May 18, 2024
space-based power station
The U.K.-based startup Space Solar has unveiled a pioneering technology that could redefine the future of space-based power stations.

In a groundbreaking demonstration, the U.K.-based startup Space Solar has unveiled a pioneering technology that could redefine the future of space-based power stations. The company successfully tested a specialized beaming device capable of wirelessly transmitting power in a 360-degree radius. This innovation holds profound implications for the development of space-based power stations, particularly in addressing the dynamic positioning challenges posed by Earth’s rotation.

Virtus Solis, led by former SpaceX rocket engineer John Bucknell, made waves at the International Conference on Energy from Space in London with the introduction of their revolutionary solar power beaming concept. Held on Wednesday, April 17, 2024, the conference provided a platform for innovators like Virtus Solis to showcase groundbreaking technologies aimed at transforming the future of energy generation and distribution.

At the heart of Virtus Solis’ presentation was their pioneering approach to solar power beaming, a concept that holds immense promise for addressing the challenges associated with traditional solar energy generation methods. Unlike conventional photovoltaic systems, which rely on direct sunlight to generate electricity, Virtus Solis’ technology leverages advanced beaming systems to wirelessly transmit solar power to Earth from space.

The concept of solar power beaming is not new, but Virtus Solis’ approach represents a significant leap forward in terms of efficiency, scalability, and practicality. By harnessing the virtually limitless energy potential of the sun in space, Virtus Solis aims to overcome the limitations imposed by factors such as weather, nighttime darkness, and geographical location, thereby providing a consistent and reliable source of clean energy to communities around the globe.

John Bucknell’s background as a former SpaceX engineer brings a wealth of expertise and insight to Virtus Solis, positioning the company at the forefront of innovation in the space and energy sectors. Drawing on his experience in rocket engineering and space exploration, Bucknell and his team have developed a solar power beaming concept that promises to revolutionize the way we harness and utilize solar energy.

The unveiling of Virtus Solis’ technology at the International Conference on Energy from Space signals a pivotal moment in the journey towards a sustainable energy future. As the world seeks to transition away from fossil fuels and embrace renewable energy sources, innovative solutions like solar power beaming offer a glimpse into what the future may hold.

Moving forward, Virtus Solis will continue to refine and develop their technology, with the ultimate goal of bringing space-based solar power within reach in the not-too-distant future. With visionaries like John Bucknell leading the way, the possibilities for transforming our energy infrastructure and mitigating the impacts of climate change are limited only by our imagination.

Virtus Solis is poised to revolutionize the future of energy generation with its ambitious plan to construct giant photovoltaic arrays in orbit around Earth. These arrays, spanning up to 0.6 miles (1 kilometer) across, will be assembled by robots using modular components measuring 5.3 feet (1.6 meters) in width. The groundbreaking project envisions the deployment of hundreds of such modules, with the assistance of SpaceX’s Starship, into the Molniya orbit—a highly elliptical path characterized by its unique orbital dynamics.

Molniya orbit

Situated at a distance ranging from 500 miles (800 km) to 22,000 miles (35,000 km) above Earth’s surface, the Molniya orbit offers a strategic vantage point for Virtus Solis’ solar power initiative. Despite taking approximately 12 hours to complete a single orbit around the planet, spacecraft traversing this orbit spend over 11 hours in the most distant region, affording an unparalleled view of nearly an entire hemisphere. This extended dwell time in the distant region is pivotal for harnessing solar energy efficiently and continuously.

John Bucknell, the visionary mind behind Virtus Solis, highlights the transformative potential of this orbital infrastructure. By strategically positioning constellations of two or more solar arrays in the Molniya orbit, Virtus Solis aims to provide constant “baseload power” to specific regions on Earth. This revolutionary approach ensures a reliable and uninterrupted supply of energy, mitigating the intermittency issues associated with traditional renewable sources like solar and wind power.

Molniya orbit

Moreover, Bucknell envisions a global network comprising 16 such arrays, capable of delivering clean energy to every corner of the world. Through the transmission of energy in the form of microwaves to massive receiving antennas stationed on the ground, Virtus Solis seeks to realize its vision of a sustainable energy ecosystem on a planetary scale.

The implications of Virtus Solis’ orbital solar power initiative extend far beyond mere technological innovation. By harnessing the virtually limitless energy resources of space, the company is poised to address the pressing challenges of climate change, energy security, and sustainable development. As humanity stands at the threshold of a new era in space exploration and renewable energy, Virtus Solis stands as a beacon of hope, illuminating the path towards a brighter and more sustainable future for generations to come.

