On the morning of February 28, 2026, Israeli F-15 fighter jets took off quietly and flew into position. Two hours later, at 9:40 in the morning Tehran time, the sky above Iran's capital broke open. Thick smoke rose from multiple locations. One of the targets was a heavily guarded compound on Pasteur Street in central Tehran — the residence of Iran's Supreme Leader Ayatollah Ali Khamenei. By the next morning, at 5:00 AM, Iranian state media confirmed what the world already suspected. Khamenei was dead. He was 86 years old and had ruled Iran since 1989. The weapon that reached him was not a stealth bomber. It was not a drone. It was a missile that had briefly left the Earth's atmosphere and came straight down from the edge of space.
That missile was called the Blue Sparrow. Built by Israel's Rafael Advanced Defence Systems, the Blue Sparrow weighs about 1,900 kilograms and is 6.5 metres long — roughly the size of a small car stretched into a tube. It is launched from a fighter jet flying at high altitude. Once released, the missile does something no ordinary weapon does — it climbs steeply upward, exits Earth's lower atmosphere, then the front section separates and drops almost vertically back toward the target at speeds exceeding Mach 5 — that is five times the speed of sound, around 6,000 kilometres per hour. It uses both GPS and an internal navigation system to stay locked on target even when GPS signals are jammed.
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The advantages of missiles that travel through space are significant. “One of the most important advantages is global reach. Because the missile’s trajectory extends beyond the atmosphere, it can travel extremely long distances with relatively little atmospheric drag, allowing strategic weapons to strike targets thousands of kilometers away. Another advantage is speed. Ballistic missiles and hypersonic vehicles that travel through near-space can reach speeds between Mach 10 and Mach 20 during the mid-course and re-entry phases. Such speeds drastically reduce the time available for detection and interception. High-altitude trajectories also allow missiles to approach targets from unexpected directions, bypassing radar coverage designed to monitor traditional flight paths. These factors make space-trajectory weapons extremely difficult to defend against and provide significant strategic advantages during military conflicts,” explained Srimathy Kesan, founder and CEO of SpaceKidz India.
In practice, many modern missiles already travel through near-space during their flight. Ballistic missiles typically follow a trajectory that briefly leaves the atmosphere before descending toward their targets. During the boost phase, powerful rocket engines accelerate the missile upward until it exits most of the atmosphere. The missile then enters a mid-course phase where it travels through near-space before descending back toward Earth. This trajectory often crosses the Kármán line, located roughly 100 kilometers above Earth’s surface and widely considered the boundary between the atmosphere and outer space.
“Once the missile reaches its highest point, known as the apogee, the warhead separates and re-enters the atmosphere at extremely high speeds, often exceeding Mach 5. At these velocities, the re-entry vehicle is classified as hypersonic, making interception extremely difficult for conventional air defence systems,” added Kesan.
Now here is the crucial point. Iran had Russian-made S-300 missiles and its own Bavar-373 air defence systems deployed across Tehran. These are not cheap or weak systems. They are billion-dollar networks. But they were designed to scan the horizon, watching for jets approaching from a distance, or cruise missiles flying low and fast from the side. Nobody designed them to look straight up.
“The Blue Sparrow came from directly above, nearly vertical, at hypersonic speed. Iranian air defenders reportedly had only a few seconds of warning. Not enough to do anything meaningful. Khamenei's compound, which was reinforced with thick concrete and steel, was shattered by the sheer kinetic force of the missile hitting at that speed. The physics are brutal. A 1,900-kilogram object travelling at Mach 5 hits with the force of a building collapsing on top of you,” explained space analyst Girish Linganna.
So the question that defence experts are now asking is — what if Iran had the kind of satellite tracking system that the United States Space Force is right now building? Could it have saved Khamenei?
Let us think about this carefully. The American satellite system called the Proliferated Resilient Missile Warning and Tracking System uses infrared sensors placed in Medium Earth Orbit, about 10,000 to 20,000 kilometres above Earth. Infrared means these sensors detect heat. The moment a missile's engine ignites, it produces a massive heat signature visible from space. Even the Blue Sparrow, launched from an Israeli F-15 fighter jet, would have released a detectable heat trail the instant its rocket motor ignited after separation from the aircraft.
If Iran had even a basic version of such space-based tracking infrastructure — satellites watching the sky above and around Israeli territory, the launch could have been detected within seconds. Such detection would have been sent to ground-based defence systems with one critical piece of information: where is this missile going, and when will it arrive?
“Remember our cricket analogy from before. A fielder cannot catch a ball if he starts running after it lands. But if someone is watching from a tall building shouting directions —’it is going left, now curving right, coming down fast at point three on the field’ the fielder can move early, position himself correctly, and catch it. The satellite is that person on the tall building. Without it, the fielder in this case, Iran's ground-based interceptor missiles, is essentially running blind,” remarked Linganna.
The Blue Sparrow's near-vertical descent was its deadliest quality. But even that descent takes time, perhaps 90 seconds to two minutes from the point it re-enters the atmosphere to the point of impact. That is not much time, but it may be just enough for a well-positioned interceptor missile that already knows the incoming trajectory. The problem is that without space-based tracking feeding real-time data, Iran's ground systems simply did not know the full flight path until it was too late to act.
This is exactly why the United States is investing ten thousand crore rupees just in the second batch of its missile-tracking satellites. This is why they are building three-layer satellites in high orbit to catch the launch, satellites in medium orbit to track the full flight, and satellites in low orbit to refine the final moments. Each layer talks to the next. Together, they give defenders a complete, real-time picture of a missile's entire journey, from the moment the engine fires to the moment before impact, enough time to respond.
Iran is now rebuilding its leadership and, no doubt, reviewing every gap in its defences. The lesson of February 28 is written in smoke and debris across Pasteur Street. A missile that comes from the edge of space, dropping almost vertically at Mach 5, cannot be stopped by radar pointed at the horizon. The only way to stop it is to see it early from space itself.