Rockets

NASA’s New Solar Sail Has Launched and Will Soon Deploy

Solar Sails are an enigmatic and majestic way to travel across the gulf of space. Drawing an analogy to the sail ships of the past, they are one of the most efficient ways of propelling craft in space. On Tuesday a RocketLab Electron rocket launched NASA’s new Advanced Composite Solar Sail System. It aims to test the deployment of large solar sails in low-earth orbit and on Wednesday, NASA confirmed everything is looking good for sail deployment

In 1886 the motor car was invented. In 1903 humans made their first powered flight. Just 58 years later, humans made their first trip into space on board a rocket. Rocket technology has changed significantly over the centuries, yes centuries. The development of the rocket started way back in the 13th Century with the Chinese and Mongolians firing rocket propelled arrows at each other. Things moved on somewhat since then and we now have solid and liquid rocket propellant, ion engines and solar sails with more technology in the wings. 

A SpaceX Falcon 9 rocket rises from its Florida launch pad to send Intuitive Machines’ Odysseus moon lander spaceward. (NASA via YouTube)

Solar sails are of particular interest because they harness the power of sun, or star light to propel probes across space. The idea isn’t knew though, Johannes Kepler (of planetary motion fame) first suggested that sunlight could be used to push spacecraft in the 17th Century in his works entitled ‘Somnium’. We had to wait until the 20h Century though before Russian scientist Konstantin Tsiolkovsky outlined the principle of how solar sails might actually work. Carl Sagan and other members of the Planetary Society start to propose missions using solar sails in the 70’s and 80’s but it wasn’t until 2010 that we saw the first practical solar sail vehicle, IKAROS.

Image of the fully deployed IKAROS solar sail, taken by a separation camera. Credit: JAXA

The concept of solar sails is quite simple to understand, relying upon the pressure of sunlight. The sails are angled such that photons strike the reflective sail and bounce off it to push the spacecraft forward. It does of course take a lot of photons to accelerate a spacecraft using light but slowly, over time it is a very efficient propulsion system requiring no heavy engines or fuel tanks. This reduction of mass makes it easier for solar sails to be accelerated by sunlight but the sail sizes have been limited by the material and structure of the booms that support them. 

NASA have been working on the problem with their Next Generation Solar Sail Boom Technology. Their Advanced Composite Solar Sail System uses a CubeSat built by NanoAvionics to test a new composite boom support structure. It is made from flexible polymer and carbon fibre materials to create a stiffer, lighter alternative to existing support structure designs. 

On Wednesday 24 April, NASA confirmed that the CubeSat has reached low-Earth orbit and is about to deployed the 9 metre sail. They are now powering up the probe and establishing ground contract. It will take about 25 minutes to deploy the sail which spans 80 square metres. If the conditions are right, it may even be visible from Earth, possibly even rivalling Sirius in brightness. 

Source : Solar Sail CubeSat Has Deployed from Rocket

Mark Thompson

Recent Posts

Only Hubble Could Make this Measurement of a Supernova

Calculating the distance to far-away objects, such as galaxy clusters and quasars, is difficult. But…

4 hours ago

Dune-Inspired Stillsuits Could Allow Astronauts to Recycle Their Urine Into Water

If history has taught us one thing, it is that science fiction often gives way…

20 hours ago

A Walking Balloon Could One Day Explore Titan – Or Earth’s Sea Floor

Novel ways to move on other celestial bodies always draw the attention of the space…

1 day ago

Webb Completes Its Second Year of Operations

What happens when a spiral and an elliptical galaxy collide? To celebrate the second anniversary…

2 days ago

Galaxies Regulate their Own Growth so they Don’t Run Out of Star Forming Gas

Look at most spiral or barred spiral galaxies and you will see multiple regions where…

3 days ago

Mapping the Stars in a Dwarf Galaxy to Reveal its Dark Matter

Dark matter is curious stuff! As the name suggests, it’s dark making it notoriously difficult…

3 days ago