4 private spaceflight companies you need to know about
Almost any space nerd will tell you that the future of the space industry hinges upon private spaceflight.
Of course, almost anyone with an interest in tech and space knows about Elon Musk's SpaceX or Jeff Bezos' Blue Origin, two heavy-hitters in the commercial spaceflight industry.
But what about the other, less known, less accomplished, yet still important companies out there hoping to leave their marks on spaceflight?
Here are a few of the space companies you should be keeping a close eye on in the future. Read more...