Earth observation taken from the International Space Station

            An Earth observation taken from the International Space Station during a day pass. Also in view is the Cygnus cargo spacecraft, which arrived on Dec. 9, carrying science and other supplies.

Astronaut Scott Kelly and Russian cosmonaut Mikhail Kornienko completed comprehensive testing for their Ocular Health suite of exams, which comprise vision testing, blood pressure, tonometry (determining the fluid pressure inside the eye), and ocular and cardiac ultrasound. Kelly and Kornienko also completed their fundoscopy (retinal imagery) and Optical Coherence Tomography exams, non-invasive imaging using light waves to take high-resolution pictures of the retina that are used to diagnose or monitor eye conditions.

These tests are essential for the crew, as spaceflight has an impact on their bodies, and some experience impaired vision. The Ocular Health tests gather data on crew members' visual health during and after long-duration space station missions. Ongoing tests are crucial to understand how living in microgravity can affect the visual, vascular and central nervous systems, and to inform future research.

Credits: NASA

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Taken on: December 24, 2015

Tags:

ISS

International Space Station

Earth from Space

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Sets appears in: • Views from the International Space Station • Earth more » • Most Viewed Images of 2016 « less

Camera: Nikon D4, f/11.0, 1/500 sec, 50mm, ISO 400 (more info) (hide info)

Camera:	Nikon D4
Lens:	50.0-500.0 mm f/4.5-6.3
Aperture:	f/11.0
Exposure Time:	0.002 sec (1/500)
Focal Length:	50mm
ISO:	400
Exposure Bias:	+2/3 EV
Flash:	No Flash
Exposure Program:	Program AE
Exposure Mode:	Auto
Metering Mode:	Multi-segment
White Balance:	Auto
Gain Control:	Low gain up
Sharpness:	Hard
Color Space:	sRGB
Software:	Adobe Photoshop CC 2014 (Windows)
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