"Nope, definitely not aliens, "Garcetti wrote on Twitter as he posted an unbelievable photo".
The California-based aerospace manufacturing company founded by Elon Musk launched its Falcon 9 rocket Sunday evening.
The historic part of the mission will occur soon after the launch when SpaceX attempts to land the first stage of the Falcon 9 rocket at Vandenberg. A sonic boom sounds like an explosion or thunder and is the result of shock waves from a vehicle traveling faster than sound.
Then a secondary challenge: SpaceX will try to land the first stage of their rocket back at a landing zone.
"Vandenberg LZ-4, the Falcon has landed", a member of SpaceX's launch team reported.
Shortly afterward SpaceX confirmed that SAOCOM 1A had been successfully deployed in record time.
Argentina's National Commission on Space Activities, or CONAE, will operate the two SAOCOM satellites in cooperation with the Italian Space Agency's COSMO-SkyMed radar satellites.
Two minutes later, the second stage engine shut down as planned and two-and-a-half minutes after that, the SAOCOM 1A satellite was released into the planned polar orbit. "Flying both constellations along the same orbit supports a rapid response by providing SAR information in emergency situations".
Proving out a successful booster retrieval system on the West Coast marks another step in SpaceX's drive to increase rocket reusability and as a result drive down the cost of access to space.
A SpaceX Falcon 9 rocket carrying the SAOCOM-1A Earth-observation satellite launches from California's Vandenberg Air Force Base on October 7, 2018. It has previously made such landings on drone ships in the ocean.