Eau de Space

Crescent Nebula, constellation Cygnus                          Pear Tree Observatory

You can't breathe it, but apparently, you can smell it. Well, not directly, but like some odors here on Earth, the smell of space lingers, and astronauts say they can smell it on their equipment. What they can't seem to agree on is how to describe it: http://mentalfloss.com/article/58427/what-does-space-smell