Why is a rocket launching today?

Orbital launches have become so frequent that on most days at least one rocket lifts off somewhere. In 2024 the world recorded around 260 orbital launch attempts, the highest annual total in history, and the United States alone accounted for more than half of them. SpaceX flew Falcon 9 well over a hundred times that year, sometimes twice in the same 24 hours from Florida and California, while China conducted close to 70 launches and Russia, Europe, India, Japan and Rocket Lab from New Zealand added the rest.

The main driver is satellite constellations. Starlink alone requires a steady stream of batches of about 20 to 60 satellites to build and replenish its network, and it accounts for the majority of Falcon 9 missions. Other regular customers are government and commercial Earth-observation operators, navigation and communications satellites for national programmes, crew and cargo flights to the International Space Station and to China's Tiangong station, and rideshare missions carrying dozens of small payloads at once. Interplanetary launches remain rare, a handful per year.

Each launch is scheduled around a window defined by orbital mechanics: a rendezvous with the ISS, a specific orbital plane for a constellation, or a planetary alignment. Ranges also allocate slots among competing users, and weather, upper-level winds and boat traffic in the downrange zone can shift a flight by hours or days. The most reliable way to know what is going up on a given day is to consult the official schedules published by NASA, the FAA and the launch providers themselves (figures above as of December 2024).