Dear reader, C is also for the Curiosity Rover. You can follow it on Twitter.
It's really up there (or out there, maybe, would be a better word) on the real surface of the real tiny point of light that we call Mars. People put it there.
It's out there to tell us what it finds. Eventually, it will break down, waiting to be recovered or discovered or never seen again. How can your heart not go out to it?
The dialogue was summoned via bibliomancy (and slightly modified), from a poem by Nuala Ní Dhomhnaill, as translated by Michael Longley.