OXIDIZE'!? SpaceX Revealed WHY Starship Flight 10 Heat Shield Discolored after Reentry...

Success. Ship 37's latest flight was executed flawlessly, ending with a smooth landing. Yet, at the very end, something unusual caught viewers's attention. The heat shield. Its color and coverage looked different from expectations, raising important questions. Why is ship 37's heat shield in this condition? and how should SpaceX refine this critical system moving forward? Let's dive into the answers on today's episode of Great SpaceX. It can be said that compared to the Superheavy booster, the journey of the ship draws much more attention. This is because this stage of the mission has faced numerous problems in earlier flights and it also carries greater responsibility since it must accomplish many tasks with the ability to return safely being the most critical. Remarkably, after three consecutive flights that ended with problems, SpaceX has now successfully brought the ship back. Previous challenges such as harmonic reactions within the structure, hardware malfunctions in the engine compartment, or failures in the composite over pressure vessels that damaged the fuel tank and caused methane leaks in the nose cone have been resolved. Yet, within this major success, there is another factor that must be addressed. That is the heat shield. the system that protects the ship during the most dangerous phase of the mission. More than any other stage, re-entry is the harshest and most demanding test in Starship's flight. On this occasion, the heat shield did its job well, protecting the ship as it endured extreme forces. The only noticeable issue was a small fire near the base of the aft flap. Although this problem had already been present before re-entry, the upgrades that SpaceX introduced and tested on this flight can therefore be considered successful. However, as I mentioned quite earlier, the heat shield this time displayed something unusual. A large striking orange region appeared across the vehicle, which was not visible in earlier flights where we saw Starship return intact. What made it even stranger was that this phenomenon was not evenly distributed, but rather concentrated from the bottom of the payload section. Why did this occur? To begin with, it's certain that the orange discoloration represents areas that experienced extreme heating during re-entry. At first, some believed that tiles had fallen off, exposing the stainless steel structure to the intense re-entry environment, which would explain the discoloration. Yet, this explanation is unlikely. The tiles appeared intact before the flip maneuver, and it's doubtful that such a large number could have been lost at once without a visible impact. Another explanation suggests that the effect came from metallic tiles. On this flight, SpaceX tested metallic thermal protection tiles, which are widely believed to be made from stainless steel. Evidence supporting this comes from the distinctive inverted white V-shaped streaks at the top of the orange zone, as well as another streak at the aft. The orange coating seems to originate from the tips of these V-shapes. When we compare pre-flight images, we notice clear differences at these points, which may indeed be locations where metallic tiles were installed. If this is correct, then it means the metallic tiles could not fully withstand re-entry. The material may have oxidized or degraded under extreme heating as they burned or rusted. The resulting material could have been carried by the supersonic shock wave spreading across a wide area and leaving the distinctive orange mark. However, this theory also has its weaknesses. SpaceX likely did not install enough metallic tiles for their failure alone to create such a large and dramatic effect. This brings us to a third hypothesis which seems the most convincing. It proposes that the phenomenon was caused not by the tiles themselves but by the coolant used in conjunction with them. Unlike the tiles, the coolant exists in large enough quantities to produce an effect on the scale we observed. Which coolant could have been responsible? It's highly possible that SpaceX used one of Starship's propellants for this purpose and liquid oxygen appears the more likely choice. There are two reasons for this. First, Starship carries a greater volume of liquid oxygen compared to liquid methane. Second, only oxygen could produce the kind of effects that match what we saw. The white V-shaped streaks may represent the escape of liquid oxygen, while the orange coloration could be the spreading and reaction of this fuel. Oxygen could have influenced the discoloration in two ways. It may have directly oxidized the metallic tiles, causing rust to form, which then spread during re-entry. This is particularly plausible if the tiles contained iron since it would oxidize into iron oxide. Alternatively, the liquid oxygen may have leaked from the metallic tile installation points, spread downward along the vehicle, and remained stable in that position due to the effects of the supersonic shock wave. When exposed to the extreme heat of re-entry, the oxygen would intensify combustion and alter the appearance of the tiles, creating the orange hue we observed. This exploration is compelling because it accounts for both the scale and the placement of the effect. More importantly, unlike the other two theories which suggest flaws in the heat shield, this one indicates that the unusual appearance might actually demonstrate a step forward. If true, it means SpaceX has been able to successfully test aspects of an active cooling system for the heat shield, which could prove essential for future missions. So, what do you think? Which of these hypotheses do you find the most convincing? Or do you have another explanation for the striking effect we saw on ship 37's heat shield? Share your thoughts in the comments, and don't forget to like the video and subscribe to our channel to continue following SpaceX's incredible journey of development. In any case, whatever happens in the near term, it's clear that SpaceX must continue improving the heat shield system on Starship. This recent landing was certainly impressive and in many ways it was as successful as the remarkable ship 6 landing, which until now had been considered the best demonstration of Starship's