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a blog by markus nolf

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change in relative sunset position between 13 july and 27 november.
photo

photo: sunset positions in summer and winter

2020-12-012020-12-01 markus

the change in relative sunset position over the months is crazy! photos were taken on july 13 and november 27, so about three weeks after/before summer/winter solstice. that means the […]

inside the gran telescopio canarias - primary and secondary mirrors
photo

inside the gran telescopio canarias [360 photo]

2019-03-052019-03-03 markus

the gran telescopio canarias is a telescope on the top of la palma, in the canary islands. it features a 10.4 m diameter primary mirror, making it the world’s largest […]

mountain panorama: salfeinssee and kalkkögel, tirol, austria
random photos

mountain panorama: salfeinssee and kalkkögel

2018-12-062018-12-02 markus

by itself, salfeinssee (or salfeiner see) near kemater alm (senderstal) is just a little, unspectacular body of water somewhere in the mountains of tirol. in calm weather, however, the shallow […]

hdr panorama: sunrise at kelimutu volcano, flores, indonesia
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sunrise at kelimutu volcano, flores [panorama, time lapse]

2018-12-022018-11-24 markus

there aren’t many valid reasons to get up early, let alone before sunrise. watching the sun rise from the top of kelimutu volcano (flores, indonesia) at 06:00 a.m., however, is […]

champagne pool, wai-o-tapu thermal wonderland, rotorua, new zealand
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champagne pool, rotorua [360 photo]

2018-11-142018-11-11 markus

champagne pool is a large, hot water spring in wai-o-tapu thermal wonderland, rotorua, new zealand. the pool is fed with hot water (230°c) by a deep conduit, which cools down […]

australian giant cuttlefish (sepia apama) changing shape and colours
nature

an australian giant cuttlefish changes colour and shape [video]

2017-06-262019-08-06 markus

cuttlefish are amazing creatures! here’s some footage of one of the resident australian giant cuttlefish (sepia apama) at bass point, shellharbour. it changes not just colour, but also forms seaweed-like […]

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