 itself is an ordinary molecule, not a free radical.