Skip to main content

Astronauts deploy a second new solar array for the International Space Station

Astronauts are making progress on upgrading the power system for the International Space Station (ISS), recently completing a spacewalk to install a second new solar array.

Astronauts Thomas Pesquet of the European Space Agency (ESA) and Shane Kimbrough of NASA stepped outside the space station at 1:45 p.m. ET on Friday, June 25, and deployed the new solar array. With preparations and checks, the spacewalk took 6 hours and 45 minutes in total, but the deployment of the array took only around 10 minutes, and the new array began generating power straight away.

Recommended Videos

This time-lapse shows the second iROSA, or roll-out solar array, unrolling after installation by @astro_kimbrough and @Thom_astro during their spacewalk. The actual unraveling took just 10 minutes and concluded at 1:55 EDT.

👨‍🚀👨‍🚀 Details: https://t.co/1eYY4qreKs pic.twitter.com/n9sZuv04gD

— NASA's Johnson Space Center (@NASA_Johnson) June 25, 2021

Please enable Javascript to view this content

This array, called an ISS Roll-Out Solar Array (iROSA), is one of six to be deployed as part of a long-term project to upgrade the space station’s power system. Some of the current solar arrays in use on the station are up to 20 years old, older than the 15-year life they were originally intended for. These older arrays are still functioning but the amount of power they generate is slowly dropping over time. The new arrays are smaller than the current arrays, but they generate the same amount of power because they are more efficient.

The 60-foot-long roll out solar arrays were successfully deployed in a process that took about 10 minutes.
The 60-foot-long roll-out solar arrays were successfully deployed in a process that took about 10 minutes. NASA TV

“The new solar array is positioned in front of the current solar array on the same plane and rotary joints, but not directly on top of the primary solar arrays,” NASA writes. “The new arrays are 60 feet long by 20 feet wide (18.2 meters by 6 meters) and will shade a little more than half of the original array, which is 112 feet long by 39 feet wide. Each new iROSA will produce more than 20 kilowatts of electricity, while the current arrays generate, on average, 17 to 23 kilowatts each.”

Spacewalkers (from left) Shane Kimbrough and Thomas Pesquet work to install new roll out solar arrays on the International Space Station’s P-6 truss structure on June 16, 2021.
Spacewalkers (from left) Shane Kimbrough and Thomas Pesquet work to install new roll-out solar arrays on the International Space Station’s P-6 truss structure on June 16, 2021. NASA TV

The same two astronauts performed several other spacewalks recently, including installing the first new solar array last week. The two must be well used to working with each other by now, as they have completed a total of five spacewalks together — three so far on their current mission, and two previous spacewalks during a previous mission in 2017 when they replaced the station’s older nickel-hydrogen batteries with new lithium-ion batteries.

Georgina Torbet
Georgina has been the space writer at Digital Trends space writer for six years, covering human space exploration, planetary…
Gorgeous James Webb Space Telescope images land on new U.S. stamps
A new USPS stamp featuring an image taken by the James Webb Space Telescope.

In a mark of its huge impact on the world of science and astronomy, NASA’s James Webb Space Telescope finds itself once again as the inspiration for a new set of stamps from the United States Postal Service (USPS).

Two new stamps issued this month feature iconic images captured by Webb, one of them showing a spiral galaxy called NGC 628. “Webb’s observations combine near- and mid-infrared light to reveal glowing gas and dust in stark shades of orange and red, as well as finer spiral shapes with the appearance of jagged edges,” NASA said of the image (below), adding that the galaxy is located 32 million light-years away in the Pisces constellation.

Read more
How astronauts stay fit and healthy in space
iss-olympics

Space is not an easy environment to live in. Going to space and living in microgravity for extended periods has a range of effects on the body, from space sickness similar to motion sickness, to deteriorating eye sight, to fluids pooling in the upper half of the body. And though weightlessness allows astronauts to spin, rotate, and float through the air, it has a downside. Without the force of gravity to fight against, muscles of the body begin to deteriorate as they aren't used regularly.

To work against this loss of muscle and bone mass, astronauts have to exercise for up to an hour every day. And scientific investigation into how to protect human health in space is one of the key goals of work on the International Space Station, with a range of experiments being performed there to assess health and wellbeing in space.

Read more
Astronaut’s stunning Earth photo looks like ‘arteries in your retina’
Betsiboka estuary.

NASA astronaut Don Pettit has captured another remarkable shot, this one showing the Betsiboka River estuary in Madagascar.

“Betsiboka river in Madagascar, remind me of the arteries in your retina,” Pettit said in a post accompanying the image that he captured from the International Space Station (ISS) some 250 miles above Earth.

Read more