““‘Sophisticated and unmanned, the X-37B represents the next generation of reusable spaceplanes, conducting experiments in orbit that are returned to earth for further analysis,’ Secretary of the Air Force Barbara Barrett said in a statement.
That one sentence encapsulates the X-37B’s public persona and, of course, why the X-37B’s tight-lipped approach continues to inspire increasingly bizarre nicknames in foreign media circles. Both Russia and China have characterized the X-37B as something much more sinister than a proof-of-concept platform, ranging from the “space bomber” to other, more ominous-sounding monikers. But the more interesting narrative is less about what the X-37B can do, and more about what it demonstrates: America’s ability to deploy and then modify an object in orbit, and return hardware to Earth.
The baseline information is remarkably easy to come by, considering how secretive this platform is. The X-37B is a reusable orbital space plane operated by the U.S. Space Force, launched from rockets such as the Atlas V and Falcon 9, and lands autonomously on runways. It is 29 feet long, with a 15-foot wingspan and a launch mass of approximately 11,000 pounds. It also has a payload bay about the same size as a pickup truck bed, which is large enough for experiments, small payloads, and service modules but not necessarily for the kind of oversized strategic punch that would be suggested by the “nuclear space bomber” nickname. The ambiguity is still useful, however, as it forces adversaries to prepare for more than one possibility, even if none of them are true.
However, the duration of the mission, as opposed to the use of dramatic images, is where the X-37B continues to distinguish itself from other spacecraft missions. With a total of six missions under its belt, it has spent a cumulative total of over 3,774 days in orbit, with some missions extending well beyond a year. The Space Force has maintained a tight lid on all information until the mission touches down.
This is not just for show; it helps to conceal the mission profile and, importantly, the means of functioning within a dense orbital environment.
Perhaps the most telling look into what “operating” in the new era might look like came during OTV-7, where the service announced that the vehicle would engage in aerobraking, or using the drag of the atmosphere to adjust its orbit, as part of its experiments. In discussing the importance of data from these flights, Chief of Space Operations Gen. Chance Saltzman told Aviation Week, “It allows me then to apply physics-based, real-world data as we look. .. to create more resilient architectures.” He also pointed out the magnitude of the congestion issue, saying, “When we talk about data, I’m not talking about four or five numbers on a spreadsheet.”
The next step has been to make the testbed relevant to the Space Force’s effort to have more dynamic operations. A report by the Mitchell Institute stated that “adopting dynamic space operations … is absolutely critical,” and that resilience must be considered not only for satellites, but also for ground infrastructure, connections, and launch concepts. In this context, the X-37B class of vehicles is important because they can help prove out concepts of maneuver, autonomy, and “obfuscate mission capabilities” that are hard to simulate without actual vehicles flying actual missions.
OTV-8 sharpened that picture further. The Space Force announced the eighth X-37B mission launched on Aug. 21, 2025, from Kennedy Space Center on a Falcon 9, describing it as a “dynamic and responsive spacecraft” for tests and experiments. The mission set expectations without giving much awayOTV-8 sharpened that picture further. The Space Force announced the eighth X-37B mission launched on Aug. 21, 2025, from Kennedy Space Center on a Falcon 9, describing it as a “dynamic and responsive spacecraft” for tests and experiments. The mission set expectations without giving much away by pointing to laser communications demonstrations and a quantum inertial sensor experiment, both of which speak to operating when traditional links or navigation aids are degraded.
Put together, the X-37B’s enduring attraction is not a hidden superweapon narrative, but a quieter engineering reality: reusability plus autonomy plus maneuvering equals a reusable laboratory for “how to fight the spacecraft,” not just how to build one.
