Video: New Horizons phone home will confirm health of spacecraft

United Launch Alliance teams loaded super-cold liquid hydrogen and liquid oxygen into an Atlas 5 rocket Friday at Cape Canaveral during a countdown dress rehearsal for a planned launch next month with the Solar Orbiter mission, a robotic spacecraft to study the origins of the solar wind and image the sun’s poles for the first time.

Ground teams have approved plans for Japan’s Hayabusa 2 sample return mission to briefly land on asteroid Ryugu for the second time July 11, aiming for a targeted touch-and-go to gather material exposed by an explosive impactor released by the robot explorer in April.

NASA’s Perseverance rover will depart Cape Canaveral Thursday on a $2.7 billion mission to Mars, carrying with it the first interplanetary aircraft, sophisticated instruments to search for signs of ancient life, and drill to core samples for eventual return to Earth.