Key PointsAstroscale and SKY Perfect JSAT are both space companies from Japan -- and they're both public.Last week, the two Japanese space companies announced a partnership to develop on-orbit satellite services.10 stocks we like better than Firefly Aerospace › In just a few weeks, the SpaceX IPO will arrive. Space investors are excited, with shares of popular names such as AST SpaceMobile and Rocket Lab up 43% and 65%, respectively, this month.…