Astronauts on board the International Space Station (ISS) observed a unique phenomenon – “fireworks” in space – during their recent week-long stay. Expedition 73 crew member Nichole Ayers captured the moment on social media, describing it as a transient luminous event (TLE), triggered by intense electrical activity in thunderstorms.
Ayers’ observation was part of various research activities conducted by the Expedition 73 crew. These included:
* Studying “Earthshine” – a phenomenon where the reflection of our planet’s light bounces off the lunar surface
* Investigating muscle degradation due to prolonged spaceflight using electrical stimulation
* Measuring blood flow from the brain to the heart using electrodes on their necks and chests
The Russian side of the station also conducted research, including:
* Capturing hyperspectral imagery of landmarks in Mexico and South America
* Testing virtual reality specs for adapting to microgravity
Meanwhile, Axiom Mission 4 (Ax-4) crew members worked on various projects, including cancer research, studying algae growth, and monitoring radiation levels. The team also participated in outreach activities, connecting with aspiring astronauts from around the world.
As of July 4, there are 11 people aboard the ISS, with three docked crew spacecraft and one docked cargo spacecraft. The space station has been continuously crewed for nearly 25 years, marking a significant milestone in human spaceflight history.
Source: https://www.space.com/space-exploration/international-space-station/seeing-fireworks-on-earth-from-space-on-the-iss-this-week-june-26-july-4-2025