I, as well as I'm sure most of you, hear regularly how expensive it is to transport material (or people) to space even to the International Space Station (ISS) in low earth orbit. I'm sure it wouldn't be as practical for complex molecules but could beams of simple molecules like H2O, O2 or something with carbon be sent to the ISS via a directed molecular beam. I read there are molecular as well as atomic beams but what is their range that they would still be fairly focused? Also what technical ability is available now to put up a receiving dish or something like that of the molecular or atomic beam on the ISS to receive this beam of water, molecular oxygen or other simple molecules or atoms so they could be received and also not damage the structure of the ISS? I think these beams would have a tendency to spread out with distance from their source but I did read that these beams can be collimated. (Does that mean that can be kept more focused over greater distances in a narrower beam? I think if space scientists could get this molecular or atomic beam technology for peaceful uses to bring up to the space station most of the H2O, O2 or other simple molecules either the astronauts or perhaps some of the experimenters there need in great and steady quantities it could be cheaper than sending this material by rocket, even by SpaceX, to the ISS. But how feasible is this molecular or atomic beam technology to supply basic materials to the ISS or future private space stations or perhaps also with simple carbon or nitrogen containing molecules to the Moon in that case would it also be cheaper than mining these materials on the Moon? Anyway, I would be interested to hear from other people who know something more technically in the field of transmitting and receiving molecular or atomic beams to transport simple materials in quantity to space stations in LEO or even more distant bases.