# How many atoms are in the average cubic square of interstellar space?

##### 1 Answer

Nov 19, 2015

1/4 or 0.25 atoms/

#### Explanation:

It has been calculated that there are roughly 0.25 atoms per cubic meter of interstellar space.

No. of atoms / cubic meter = Density of the Universe/ Mass of an atom

Density of the Universe = 5 x

Mass of an atom = 2 x

No. of atoms/ cubic meter = 5 x

No. of atoms/ cubic meter = 1/4 or 0.25 atoms/