Brain organoids, hardware for manufacturing artificial retinas and the final sets of roll-out solar arrays for the International Space Station are all riding on a single SpaceX Dragon that NASA lists for liftoff no earlier than Oct. 13, 2026. The flight, designated CRS-35, is the 35th SpaceX commercial resupply mission the agency has contracted for the orbital laboratory.
Because the date is a no-earlier-than target, it marks the first day the launch could happen and not a commitment, and a Falcon 9 countdown can move for weather, vehicle readiness or range scheduling without changing the mission itself.
The Oct. 13 target and what NASA has posted
NASA’s CRS-35 mission page, last updated Oct. 2, lists the launch as no earlier than Oct. 13, 2026, still classed as a future mission, with a Falcon 9 rocket carrying the Dragon cargo spacecraft to the station. The page describes the purpose as delivering science, supplies and hardware to the orbiting laboratory, and sends readers to NASA’s commercial resupply and space station blogs for milestone updates as launch approaches.
The agency had not posted a liftoff time. The launch tracker Next Spaceflight lists the attempt for 10:33 GMT on Oct. 13, from Space Launch Complex 40 at Cape Canaveral Space Force Station, which works out to about 6:34 a.m. Eastern. That time is the tracker’s, not NASA’s, and it can move with the date.
The earliest public signal came in September. A NASA media advisory dated Sept. 17 said NASA and SpaceX were targeting no earlier than October for a launch from Cape Canaveral, and it opened accreditation for U.S. media, with an application deadline of 11:59 p.m. EDT on Oct. 1.
Roll-out solar arrays and a cargo of biomedical research
NASA’s advisory names the main items. Dragon will carry food, supplies and equipment for the crew, plus the final sets of the station’s International Space Station Roll-Out Solar Arrays, known as IROSA. The science list includes hardware for manufacturing artificial retinas in microgravity, 3D heart cell models for large-scale drug testing, materials for a study of how a new type of glass forms in microgravity, and brain organoids that could point to treatment targets for neurodegenerative diseases.
The solar arrays are an upgrade program with a long history. In an earlier NASA explanation of the new arrays, the agency said six IROSA units would give the station a 20 percent to 30 percent increase in power for research and operations. Each is expected to generate more than 20 kilowatts, which NASA says adds up to 120 kilowatts during orbital daytime and, at completion, up to 215 kilowatts available for station operations. Boeing is NASA’s prime contractor for the arrays, with Spectrolab and Deployable Space Systems as major suppliers.
That same NASA page describes how the arrays reach their positions: each installation takes two spacewalks, one to prepare the worksite with a modification kit and another to install the array. The same page lists earlier pairs: IROSA 2B and 4B in June 2021, IROSA 3A and 4A in November and December 2022, and IROSA 1A and 1B in June 2023. The units on CRS-35 are the final sets, according to NASA’s September advisory, so the cargo closes out a hardware program that began in 2021, and each unit carried up will again depend on the two-spacewalk sequence NASA describes before it adds power.
The Commercial Resupply Services contract structure
NASA describes the Commercial Resupply Services program as partnerships under which the agency buys services from commercial companies that build, own and operate their own spacecraft, so that the United States keeps a national capability to deliver research to the station. Two companies fly under it: SpaceX with the Dragon capsule, and Northrop Grumman with the Cygnus spacecraft.
The agency’s resupply blog archive places this flight in a sequence of numbered missions. It records CRS-34 as scheduled to launch on May 12, 2026 at 7:16 p.m. EDT from Cape Canaveral Space Force Station, and CRS-32 as launching on April 21, 2025 at 4:15 a.m. EDT from Kennedy Space Center. Those two entries bracket the launch times NASA has used for recent Dragon flights, one in the early morning and one in the evening, so the 6:34 a.m. Eastern time carried by the tracker for CRS-35 is plausible but unconfirmed by the agency until NASA publishes its own schedule.
NASA has not published a docking time for CRS-35, and nothing in the agency’s mission page says how long Dragon will remain at the station once it arrives. The date question will be settled by whatever NASA posts on its mission page and blogs between now and Oct. 13, and the mission page itself is the source that carries the Oct. 13 figure.
This article was produced with the assistance of AI and reviewed by Morning Overview editors prior to publication.
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