Video: TDRS-M takes flight atop Atlas 5

For the third time in 10 days, SpaceX is readying a Falcon 9 rocket for launch Sunday from Florida’s Space Coast with another 60 Starlink internet satellites. This time, SpaceX aims to extend the record for reusing a Falcon 9 booster to nine flights.

The towering structure to be used for liftoffs of NASA’s Space Launch System rolled from a construction site to launch pad 39B at the Kennedy Space Center in Florida this week, arriving at the seaside complex Friday for a week of fit checks.

A refrigerator-sized satellite soared into orbit aboard an air-launched Northrop Grumman Pegasus XL rocket Thursday night over the Atlantic Ocean, finally setting off on a $252 million mission to probe the dynamic boundary region where space and Earth’s atmosphere meet.