The significance of this achievement cannot be overstated, as it marks a critical milestone in the realization of the CASSIOPeiA space-based solar power plant concept, spearheaded by Space Solar. Unlike conventional power stations tethered to terrestrial constraints, CASSIOPeiA harnesses the infinite potential of space to generate gigawatts of clean energy. Central to this vision is the seamless adaptability of the beaming device, which ensures uninterrupted power transmission despite the orbital dynamics dictated by Earth’s rotation and its orbit around the sun.

The implications of Space Solar’s breakthrough extend far beyond the realm of conventional energy generation. By leveraging space-based infrastructure, CASSIOPeiA promises to revolutionize the global energy landscape, offering a sustainable and efficient alternative to traditional fossil fuel-dependent systems. With the capacity to deliver clean energy on a scale previously unimaginable, this ambitious project represents a pivotal step towards mitigating climate change and securing a brighter, more sustainable future for generations to come.

Moreover, the potential applications of wireless power transmission extend beyond the confines of terrestrial and space-based infrastructure. From powering satellites and spacecraft to enabling remote exploration and colonization efforts, Space Solar’s innovation opens doors to a myriad of possibilities that were once relegated to the realm of science fiction.

Looking ahead, the successful demonstration of the beaming device underscores the immense potential of collaboration between innovative startups, governmental agencies, and private enterprises in driving technological advancements and shaping the future of space exploration and sustainable energy. As Space Solar continues to refine its technology and progress towards the realization of the CASSIOPeiA project, the boundaries of what is achievable in space-based energy generation are being pushed ever further, ushering in a new era of possibility and potential.

Elon Musk’s Space-X Starship

Elon Musk’s Starship is a key component of SpaceX’s ambitious plans for space exploration and colonization. Starship is a fully reusable spacecraft designed for a variety of missions, including crewed missions to the Moon and Mars, satellite deployment, and even point-to-point travel on Earth.


The Starship system consists of two stages: the Starship spacecraft itself, which is designed to carry passengers and cargo, and the Super Heavy booster, which provides the necessary thrust to propel the Starship into orbit. Both stages are powered by SpaceX’s Raptor engines, which use methane and liquid oxygen as propellants.

One of the most notable features of Starship is its reusability. SpaceX’s goal is to drastically reduce the cost of space travel by making both stages fully reusable, allowing for rapid turnaround between launches and significantly lowering the cost per kilogram to orbit. observes:

“SpaceX promises that once Starship is fully up and running, it will cost as little as $10 per kilogram to loft satellites to space. Although that estimate might be a little too optimistic, Bucknell says that once the cost of launch into low Earth orbit falls below $200 per kilogram, space-based solar power will become cheaper than Earth-based nuclear plants or gas and coal-fired power stations.”

Elon Musk envisions Starship as a means to enable human colonization of Mars, with the spacecraft capable of carrying up to 100 passengers on interplanetary voyages. SpaceX has conducted numerous test flights of Starship prototypes at its facilities in Texas, with the ultimate goal of achieving fully operational and crewed missions to Mars in the coming years.

Overall, Starship represents a bold and ambitious vision for the future of space exploration, with the potential to revolutionize our ability to travel and inhabit other worlds beyond Earth.

Why Space-based Power Station?

The reliance on Earth-based photovoltaic panels as the cheapest source of electricity, priced at less than $30 per megawatt-hour, underscores the significant progress made in renewable energy technology. However, the inherent intermittency of solar power, exacerbated by the absence of sunlight during the night, presents a formidable challenge for energy experts striving to ensure a consistent and reliable power supply.

Indeed, addressing the intermittency issue has been a longstanding concern in the transition towards renewable energy sources. While advancements in energy storage technologies, such as batteries, offer a promising solution, they have yet to fully bridge the gap in compensating for the nightly drop in solar power generation.

Consequently, conventional power sources, including nuclear, gas, and coal-fired plants, continue to play a crucial role in providing baseload power to meet demand during periods of low renewable energy output. However, the reliance on fossil fuel-based plants comes at a significant environmental cost, contributing to greenhouse gas emissions and exacerbating climate change.

As the world grapples with the urgent need to mitigate climate change and transition towards a low-carbon future, the imperative to phase out gas and coal-fired plants becomes increasingly pressing. This necessitates a concerted effort to accelerate the adoption of renewable energy sources and implement policies that incentivize their deployment while simultaneously investing in grid modernization and energy storage infrastructure.

The transition away from fossil fuels towards renewable energy sources is not only imperative for achieving emission reduction goals but also presents an opportunity to revolutionize the global energy landscape, fostering economic growth, job creation, and environmental sustainability.

By leveraging a diverse portfolio of renewable energy technologies, including solar, wind, hydroelectric, and geothermal power, coupled with advancements in energy storage and grid management systems, we can create a resilient and sustainable energy ecosystem capable of meeting the world’s growing energy demands while safeguarding the health of our planet for future generations.

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