"The image reveals the presence of a ubiquitous haze that covers Neptune in a semitransparent layer. Near the center of the disk, sunlight passes through the haze and deeper into the atmosphere, where some wavelengths are absorbed by methane gas, causing the center of the image to appear less red. Near the edge of the planet, the haze scatters sunlight at higher altitude, above most of the methane, causing the bright red edge around the planet. By measuring haze brightness at several wavelengths, scientists are able to estimate the thickness of the haze and its ability to scatter sunlight. The image is among the last full-disk photos that Voyager 2 took before beginning its endless journey into interstellar space." (Caption on verso.)
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Overall in very good condition with marks and wear commensurate with age and use, extremely superficial scratches would be invisible with framing, very minor 5mm crease on bottom left corner. Tape applying caption to verso.
預計金額計算機
拍品 3拍賣 21039
VOYAGER 2, AUGUST 1989A FALSE COLOUR IMAGE OF NEPTUNE估價: GBP 2,000 - 3,000