Far outside our solar system in the vast nothingness of space the distance between gas and dust particles grows, limiting their ability to transfer heat. Temperatures in these vacuous regions can plummet to about -455 degrees Fahrenheit (2.7 kelvin) - The density of hydrogen atoms in space varies, but on average it's about one atom per cubic centimetre. However, the density can range from 0.1 atoms per cubic centimetre in the space between spiral arms to 1,000 atoms per cubic centimetre near the galactic core, the diameter of a hydrogen atom in nm is 0.1 - so lets just say that the probability of space being liquid hydrogen or helium is totally out of this world
