Time lapse: Watch the Falcon Heavy placed on pad 39A

After a four-day delay due to a ground power supply anomaly and unfavorable weather, an Ariane 5 rocket lifted off at 4:23 p.m. EST (2123 GMT) Tuesday to send into orbit a hush-hush communications satellite for the Egyptian military and a spacecraft to expand the capacity of Inmarsat’s mobile Internet service.

SpaceX teams across the United States are readying for what the company’s chief operating officer predicts will be a record number of launches in 2020. Before the end of January, SpaceX aims to perform four Falcon 9 launches from Florida’s Space Coast — three for the company’s Starlink broadband network, and a crucial in-flight abort test for the Crew Dragon spacecraft no earlier than Jan. 11.

SpaceX launched 60 more Starlink internet relay platforms into orbit Sunday as the company ramps up network testing in Washington state and touts a streak of nearly 300 satellites launched since June without a spacecraft failure.