Watch 2 SpaceX rockets launch new Starlink fleet and secret US spy satellite in space doubleheader today (Sept. 5)

A white and black SpaceX Falcon 9 rocket with used booster stands atop the launch pad.
A SpaceX Falcon 9 rocket carrying Starlink satellites at Florida's Cape Canaveral Air Force Station. A new Starlink mission will launch on Sept. 4, 2024. (Image credit: SpaceX via Twitter)

SpaceX will launch a new batch of its Starlink satellites into orbit on Thursday (Sept. 5) after a one-day delay due to weather and you'll be able to watch it live online. In fact, it's the first of two SpaceX launches today.

A SpaceX Falcon 9 rocket will launch 21 Starlink internet satellites to space from the company's Space Launch Complex 40 pad at Cape Canaveral Space Force Station. Liftoff is now scheduled to launch at 11:33 a.m. EDT (1533 GMT). You can watch it live on SpaceX's X account (formerly Twitter), starting about five minutes before liftoff. A second Falcon 9 rocket will launch late tonight from Vandenberg Space Force Base in California to deliver a classified NROL-113 payload to orbit for the National Reconnaissance Office. That mission will lift off at 11:20 p.m. EDT (9:20 p.m. PT/0320 Sept. 6 GMT) and will also be streamed live on X.

SpaceX initially aimed to launch the Starlink 8-11 mission, as the company calls it, on Sept. 4, but delayed it by 24 hours due to "unfavorable booster recovery weather conditions in the Atlantic." On Thursday, the company pushed the launch time back another three hours. Included among the new Starlink satellites are 13 units with "Direct to Cell" capabilities, SpaceX said in a mission description. The company has a backup launch window at 12:31 p.m. EDT (1631 GMT) on Thursday. 

SpaceX's Starlink 8-11 mission will fly on a veteran Falcon 9 first-stage booster that is making its 15th flight with Thursday's launch. The booster is expected to return to Earth just over eight minutes after liftoff, landing on SpaceX's drone ship Just Read The Instructions nearby in the Atlantic Ocean. 

The Falcon 9 rocket previously launched eight Starlink missions, NASA's Crew-5 astronaut flight in March 2023, a Northrop Grumman NG-20 Cygnus cargo mission and a Dragon supply flight for NASA, two commercial satellite missions and one Space Force GPS III flight. 

The Falcon 9 booster launching the NROL-113 payload is an even more accomplished veteran. It will be making its 20th flight after successfully launching 14 Starlink missions, a series of commercial satellite flights and science flights for NASA, including the agency's DART asteroid crash mission and the Sentinel-6 Michael Freilich ocean-watching satellite, according to a mission overview.

Thursday's launches will be the third Starlink mission and fourth overall in a week as SpaceX continues to build up its space-based megaconstellation to provide high-speed internet access around the globe and fulfill customer flights. The company launched two Starlink missions, each with 21 satellites, in just over an hour on Saturday (Aug. 31). Like today's flight, each of those earlier missions included 13 direct-to-cell satellites, which can provide internet service directly to mobile smartphones.  

All four Starlink missions come less than a week after a failed Falcon 9 booster landing at sea on Aug. 28. A Federal Aviation Administration investigation into that issue is ongoing, but SpaceX was cleared for launches while it is underway, FAA officials have said.

Editor's note: This story was updated at 9 am ET on Sept. 5 to note SpaceX's new launch time for Starlink 8-11 and its second launch for NROL-113.

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Tariq Malik
Editor-in-Chief

Tariq is the Editor-in-Chief of Space.com and joined the team in 2001, first as an intern and staff writer, and later as an editor. He covers human spaceflight, exploration and space science, as well as skywatching and entertainment. He became Space.com's Managing Editor in 2009 and Editor-in-Chief in 2019. Before joining Space.com, Tariq was a staff reporter for The Los Angeles Times covering education and city beats in La Habra, Fullerton and Huntington Beach. In October 2022, Tariq received the Harry Kolcum Award for excellence in space reporting from the National Space Club Florida Committee. He is also an Eagle Scout (yes, he has the Space Exploration merit badge) and went to Space Camp four times as a kid and a fifth time as an adult. He has journalism degrees from the University of Southern California and New York University. You can find Tariq at Space.com and as the co-host to the This Week In Space podcast with space historian Rod Pyle on the TWiT network. To see his latest project, you can follow Tariq on Twitter @tariqjmalik.