Q&A with Guglielmo Aglietti, RemoveDebris principal investigator (members only)

Eight miniature weather observatories, each the size of a piece of carry-on luggage, were installed on a specially-designed deployer module and mounted on the front end of an air-launched Pegasus XL rocket to prepare for Monday’s flight into orbit.

Liftoff of a previously-flown Falcon 9 rocket from NASA’s Kennedy Space Center with a European-built television broadcast satellite has been pushed back from Saturday until at least next Wednesday night, officials said.

A communications satellite built for the South Korean military arrived at Cape Canaveral this week from an Airbus factory in France to begin final preparations for launch on a SpaceX Falcon 9 rocket in July.