Cosmic

Sky Pictures & Words

    • Rogerdier.com
  • November 22, 2025

    K-1 is Going Kaput 

    K-1 is Going Kaput 

    A rare cosmic event, a comet breaking apart, is now visible to people living in the Northern Hemisphere.

  • October 27, 2025

    Our Sweet Lemmon

    Our Sweet Lemmon

    When I was a young lad, devoid of optical instrumentation and a lot of other things cerebral, I thumbed through astronomy books and gazed at magnificent drawings of ancient comets that lit up the night time sky, and could even be seen in daylight! Imagine that! And I did. Of course, photography had advanced by…

  • October 24, 2025

    Winter is Coming

    Winter is Coming

    Indeed, winter is coming. There’s no news in this headline, but for those of use who enjoy the expanding, wide windows of night sky, winter is the best time of the year. I’m clearing leftover photos off the screen of my desktop computer and I’d thought I’d share them. On the morning of October 10,…

  • October 1, 2025

    M31: The Finest Fruit of the Autumn Sky

    M31: The Finest Fruit of the Autumn Sky

    It’s October 1, 2025, and I have finished my latest book, “John Mayasich—Immigration Roots to Olympic Gold.” It should be available on Amazon.com in a few weeks. It’s a compelling story about a truly remarkable family and their Croatian immigrant parents who raised 11 children in northern Minnesota. One child, John Mayasich, absorbed everything important…

  • March 17, 2025

    Leo’s Trio Chase the Seven Sisters

    Leo’s Trio Chase the Seven Sisters

    Hi everyone. Glad you’re still here.  Leo’s Trio is an arresting mix of galaxies which fit comfortably in the field of view of most small telescopes. On the evening of March 16, I had to slightly expand the roughly .75 by 1.25 degree field of view in the SeeStar S50 to comfortably fit the threesome…

  • February 23, 2025

    Crabbing Around the Winter Nights

    Crabbing Around the Winter Nights

    This week, on a fairly transparent night, I drove our vehicle about a half-mile out from the western shoreline of Lake Winnebago to go fishing. No, not for the prehistoric sturgeon that humans in nearby area zip codes like to hunker over and spear, savagely, through a rectangular hole in the ice, but to fish…

  • January 26, 2025

    The Rosette Returns

    The Rosette Returns

    On a recent night that would chill emperor penguins of the Antarctic, the little wonder-scope that is the SeeStar S50 stood outside our frosty family room window and went to work. Grinding away in minus 8 Fahrenheit temperatures, the S50 with its modest two-inch triple lens spent about two hours photographing the sky in a…

  • January 23, 2025

    Tourist Stops in the Winter Night Sky

    Tourist Stops in the Winter Night Sky

    Your intrepid astronomer visits more than a few astronomy sites during his infrequent online trekking. This time of year, nearly everyone who photographs the night sky has proof that they have visited popular winter sky tourists stops. Many of the modern amateur portraits are stunning. Equivalent to the American Grand Canyon, Yellowstone National Park or…

  • December 7, 2024

    Seeing All Seven of the Sisters

    Seeing All Seven of the Sisters

    The weeks zip by, quick as meteors in the night.  It’s been a while since your intrepid astronomer planted his sack of potatoes beneath the starry night. Clouds, travel, moon-washed evenings, and life all sometimes conspire to keep us from what we love doing. When the doing arrives again, cosmic serenity seeps in to remind…

  • October 24, 2024

    Nomads of the Night

    Nomads of the Night

    This Nomad of the Night is not the Comet of the Century. It’s the Comet of the Month, arriving before our eyes in late September and emerging in early October to give us a three-week visual thrill. As this modest ice-rock continues its quick fade into the cold, inky darkness, we now know that this…

  • October 16, 2024

    The Comet of the Century Arrives

    The Comet of the Century Arrives

    We are the only civilized society that will ever witness Comet Tsuchinshan-ATLAS. Comets are mysteries. We are more mysterious. Will humans evolve or devolve on our path up the stairway? It makes me wonder. 

  • October 2, 2024

    Who Really Named the Crab Nebula?

    Who Really Named the Crab Nebula?

    William Parsons, the 3rd Earl of Rosse is credited for giving the Crab Nebula its forever nickname, but that’s not true. Rosse first thought M1 was a cluster, but once he built a larger speculum-mirrored telescope, he changed his mind. Two fellows who observed with Rosse on occasion get credit for naming the Crab Nebula.…

  • September 26, 2024

    The Siren Call of a New Comet

    The Siren Call of a New Comet

    Every time your intrepid astronomer hears that a comet is coming, I get weak in the knees and head for a place where I think it will be visible. Comets have the same power over all of us who see, scan, observe and shoot photos of the sky. Comets are Sirens of the Solar System.…

  • September 14, 2024

    Reflections of Venus

    Reflections of Venus

    We have this image, but that is only part of this picture, or any picture. No one can present the pleasant odors the moment the photo was taken before that promising new day, nor can any photographer recreate the waking sounds of that end-of-night moment, gazing across the lake, amazed that the beam of Venus…

  • September 5, 2024

    Veil Discovered 240 Years Ago Today

    Veil Discovered 240 Years Ago Today

    If you are reading this on Thursday, Sept. 5, 2024, William Herschel discovered the Veil Nebula 240 years ago today. Herschel, who sometimes spent 16 grueling hours a day grinding mirrors, lived at what he called Observatory House near Slough England, 20 miles west of London. His home was located at 52.88 degrees north latitude,…

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