Would the movie Sunshine to some extent count as cosmic horror? While it might not be horror in the usual sense because it's not meant to be directly scary, the plot focuses on the overall insignificance of humanity compared to the dying sun and a final desperate attempt to do something so that they survive just a bit longer, with several characters in the movie and especially the latter half of it involving obsession, near-worship and insanity because of the power of sun, even resulting in some inexplainable and somewhat supernatural events occurring in relation to it.