NASA’s SpaceX CRS-35 cargo mission is targeted to launch at 6:33 a.m. EDT on Tuesday, Oct. 13, 2026, carrying more than 6,300 pounds of supplies and research payloads to the International Space Station. The cargo includes lab-grown brain tissue models, artificial-retina manufacturing materials, heart-tissue models, glass research materials and the station’s final set of roll-out solar arrays. This is a cargo resupply flight, not a crewed launch; at the time of NASA’s schedule, liftoff was still planned, not confirmed.
What is NASA sending to the ISS today?
CRS-35 is SpaceX’s 35th commercial resupply mission to the International Space Station. NASA’s Oct. 7 advisory set a 6:33 a.m. EDT launch target from Space Launch Complex 40 at Cape Canaveral Space Force Station. Dragon was scheduled to dock autonomously at about 11 a.m. EDT on Thursday, Oct. 15, at the space-facing port of the station’s Harmony module. Those are planned times, not confirmation that either event occurred. Check NASA’s CRS-35 mission page for operational updates.
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NASA puts the cargo load at more than 6,300 pounds. The payload combines experiments for human-health and materials research with operational hardware for the station.
What are the “mini brains” on the mission?
They are brain organoids: small, lab-grown three-dimensional models of human brain tissue. They are not miniature functioning brains, and they are not treatments. NASA says the organoids will spend five weeks in orbit and be compared with identical models kept on Earth. Researchers plan to examine how short-duration spaceflight affects brain tissue at the cellular level.
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The study could help researchers understand how the brain responds to stress and inform ways to address brain-health risks on future lunar and other exploration missions. NASA’s broader advisory also says the work could help identify treatment targets for neurodegenerative diseases such as Alzheimer’s, Parkinson’s and multiple sclerosis. These are research aims and possibilities; NASA has not reported results from this mission or established clinical benefits. NASA Science’s overview of the brain study describes its comparison design.
What else is in the CRS-35 cargo?
| Payload | Purpose | What it does—and does not—mean |
|---|---|---|
| Artificial-retina materials and hardware | Support research into manufacturing artificial retinas in microgravity. | The work could help efforts to restore vision on Earth; it is not an available therapy. |
| 3D heart-tissue models | Advance research into large-scale drug testing on future missions. | They are a research platform, not a validated replacement for clinical trials. |
| Glass-study materials | Let researchers study how a new type of glass forms in microgravity. | NASA’s advisory does not name the glass type or report an outcome. |
| Final set of IROSA solar arrays | Complete the station’s power augmentation. | This is station infrastructure, not an experiment. Astronauts are expected to install the arrays during future spacewalks, after delivery. |
NASA has described the station as having more than 25 years of continuous human presence; that is background about the ISS, not a result of CRS-35. The agency’s Sept. 17 CRS-35 advisory explains the IROSA installation context.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What should readers take away from these experiments?
The cargo points to three different purposes: studying human biology in space, testing materials and manufacturing conditions in microgravity, and improving the ISS’s power system. The brain, retina and heart-tissue payloads are planned research, not reported findings or ready-to-use medical technology. The solar arrays are hardware that will be installed later, rather than equipment that becomes operational simply by arriving on Dragon.
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NASA’s Oct. 7 mission advisory lists the scheduled payloads and describes the brain organoids as potentially useful for revealing treatment targets. NASA Science provides the five-week study detail; neither source reports a CRS-35 experiment result.
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