Q&A with Curt Blake, president of Spaceflight Industries (members only)

Rocket Lab, a company eyeing a market to launch small satellites, said Monday that bad weather at its privately-operated launch base on New Zealand’s North Island kept a commercial Electron booster from lifting off on its maiden test flight for the second day in a row.

In the last few months, teams of SpaceX engineers working on the flat coastal plains of South Texas and in a nondescript industrial yard on Florida’s Space Coast have been building two futuristic-looking stainless steel rockets — or Starships — prototypes for a reusable vehicle the company claims could one day ferry people to Mars.

NASA officials gave approval Tuesday for SpaceX to begin regular crew rotation flights to the International Space Station with the launch of four astronauts set for Saturday from the Kennedy Space Center in Florida, signaling a transition from development to operations for the human-rated Dragon spacecraft.