HAWTHORNE—The California rocket company that launched a spacecraft into orbit and successfully returned it to Earth this week has revealed its secret payload — a wheel of cheese. Space Exploration Technologies on Thursday released photographs of the wheel in a container that was bolted to the floor of its Dragon capsule for Wednesday’s test flight from Florida. SpaceX says the flight of the round of Le Brouere was a tribute to the Monty Python comedy team, which had a famous cheese shop sketch. The capsule parachuted to a Pacific Ocean splashdown and the cheese is now on a barge headed to California. The Hawthorne-based company is the brainchild of PayPal co-founder Elon Musk. He’s developing rockets and the Dragon spacecraft for NASA supply missions to the International Space Station.