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Ghostly Sun, 2017 (digital photo)

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IMAGE number

MMM7340934

Image title

Ghostly Sun, 2017 (digital photo)

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Medium

digital photograph

Date

2017 AD (C21st AD)

Dimensions

36.1x40.6 cms

Image description

Creator: Michael Wilkinson This is an image of the sun in Calcium-K light, showing the inner chromosphere. 400 out of 4000 frames are stacked using AutoStakkert!2, sharpened with ImPPG, and added pseudo-colour using curves in GIMP. In the pseudo-colour scheme used, the surface is shown as negative, with the sunspots as bright spots, the area outside the limb is shown in enhanced contrast, highlighting a surge on the western limb, and several small prominences. Despite the sun going into a quieter phase, there is still a lot of activity. Born digital photograph entitled 'Ghostly Sun' by Michael Wilkinson taken in Groningen Province, Netherlands on 4th April 2017. Taken with APM 80 mm f/6 refractor telescope, Vixen Great Polaris mount, ZWO ASI178MM camera, stack of 400 frames. Highly Commended in Our Sun category of Astronomy Photographer of the Year 2017.

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Photo credit

© National Maritime Museum, Greenwich, London / Bridgeman Images

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Largest available format 4800 × 4267 px 8 MB
Dimension [pixels] Dimension in 300dpi [mm] File size [MB]
Large 4800 × 4267 px 406 × 361 mm 7.9 MB
Medium 1024 × 911 px 87 × 77 mm 965 KB

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