Every era of exploration has been defined by a new source of power. Wind carried ships across oceans. Steam connected continents. Electricity transformed cities and fueled the industrial age.

Today, humanity stands at the beginning of another transition, one that will give explorers the freedom to operate beyond Earth for weeks, months, and eventually years at a time. That freedom begins with energy.

Whether supporting a rover traversing the lunar surface, a habitat operating through the Moon’s two-week night, or a spacecraft traveling to Mars, reliable power determines what is possible. Without it, communications stop, scientific instruments fall silent, mobility ends, and exploration comes to a halt.

For decades, NASA’s Glenn Research Center in Cleveland has quietly developed many of the technologies that make spaceflight possible. Its expertise spans power generation, propulsion, communications, thermal management, and testing. As one saying around the center reflects, “Nothing can fly without power, propulsion, or communications.”

Today, that experience is helping build the energy infrastructure that will support humanity’s next great frontier.

From Exploration to Permanent Operations

The first sixty years of spaceflight focused on reaching new destinations. The next sixty years will focus on staying there.

As NASA and its commercial partners prepare for sustained operations on the Moon and eventually Mars, energy is becoming far more than another spacecraft subsystem. It is becoming infrastructure.

“Our sustained operations really drive the need for nuclear,” explained Lindsay Kaldon, project manager for NASA’s SR-1 Freedom Nuclear Power Module.

Solar arrays and batteries remain essential parts of future missions, but they also have limits. The Moon experiences nearly fourteen days of darkness during each lunar night, while permanently shadowed craters never receive sunlight at all. Future explorers need the freedom to work where the science, resources, and mission objectives take them rather than only where sunlight is available.

Reliable, continuous power provides that freedom.

Freedom Through Power

NASA’s SR-1 Freedom mission represents the nation’s first planned nuclear fission-powered spacecraft since SNAP-10A launched in 1965. Scheduled to launch in late 2028, the mission will demonstrate nuclear electric propulsion while validating technologies that support future exploration beyond Earth orbit.

The significance of SR-1 extends well beyond a single spacecraft or a single mission.

This mission serves as a stepping stone toward Lunar Reactor-1 (LR-1), NASA’s planned fission surface power system designed to provide continuous electricity for future lunar operations. Together, these efforts represent the beginning of a broader energy architecture that supports transportation, science, communications, manufacturing, and eventually permanent settlements.

As Kaldon described it, nuclear power simply gives future explorers “more tools in the chest.”

Those additional tools create new opportunities.

Instead of designing every mission around daylight, future planners gain the flexibility to operate continuously, support larger scientific payloads, expand industrial activities, and explore regions that were previously difficult to access.

Power creates capability.

Reliable power creates freedom.

Building an Energy Ecosystem

Generating electricity is only one piece of the challenge.

Future lunar infrastructure will depend on an interconnected system that includes energy generation, storage, distribution, propulsion, thermal management, communications, advanced materials, autonomous systems, and radiation protection. Each technology strengthens the others, creating an ecosystem capable of supporting increasingly complex operations.

As human activity expands, so will energy demand.

Scientific laboratories, communications networks, autonomous vehicles, resource extraction, manufacturing facilities, and future habitats will all require dependable electrical power. Nuclear systems provide one pathway for scaling from today’s kilowatt-class missions toward the megawatt-class infrastructure needed to support a working Moon.

Just as electrical grids enabled cities to grow on Earth, integrated energy systems will enable communities beyond it.

Innovation That Benefits Earth

Many technologies developed for space ultimately improve life here at home.

Advanced materials capable of surviving extreme temperatures and radiation environments can strengthen terrestrial energy systems. Long-life components developed for lunar missions improve reliability for industries on Earth. Even the growing interest in small modular reactors mirrors many of the engineering challenges NASA is solving for space.

As humanity learns to power communities beyond Earth, those advances continue finding applications that improve life on the planet where the journey began.

The Freedom to Build

Building a permanent presence beyond Earth requires far more than launching rockets.

It requires dependable transportation, resilient communications, advanced manufacturing, sustainable habitats, and above all, reliable energy. Every one of those systems depends on power.

The first era of space exploration proved humanity could reach the Moon and Mars. The next era will be defined by what we build there in our next step of exploration.

That future begins with the power of freedom: the ability to explore farther, operate longer, and create the infrastructure that allows humanity to live and work beyond Earth.