It is the wonderful moment when astronauts aboard the International Space Station this summer can see thin blue clouds hovering at the boundary between Earth's atmosphere and the void. This phenomenon happened at an altitude of 47 to 53 miles (76 to 85 km) where meteors and bright aurora lights are not uncommon and the atmosphere gives way to the blackness of space. The clouds have since spread from the northern latitude regions such as Scandinavia, Scotland and Siberia to areas farther south. Sightings have cropped up in Washington and Oregon in the United States as well as in Turkey and Iran.
0 comments:
Post a Comment