Nuit agitee au-dessus des telescopes Magellan
			
		
		
		
			The night sky is always changing. 
Featured here 
are changes that occurred over a six hour period in late 2014 June behind the dual 6.5-meter 
Magellan Telescopes at 
Las Campanas Observatory in 
Chile.
The initial red glow on the horizon is 
airglow, 
a slight cooling of high air by the emission of 
specific colors of light.
Bands of airglow 
are also visible throughout the time-lapse video.
Early in the night, car headlights flash on the far left. 
Satellites 
quickly shoot past as they 
circle the Earth and reflect sunlight.
A long and thin cloud passes slowly overhead. 
The Small Magellanic Cloud rises on the left, 
while the expansive central band of our 
Milky Way Galaxy 
arches and pivots as the 
Earth rotates. 
As the night progresses, 
the Magellan telescopes swivel and stare as they explore 
pre-determined patches of the night sky.
Every night, 
every sky changes differently, 
even though the phenomena at play are usually the same.