Sierra Space, a Louisville, Colo.-based commercial space transportation and infrastructure company, raised $1.4 billion in Series A funding at a $4.5 billion valuation.
Why it matters: This is one of the largest VC raises ever for an aerospace company, and moves Sierra Space closer toward its ultimate goal of building a private space station in orbit. In the meantime, it's also working on low-orbit spaceplanes that can deliver cargo and, eventually, crew.
