2:21 PM EDT June 23, 2025 Updated: Previous Falcon 9 launches were live-streamed on the company's website. Photos from previous SpaceX launches seen over San Diego What is Falcon 9? According to SpaceX, Falcon 9 is a “reusable, two-stage rocket designed and manufactured by SpaceX for the reliable and safe transport of people and payloads into Earth orbit and beyond.” Falcon 9 is considered the world’s first orbital-class reusable rocket. What is Starlink? Starlink is "the world's first and largest satellite constellation using a low Earth orbit to deliver broadband internet capable of supporting streaming, online gaming, video calls and more," according to the service's website. The "constellation" of satellites consists of thousands of satellites that orbit Earth at an altitude of about 550 km, or 341 3/4 miles. The satellites connect to antennas that users set up at their homes to provide internet access. WATCH RELATED: SpaceX rocket lights up Southern California Monday night