Saturday 26 July 2014
Cosmic dust
can be taken to be all dust in the cosmos, as its name implies, or limited to
space dust in the Solar System. It is for the most part a type of small dust
particles which are a few molecules to 0.1 µm in size. By one estimate, as
much as 40,000 tons of cosmic dust reaches the Earth's surface every year. In October 2011,
scientists reported that cosmic dust contains complex organic matter ("amorphous
organic solids with a mixed aromatic–aliphatic structure") that could be
created naturally, and rapidly, by stars. Source
