How Does the Golden Dome Work?
How the Golden Dome would work: a layered detect-track-intercept design using space sensors, ground radars, and interceptors across a missile's flight.
Defense & Military Space
Space is now an operational warfighting domain. These pages explain the systems, weapons, and doctrine behind military space, from missile defense and hypersonics to anti-satellite weapons and the sensors that watch orbit, in plain and sourced language.
What Is the Golden Dome?
The Golden Dome is a U.S. homeland missile-defense initiative launched by executive order in 2025. Here is what it is, its layers, cost debate, and timeline.
Why military space matters now
For most of the space age, orbit was a place militaries used but did not fight over. Satellites provided navigation, communications, early warning, and reconnaissance, and both superpowers largely left each other's spacecraft alone. That understanding has eroded. The United States, China, and Russia have all tested weapons capable of destroying or disabling satellites, and every major military now treats space as a contested domain that can be attacked and defended like air, land, and sea.
The stakes are high because modern forces depend on space for almost everything. A single GPS constellation underpins precision weapons, logistics, and the timing signals that synchronize power grids and financial networks. Missile-warning satellites give the first indication of a launch anywhere on Earth. Take those capabilities away and a technologically advanced military loses much of its advantage. That dependence is exactly why space has become a target.
The threats we cover
Counterspace weapons fall into a few families. Anti-satellite weapons range from missiles fired from the ground to spacecraft that maneuver next to a target, plus non-destructive tools like jammers and lasers that dazzle sensors. GPS jamming and spoofing are already routine in conflict zones, degrading navigation without firing a shot. Hypersonic weapons fly fast and maneuver in ways that stress traditional missile defenses, and they are a central reason interest in new defensive architectures has surged.
On the defensive side, missile defense works in layers, trying to catch a threat during boost, midcourse, or terminal flight. The most ambitious current U.S. effort is the Golden Dome initiative, a proposed homeland shield that would lean heavily on space-based sensors and, potentially, space-based interceptors. Underpinning all of it is space domain awareness, the ability to detect, track, and characterize the tens of thousands of objects in orbit, so operators know what is a satellite, what is debris, and what might be a threat.
How to read this section
Every page here is written as a reference, not a news bulletin. We separate what has been announced from what actually exists, describe how a system works rather than hyping it, and hedge figures that change. Where a topic touches the market, such as the defense primes that build these systems or companies positioned around programs like Golden Dome, we point to the investing section rather than mixing the two. Start with the featured explainer above, or jump to whichever system you came to understand.