Talk Around Town: SpaceX CRS-35 May Have Just Handed the ISS Its Final Solar Upgrade

What the Chatter Is All About

Word around the campfire is that this here CRS-35 mission might be something a little more special than your average grocery run to low Earth orbit. According to Spaceflight Now and Space.com — both of which had reporters watching the whole shindig — a SpaceX Falcon 9 left pad 40 at Cape Canaveral Space Force Station at 6:33 a.m. EDT on October 13, 2026, hauling a Dragon capsule full of science and station hardware. NASASpaceFlight.com characterizes the unpressurized trunk cargo as the fourth and last set of Redwire-developed, Boeing-built iROSA solar array wings the ISS will ever receive, making this, if everything shakes out, the final chapter of a power-upgrade story that started back in 2021. That is a bigger deal than finding a parking spot at the Walmart on Black Friday, and the space community has been talking about it accordingly.

The broader chatter also touches on the science riding upstairs in the pressurized section, which includes some genuinely eyebrow-raising biomedical work that, depending on who you ask, underscores why the ISS still matters even as it winds down toward a planned retirement. NASASpaceFlight.com broke down that payload in detail, and a handful of specialist outlets echoed the highlights. None of this is pure rumor — multiple independent sources confirm the launch itself — but several pieces of the puzzle, including the docking and the eventual spacewalk installations, remained outstanding at press time, so pump the brakes before you go calling it a done deal.

What We Actually Know for Certain

Here is the solid-ground stuff, confirmed by at least two independent reporters or NASA itself. Spaceflight Now and Space.com both reported that the Falcon 9 lit out of Cape Canaveral right on schedule at 6:33 a.m. EDT on October 13, 2026. Booster B1096, which was on its eighth flight according to Spaceflight Now and KeepTrack, stuck its landing back at Landing Zone 40 in fewer than 7.5 minutes flat — slick as a greased pig at a county fair. The Dragon spacecraft went on its merry way toward the ISS without apparent drama.

NASA's own ISS blog, backed up by NASASpaceFlight.com's independent payload breakdown, confirms the cargo manifest weighs in at more than 6,300 pounds total, with roughly 593 kg earmarked for science experiments, 383 kg for crew supplies, and 1,195 kg of unpressurized trunk cargo — that last chunk being where those iROSA wings live. Worth noting: NASA's May 2026 flight plan apparently pegged the cargo at more than 7,200 pounds, and no source has formally reconciled that gap with the post-launch 6,300-pound figure. Nobody's explaining that discrepancy, which is a little like somebody eating a whole casserole and then acting surprised the dish is lighter.

The seven-member Expedition 75 crew, as noted by NASA's ISS blog and corroborated by the Wikipedia CRS-35 article, was aboard the station waiting on Dragon's arrival. The plan, per both those sources, was for the capsule to sidle up to the zenith port on the Harmony module around October 15, roughly two days after launch. That docking had not been confirmed at publication time, so that particular fact is still in the 'we sure hope so' column.

The iROSA Finale: What's Been Said

NASASpaceFlight.com, KeepTrack, and Wikipedia's Roll Out Solar Array article all independently describe these two wings as the fourth and final pair in the iROSA series — the last set the station is getting, full stop. According to NASASpaceFlight.com, the arrays are slated to go on power channel 3B on the starboard S6 truss and on channel 2A on the port P4 truss, locations that Expedition 74 and 75 crews had already prepped through earlier spacewalks in 2026. That is like framing up the barn walls in the spring so you can raise the roof in the fall — most of the grunt work was already done.

NASASpaceFlight.com also reports that once these final arrays are bolted on by spacewalking astronauts, the station stands to gain an additional 20 to 30 percent of electrical power. That figure has not been independently verified by a second technical source, so take it as a reasonable estimate rather than a certified engineering guarantee. The actual installation spacewalks are still ahead, and as any farmer who has ever tried to put up a tin roof in a windstorm can tell you, 'slated to happen' and 'happened' are two different things entirely.

The Science Haul: What's Being Reported

NASASpaceFlight.com described the science manifest in some detail, and a few other outlets touched on the highlights. The experiment that seems to have captured the most attention is LambdaVision-1, which, according to NASASpaceFlight.com and tech-insider.org, aims to manufacture artificial retinas one layer at a time in microgravity. The investigators reportedly expect the weightless environment to produce layers that are more uniform and stable than what they can cook up on the ground — like getting a perfectly level concrete slab when your yard at home is all rutted up.

NASASpaceFlight.com also describes the Stellar Spheroids experiment, which is said to study how microgravity affects the growth and function of three-dimensional human heart tissue models, with researchers hoping these models will eventually be more useful for disease research and drug testing than current ground-based versions. Additional experiments involving brain organoids and even a shrimp project called SCAMPI were noted by NASASpaceFlight.com and partially echoed by other outlets. All of these science descriptions come from journalist-reported accounts rather than company press releases, but the details have not all been corroborated by multiple independent technical sources, so they are reported here with that caveat riding shotgun.

What Remains Unverified or Unsettled

A few things are still hanging in the air like a question mark nailed to a fence post. First and most immediately, Dragon's docking at Harmony's zenith port on October 15 was a plan, not a confirmed event, as of publication. Second, the 20-to-30-percent power increase figure attributed to the final iROSA installation comes solely from NASASpaceFlight.com and has not been cross-checked by a second independent technical analysis. Third, the actual spacewalks needed to physically attach the arrays have not happened yet, and scheduling, crew health, or hardware conditions could push them around. Fourth, as mentioned, nobody has officially explained why the cargo manifest apparently shrank from the May 2026 planning estimate of more than 7,200 pounds down to the post-launch reported figure of more than 6,300 pounds. And finally, while multiple sources agree this is the 'final' pair of iROSAs, the program's original scheduling went through at least two date changes — reportedly shifting from a planned November 2026 launch back to August and then landing on October — and no source has fully explained the musical-chairs timeline.

Our Analysis: Why This Might Actually Matter

This is analysis, not reporting, so consider the following our honest opinion rather than established fact. If the iROSA installation goes as planned, completing the power upgrade that started in 2021 is a legitimately significant milestone for a station that has been running on hardware old enough to collect Social Security. More electrical power means more science, more life support margin, and more operational flexibility — which matters considerably if the ISS is going to keep pulling its weight until a commercial successor can take over. It is a bit like finally finishing the wiring on a farmhouse you have been living in for twenty years; the house was surviving, but now at least you can run the air conditioner and the microwave at the same time.

The density and ambition of the science payload also strikes us as worth noting. Manufacturing artificial retinas in orbit, modeling heart disease in three dimensions, and studying how brain tissue organoids behave in weightlessness are not the kind of experiments you schedule on a station you have already written off. They suggest that researchers still see the ISS as a genuinely irreplaceable tool in its remaining operational years, even if the station's political and financial clock is ticking. Whether that bet pays off depends on things nobody can guarantee — including, for starters, whether Dragon docks cleanly and those astronauts get outside with their tools without a hitch.