Rocket Lab stock is lighting up a growth path in space.The news around Rocket Lab USA (RKLB -3.42%) just keeps getting better and better.Earlier this month, the satellite-launch company scored a bit of a coup when it parlayed a 2021 purchase of a tiny solar power company -- SolAero Holdings -- into nearly $50 million in U.S. CHIPS Act and other government subsidies. Solar cells are specialty semiconductors, and that means that SolAero's solar cells, tailored to produce electric power for spacecraft in orbit ...