This set of 4" x 4" hardboard coasters with felt bottoms features 4 glossy astronomical images of the Horsehead Nebula, the Whirlpool Galaxy, the Dumbbell Nebula(M27), and the Helix Nebula(NGC 7293). Each set of coasters comes in a gift box.

If you respect wood, these coasters are for you!

Image Credits:
Neugent / Massey / Lowell Obs. / NSF.