CubeSat: Little Satellite, Big Deal

Solar Sails

Solar sail technology is revolutionizing CubeSat propulsion by using sunlight instead of traditional fuel. Joe Palko explains that a solar sail is a large, thin reflective surface that captures solar radiation pressure to propel the CubeSat, much like a sailboat uses wind 1. This innovative approach allows CubeSats to change direction in space without the heavy burden of fuel, making them more efficient and versatile.

The sun is always pushing out photons, and that causes solar radiation pressure, and that pressure is constantly pushing against anything that happens to get in its way.

--- Joe Palko

The solar sail, when unfurled, is about the size of half a tennis court, yet it packs into a tiny space within the CubeSat 1.

   

Fuel Efficiency

CubeSats face significant challenges in fuel efficiency and weight management, which solar sails help to mitigate. Emily Kwong highlights that traditional propulsion requires a third of the CubeSat's mass for fuel, making direction changes costly in terms of weight 1. Solar sails offer a lightweight alternative, reducing the need for heavy fuel and enabling more agile maneuvers in space.

You have to use almost a third of the mass of this cubesat for fuel. So changing direction is the real expensive part of flying around in space in terms of weight.

--- Joe Palko

This advancement not only enhances the CubeSat's operational capabilities but also expands the potential for deep space exploration 1.