Video: Falcon 9 with Crew Dragon briefly ignites engines (members only)

Stratolaunch’s rocket carrier jet, the largest aircraft in the world by wing span, took off Saturday morning from the Mojave Air and Space Port in California for its first test flight.

NASA officials announced Thursday that the agency will move forward with the development of a plutonium-powered robotic quadcopter drone to explore Saturn’s moon Titan, a hazy world covered with dunes and methane lakes that scientists say is reminiscent of the ancient Earth.

The next-to-last Delta 2 rocket is being stacked at its California launch site to take flight in January to put a civilian weather satellite into polar orbit.