All-sky images of aurora

Two digital SLRs (single-lens reflex cameras), equipped with fisheye lenses and GPS units, captured these two simultaneous all-sky images of aurora in Alaska, USA. The subtle differences between the left and right pictures allow researchers to measure the altitude where electrons in the atmosphere emit the light that produces aurora.

Credit: Kataoka et al., 2013

• Using digital SLRs to measure the height of Northern Lights (6 September 2013)

• Original image (1.1 MB, 6384.0x3192.0 px)
• Preview image (17.1 KB, 1280x640 px, JPEG format)

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