reusability potential. However, despite these promising results, it's unlikely that this was SpaceX's ultimate goal. Even if S37 was recovered using the catching method, it still face a difficult path toward true reusability. Many of the protective tiles may need to be replaced or repaired, which means the spacecraft cannot yet be turned around for rapid reuse in the same way that Falcon 9 boosters routinely are. Until the heat shield can endure repeated flights without extensive refurbishment, SpaceX has not yet achieved the full vision of reusability that drives the Starship program. That said, what has been achieved on this flight is still tremendously valuable. SpaceX now has an enormous amount of data, both from visual observations and from the wealth of sensors on board. With this data, engineers can carefully analyze what occurred during re-entry, and make targeted improvements to the heat shields material composition, its cooling systems, and its ablade of protective layers. Experiments such as deliberately removing tiles or testing metallic tile variants were both steps in understanding the systems performance. Going forward, SpaceX will likely continue to adjust these approaches, fine-tuning the design until they reach a more sustainable solution. In fact, SpaceX still has one more opportunity in the V2 series to refine these upgrades, and that lies in flight 11. This final flight of the current generation is expected to serve as a proving ground for new improvements. Already, early images of ship 38, which will likely fly that mission, show notable differences. Among the most visible changes is a distinct adhesive layer between the tiles, which suggests an effort to increase durability and reduce the likelihood of tiles detaching during flight. One of the key goals for this next mission is to return the ship to its launch site. To do this, Starship must not only reach orbit, but also survive a much harsher re-entry, pushing the heat shield to its limits and testing upgrades made since flight 10. If SpaceX succeeds in returning the ship to the launch site, the famous Mechaz-illa catching arms may finally come into play. This possibility is especially intriguing given how well controlled the landing of S37 already was. A successful catch would represent a revolutionary step forward, not only proving the viability of full reusability, but also offering SpaceX the best possible data about how the heat shield behaves in real world conditions. This would help explain anomalies such as the unusual discoloration seen on ship 37's heat shield. And from there, the company could further optimize the design as it transitions into the next developmental phase known as Starship V3. Looking further into the future, Starship V3 is expected to feature breakthrough upgrades, especially in its heat shield design. Beginning with flight 12, which could take place later this year, the V3 vehicles will benefit directly from the lessons learned on flights 10 and 11. One of the most anticipated upgrades is the introduction of metallic tile systems for melting tests, something SpaceX has hinted at in the past, but has not yet fully implemented. Such a design could eventually serve as the foundation for a Mars capable heat shield robust enough to endure the intense re-entry into the Martian atmosphere. In short, while the recent results were impressive, they represent another stepping stone toward the long-term goal. The coming months will be critical in determining how far the heat shield system can be pushed and how close SpaceX can come to achieving true reusability. Turning now to a different but equally fascinating development in the world of space exploration. Russia has taken an interesting step with the launch of its latest orbital biological research mission. The country recently launched the Bion M number two biosatellite from the Bikiner Cosmo in Kazakhstan at 1:13 p.m. Eastern Daylight Savings Time on the 20th of August. This mission represents a continuation of Russia's long history of biological research in orbit. On board the satellite are 75 mice, a thousand fruit flies, a range of microbes, plant seeds, and cell cultures. To expand the scope of research, the spacecraft also carries simulated lunar soil and rock samples. For one month, the Bion M biosatellite will orbit Earth, exposing organisms and biological samples to microgravity and radiation. Its purpose is to study how prolonged space flight affects life from microorganisms to mammals. Afterward, the capsule will re-enter the atmosphere, descend under parachute, and be retrieved for laboratory analysis. These missions are vital for preparing human exploration of deep space, especially the moon. By studying how biology responds to radiation and microgravity, scientists can identify risks and develop countermeasures for astronauts. Russia, now prioritizing the moon, is working with China and others on the International Lunar Research Station planned for the 2030s. The Bion program has deep roots. The first series flew decades ago with Bion 11 launching in 1996. Its successor Bion M continues with modern advances. The first flight in 2013 carried a wide range of organisms from rodents and amphibians to crustaceians, insects, and cell cultures. Indeed, such research builds the foundation for deep space biology, helping determine how to safely send life beyond Earth. The findings may shape not only Russia's lunar plans, but also the future efforts by NASA, SpaceX, and other space fairing organizations. If the data proves valuable, biosatellite missions could become more common, supporting humanity's goal of extending life into space. Together, SpaceX's engineering breakthroughs with Starship and Russia's biological research highlight the parallel tracks of progress. One pushes technology to achieve reusability. The other addresses the challenges of living in space. Both bring us closer to a future where humanity can not only reach the stars, but thrive among them. In any case, this has been Kevin with Great SpaceX. Don't forget to like the video and subscribe if you haven't already to stay up to date with yours truly on the latest milestones in SpaceX's journey. Thank you so much for watching and always remember, curiosity, imagination, and inspiration will follow you so long as you keep looking up.