by Eric
Space has become an essential domain of modern military operations, acting as an invisible nervous system that underpins global communication, navigation, intelligence gathering and coordination. For space-faring militaries like those of the United States, China and Russia, the ability to observe the world, transmit messages, and synchronise decisions through satellites gives a substantial strategic advantage. If an adversary disables or disrupts these capabilities, it can severely hinder a nation’s capacity to fight effectively. Such disruption has already been observed in real-world conflicts. In Ukraine, for instance, interference with space-based systems has led to malfunctioning munitions, disoriented soldiers, and overall breakdowns in military operations.
While the public may imagine space war as explosive battles between satellites, the reality is more subtle. Most of the space conflict currently underway is non-kinetic and involves attacks like jamming, spoofing, cyber interference and laser disruption. Jamming entails drowning out satellite signals with high-powered radio transmissions, making communication impossible. Spoofing involves sending misleading instructions to satellites, causing them to misbehave or malfunction. Both techniques are used regularly and are hard to trace, offering plausible deniability to attackers. Laser weapons, long imagined in science fiction, can now temporarily or permanently blind satellites used for imaging or surveillance, depending on their power. Cyber attacks represent a particularly alarming threat. Hackers can infiltrate satellite systems to steal data, disable services, assume control, or implant dormant malware for later activation. This was starkly demonstrated in 2022, when Russia, just before launching its full-scale invasion of Ukraine, targeted satellites delivering internet to Ukrainian forces, effectively knocking them offline. Similar attacks have been attributed to China, whose hackers breached Japan’s space agency the following year.
Ground infrastructure is also a critical vulnerability. Attacks on launch facilities or control stations can be just as effective as destroying the satellites themselves, as they prevent vital communication or satellite replacement during wartime. These non-kinetic attacks are often favoured because they don’t generate dangerous debris and are less escalatory, though they have the disadvantage of being reversible.
The more traditional kinetic attacks, while less frequent, are still significant. These include destroying satellites with missiles or targeting ground stations. Nations such as the US, China, India and Russia have demonstrated anti-satellite capabilities, typically destroying their own decommissioned satellites to send a warning signal to adversaries. However, these tests produce large amounts of space debris, as seen in the Russian test in 2021, which endangered the International Space Station and other satellites. A newer, more sophisticated approach involves co-orbital manoeuvres—satellites engaging with other satellites in orbit. China’s SJ-21, for example, demonstrated this by rendezvousing with a defunct satellite, capturing it using a robotic arm, and pushing it into graveyard orbit. While presented as a clean-up mission, such manoeuvres could also be used for military purposes, such as disabling or repositioning enemy satellites. Chinese military researchers have even proposed planting explosive devices into satellite exhaust ports to destroy them at a later time. Russia has also demonstrated suspicious satellite behaviour, with some of its spacecraft approaching US satellites and allegedly deploying unknown projectiles.
Though the United States has not confirmed the existence of such satellite-on-satellite weaponry, it has openly acknowledged its capacity to develop them if needed. One of its most secretive space platforms is the X-37B, an experimental space plane that has been operating in orbit for years. It is believed to be testing advanced technologies such as solar energy conversion into high-powered microwaves or laser systems. China has a similar drone, also shrouded in secrecy. These capabilities mark a revival of Cold War-era ideas, many of which were once dismissed as too costly or impractical. Among these is the missile defence system originally known as Brilliant Pebbles, now rebranded as the Golden Dome. This shield would involve deploying interceptor satellites that could shoot down incoming missiles, and Elon Musk is reportedly a key figure in its potential development.
The notion of putting nuclear weapons into space is perhaps the most alarming historical concept. During the Cold War, both the US and Soviet Union experimented with detonating nuclear weapons in the upper atmosphere to study their effects. The results were catastrophic for space infrastructure, with electromagnetic pulses from the explosions disabling numerous satellites. These tests led to treaties prohibiting the placement of nuclear weapons or other weapons of mass destruction in orbit—a rare example of global consensus on limiting space militarisation. Nonetheless, as space becomes increasingly militarised, the lines between civilian, commercial and military applications continue to blur. Technologies developed for peaceful purposes can quickly be repurposed as weapons in times of conflict. Although no active weapons are currently stationed in space, many systems now in place could be modified to serve offensive roles if hostilities escalate. The quiet war in space is already underway, not with explosions, but with invisible interference, cyber sabotage and orbital manoeuvres—actions that could determine the outcome of future conflicts on Earth.
