A Fleeting Double Eclipse of the Sun
			
		
		
			Image Credit & Copyright:  
Simon Tang
		
		
			Last week, for a fraction of a second, the Sun was eclipsed twice.
One week ago today, many people in 
North America 
were treated to a standard, single, 
partial solar eclipse.
Fewer people, all congregated along a narrow path, experienced the 
eerie daytime darkness of a total solar eclipse. 
A dedicated few with fast enough camera equipment, however, were able to capture a 
double eclipse -- a simultaneous partial eclipse of the 
Sun by both the 
Moon and the 
International Space Station (ISS).
The Earth-orbiting 
ISS crossed the Sun in less than a second, but to keep the 
ISS from appearing 
blurry, exposure times must be less than 1/1000th of a second.
The featured image composite captured the 
ISS 
multiple times in succession as it zipped across the 
face of the Sun.
The picture was taken from Huron, California in a 
specific color 
emitted by 
hydrogen which highlights the 
Sun's chromosphere, 
a layer hotter and higher up than the usually photographed 
photosphere.