The Loneliest Astronauts via Agreeable Comics
Astronauts Dan and Steve are stuck in a distant alien solar system, the last survivors of a mission that went horribly wrong and left the rest of their ten-strong crew dead. They’re light years from home on an airless moon, living on carefully-rationed supplies, and unable to contact Earth. The worst part of all this? They hate each other’s guts.
I don't know how I hadn't heard of Kevin Church and Doyle's darkly funny web comic until tonight. I just spent the past hour reading it and can't get enough.