From Sunlight to Skylines: Could Space Power Earth?

Imagine you are travelling somewhere for a few months. You pack enough water for the journey, but eventually, you’ll run out. You would have to find a way to collect or produce more water along the way.

Satellites face a similar problem, except what they need is energy.

Luckily, they have a practically endless source right outside their windows: the Sun. Solar panels convert sunlight into electricity, powering everything from communication systems to scientific instruments. This is how many satellites keep themselves running for years.

Indian satellites such as IRNSS-1F and GSAT-9 use multiple-junction solar cells and deployable solar arrays to generate hundreds or thousands of watts of power. NASA spacecraft and missions use similar solar technologies, from large deployable arrays to advanced multi-junction cells.

But now, imagine taking this one step further.

What if a satellite didn’t just use solar energy for itself, but supplied that energy to Earth?

This is the idea behind Space-Based Solar Power (SBSP) : enormous solar systems in orbit would collect sunlight, convert it into electricity, and potentially transmit that energy wirelessly to receiving stations on Earth. The idea sounds futuristic, but the technologies behind it—solar power, wireless power transmission, autonomous systems and large deployable structures—are already being researched. NASA has studied what such systems could look like around 2050. 

There is something almost strange about stepping back and looking at it from an ordinary perspective.

We are using wireless technology to capture the energy of a giant ball of burning plasma, millions of kilometres away, convert it into electricity, and use it to power things on Earth.

Maybe the future of solar power isn’t just on Earth.

Maybe part of it is above us!

Check out a video related to the topic!

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