As the title says, December’s prompt is music.
- Black Holes 4: Singularities, Tunnels, and Other Spacetime Weirdness
- Black Holes 3: Making black holes from ordinary stuff
- Black Holes 2: What are black holes made of?
- Black Holes 1: Imaging the Shadow of Darkness
- Memento Mori 2: From Pen, to Page, to Grave
- Memento Mori 1: Slip the Surly Bonds of Earth
- The Cosmos in a Heartbeat 3: The End is Just the Beginning
- A Cosmic Collection