The first well-resolved image of the faraway chunk of rock fleetingly visited by NASA’s New Horizons spacecraft on New Year’s Day reveals the object — officially named 2014 MU69 but nicknamed Ultima Thule — is made of two lobes scientists say came together in an ancient slow-speed collision just as the solar system’s planets were forming.

SpaceX launch crews rolled out the company’s next Falcon 9 rocket to pad 39A at the Kennedy Space Center in Florida, then lifted the two-stage launcher vertical for a hold-down engine firing Thursday in preparation for launch next week with a South Korean-owned commercial communications satellite.

The electric sports car shrouded inside the nose of the first Falcon Heavy rocket may conjure notions of a flight of fancy, but SpaceX founder Elon Musk says the powerful new launcher awaiting blastoff Tuesday from Florida’s Space Coast has a lot to prove.