Solar eclipse of August 12 triggers scientific study and rare ISS sighting

A total solar eclipse on August 12, 2026, has prompted both scientific research and rare astronomical sightings. In Spain, the eclipse was total, while in regions like Orne, France, the moon blocked approximately 93% of the sun's light.

Researchers have launched the SOLARIS project to study the physiological effects of the eclipse. Led by the Catalonia Government's Research and Universities Department in collaboration with the Vall d’Hebron Institute of Research and the Institute of Space Studies of Catalonia, the study uses smartwatches and the SOLARIS app to monitor participants' heart rates and breathing. The goal is to determine if sudden darkness and temperature drops cause measurable changes in human biology.

Simultaneously, NASA photographer Joel Kowsky captured a rare image of the International Space Station (ISS) silhouetted against the sun during the event. The ISS, traveling at approximately 28,000 km/h, was visible as it transited the solar disk. Astronauts aboard the station, including Sophie Adenot, Jessica Meir, and members of the Expedition 75 crew, also observed the phenomenon from orbit.