A series of large fundraising deals in Europe since the start of the year is raising hopes that the region could be turning a corner for early-stage space investments. European venture capital activity has lagged far behind the United States, where tech investors around a decade ago helped spawn a “newspace” movement that has flooded the industry with entrepreneurial startups. Young companies have long grumbled about how few sizable space-focused venture capital funds are in Europe compared with the other side of the Atlantic Ocean. But there are signs this could be changing as Europe’s plan for a 6 billion...