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1000 results for “JanPV”

  1. A reminder that, in late May, the N hemisphere noctilucent cloud season starts again.

    Best time throughout the season is from local midnight towards dawn, looking N-NE, typically around 15 degrees above a clear horizon, but sometimes much higher.

    Deep twilight evening displays, (N/NW) are common, but a cold atmospheric tide means they are more likely in the post-midnight period. Not visible at day.

    The season closes early-mid August. Climate may be extending the season.

    #nlc #space #weather

  2. A reminder that, in late May, the N hemisphere noctilucent cloud season starts again.

    Best time throughout the season is from local midnight towards dawn, looking N-NE, typically around 15 degrees above a clear horizon, but sometimes much higher.

    Deep twilight evening displays, (N/NW) are common, but a cold atmospheric tide means they are more likely in the post-midnight period. Not visible at day.

    The season closes early-mid August. Climate may be extending the season.

    #nlc #space #weather

  3. The original account of the "Angel of Mons" during WW1 is quite detailed and can fairly be concluded to have been an early sighting of noctilucent clouds. Similar reports, from WW2, also strongly hint at NLC ('harps' in the sky).

    #nlc #clouds #weather #astronomy #sky #history

  4. The original account of the "Angel of Mons" during WW1 is quite detailed and can fairly be concluded to have been an early sighting of noctilucent clouds. Similar reports, from WW2, also strongly hint at NLC ('harps' in the sky).

    #nlc #clouds #weather #astronomy #sky #history

  5. 02:12UT, July 13, 2025.

    Much warmer than the previous early morning. Venus, shrouded in noctilucent clouds (at minus 125 degrees C!), heralding the coming of one more day of soul-draining heat, hopefully the last.

    #nlc #noctilucentclouds #astronomy #skyscape #clouds

  6. 02:12UT, July 13, 2025.

    Much warmer than the previous early morning. Venus, shrouded in noctilucent clouds (at minus 125 degrees C!), heralding the coming of one more day of soul-draining heat, hopefully the last.

    #nlc #noctilucentclouds #astronomy #skyscape #clouds

  7. I've been observing noctilucent clouds for ~30 years. This was one of the brightest I've seen in that time.

    As the lower atmosphere warms, the middle atmosphere where NLC form (~82km) gets colder. NLC are found to be getting progressively brighter as a result and have long been said to be the 'canary in the coal mine' of climate change.

    2025 June 23, 01:52UT, 6-image stitch.
    ISO160, f/4.8, 8s. FoV ~90 degrees. Nikon D80.

    #space #weather #clouds #noctilucent #NLC #climate #meteorology