Posted in ifttt-photograph Tagged IFTTT, NASA Leave a comment 25 Brightest Stars in the Night Skyĭo you know the names of some of the brightest stars? It’s likely that you do, even though some bright stars have names so old they date back to near the beginning of written language. Via IFTTT Posted on Wednesday, 26 June 2019 by VGC Much about noctilucent clouds has been discovered only over the past decade, while how they form and evolve remains a topic of active research. Unusually bright noctilucent clouds continue to appear over much of northern Europe. Featured here as they appeared two weeks ago, a network of noctilucent clouds was captured not only in the distant sky but in reflection from a small lake just north of Zwolle, Netherlands, with trees in stark silhouette across the horizon.
Noctilucent clouds are the highest clouds known and thought to be part of polar mesospheric clouds. Normally too dim to be seen, they may become visible just after sunset during the summer when illuminated by sunlight from below. Under usual circumstances, a pretty sunset might be visible, but unusual noctilucent clouds float so high up they can be seen well after dark. Therefore, at sunset on the ground, sunlight still shines on clouds above. As the Earth rotates to eclipse the Sun, sunset rises up from the ground. Sometimes it’s night on the ground but day in the air. Posted in ifttt-photograph Tagged IFTTT, NASA Leave a comment Noctilucent Clouds, Reflections, and Silhouettes Via IFTTT Posted on Thursday, 27 June 2019 by VGC The trails trails climb higher as the days grow longer and the June 21st summer solstice approaches. Of course, starting in December the Sun trails peak lower in the sky, near the northern hemisphere’s winter solstice. At the end of the exposure, the paper was scanned to create the digital image. Breaks and gaps in the trails are caused by cloud cover. Fixed to a single spot at Casarano, Italy for the entire exposure, the simple camera continuously records the Sun’s daily path as a glowing trail burned into the photosensitive paper. Dubbed a solargraph, the unconventional picture was recorded with a tall, tube-shaped pinhole camera using a piece of photographic paper. This persistent six month long exposure compresses the time from solstice to solstice (Decemto June 16, 2019) into a single point of view.