Unrelated to the flyby of Pluto, the New Horizons probe contains VBSDC, a probe designed to study this substance. The gegenschein and zodiacal light are caused by this substance, whose porosities range from compact to fluffy . The Poynting-Robertson effect opposes the effect of radiation pressure on this stuff and pulls it towards the object that it is orbiting. Considering Mie Scattering by these things creates an extinction coefficient which quantifies interstellar reddening. Areas where this stuff is present in large quantities include the aforementioned zodiacal cloud, planetary rings, and the interstellar medium. FTP, name this material 
Unrelated to the flyby of Pluto, the New Horizons probe contains VBSDC, a probe designed to study this substance. The gegenschein and zodiacal light are caused by this substance, whose porosities range from compact to fluffy . The Poynting-Robertson effect opposes the effect of radiation pressure on this stuff and pulls it towards the object that it is orbiting. Considering Mie Scattering by these things creates an extinction coefficient which quantifies interstellar reddening. Areas where this stuff is present in large quantities include the aforementioned zodiacal cloud, planetary rings, and the interstellar medium. FTP, name this material which is loosely defined as any particles in space which are smaller than 0.1 microns.
Unrelated to the flyby of Pluto, the New Horizons probe contains VBSDC, a probe designed to study this substance.
space dust [Or cosmic dust or pretty much anything with the word dust in it]