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  • Amateur Astronomy

    Posted by Michael Hiteshew on January 23rd, 2016 (All posts by )

    Astro

    I first got interested in astronomy when I was a child. Visiting one of my father’s brothers and his wife one night with my family, I got bored and amused myself playing pool in their basement. Bored with even that, I rifled a bookcase and found a book on the Messier Objects. I remember being sprawled on the floor fascinated that such things even existed, much less we had photos of them taken through telescopes. Being prior to the Voyager missions, even the planets were still grainy, poorly resolved objects, so this was a great revelation to me. These days, anyone with access to the internet can view the photo catalogs from the HST, the Spitzer IR Telescope, as well as images from the great European and American observatories.

    Charles Messier was 14 in 1744 when a six-tailed comet made an appearance in the skies over France. Fascinated, he spent the rest of his life searching for comets and in the process stumbled onto lots of objects that, in crude 18th century telescopes, might at first be mistaken for one, having that same hazy, glowing look that a comet has. Angry that he kept wasting valuable comet hunting time tracking fuzzy little clouds of light that never moved, all of which were then called nebula (cloud or mist), he resolved to start recording their positions on the sky and making the list, now known as Messier’s Catalog, available to others for their convenience.

    Ironically, the objects in Messier’s list of nebulae turned out to be far more interesting than comets. As telescopes improved in optical quality and got larger, those nebulae got resolved into spiral galaxies, elliptical galaxies, faint open star clusters, globular star clusters now known to be in orbit around our galaxy, clouds of hydrogen and oxygen in which UV light from nearby stars excites them to fluoresce, and the glowing remnants of recent supernova explosions.

    For those interested in exploring the sky on their own, the first piece of equipment you should own is binoculars, preferably 7×50 or 10×50, and a book that teaches you to find your way around the sky. You cannot do better than start with 365 Starry Nights. The author, Chet Raymo, is Professor Emeritus of Physics at Stonehill College and the author of a dozen books. He is also an artist, a naturalist and a religious scientist who believes there’s both beauty and purpose to life and the universe. The book assumes it’s been received as a Christmas present, and begins with a view of the night sky as seen from the northern hemisphere on January 1st. He explains what you’re seeing through beautifully rendered diagrams of the stars, explains how to find other things in relation to those constellations, then describes some interesting objects inside each one. Each night a little more detail is added and the diagrams slowly change with the seasons. It’s probably the most beautiful, poetic, yet informed and useful book on navigating and understanding the night sky I’ve ever seen.

    A very nice set of basic but good quality binoculars can be purchased online at Orion Telescopes & Binoculars. This $100 pair of 7×50 binoculars have BAK-4 glass in their prisms and multicoated optics. They’re an excellent yet inexpensive instrument for going beyond naked-eye viewing but still offering wide field views of star clusters, the Milky Way, and brighter Messier Objects. Orion has a stellar reputation for customer service and, being owned and run by amatuer atronomers, will gladly work with a beginner and make recommendations or work to resolve equipment problems.

    Two other basic pieces of relatively high quality yet affordable entry level equipment are an 8″ or 10″ dobsonian reflector and/or a 3″-4″ refractor. Both are easy to set up, easy to use, and can provide hours of fun. Of the two, you will always get more bang for the buck with a reflector simply because they are easier to produce, both optically and mechanically. That said, a high quality refractor provides very crisp, high contrast images and are generally smaller and more portable. You milage may vary.

    10″ “Go-To” Dobsonian Telescope

    Celestron Omni XLT 102 Refractor Telescope

    Orion ED80T CF

    Some excellent books for a the backyard astronomer include Nightwatch, a general introduction to amatuer astronomy and equipment and Turn Left at Orion a book that concentrates on helping you locate objects for binoculars and small telescopes.

    Years ago, my youngest daughter and I traveled through Arizona and Utah together. If you never been under desert skies at night you’ve never seen a night sky in all its splendor. The Milky Way is a stream of stars from horizon to horizon, like a river of sparkling light overhead. In and around the Milky Way, stars are so dense it’s almost impossible to pick out constellations, simply because so many stars normally washed out into the background are brilliantly visible. Nebulae and star clusters are visible to the naked eye and are spectacular in binoculars. We spent several nights parked out in the wilderness sky watching from the back of our Jeep Cherokee while Jewel played on the CD player inside. That same daughter and I spent a wonderful night near Gettysburg watching a Perseid meteor shower from my Mustang convertible. Astronomy is something you can certainly enjoy alone, but it’s even better if you can find someone to share it with.

    The Deep Sky Videos channel from the astronomers at University of Nottingham.

    NASA’s Great Observatories

     

    14 Responses to “Amateur Astronomy”

    1. Grurray Says:

      The big astronomy news this week was the possible discovery of the long theorized Planet X.

      Maybe someday they’ll finally find the fabled dark star twin of the sun, the star that taketh away what our sun giveth.

    2. Michael Hiteshew Says:

      Grurray, the New Horizons spacecraft that just passed Pluto is now headed for the Kuiper Belt. To my mind, that puts eyes out in that region that may prove very useful. Very intriguing article, thanks.

    3. Mike K Says:

      I have books on Astronomy that I haven’t looked at in years. My astronomy find died about ten years ago and none of my kids are interested. I have a Celestron 8 inch scope in storage for my grandson if he gets interested.

      It has an electric drive and a a Latitude Wedge for better viewing in our latitude.

      I hope he gets interested. If I move back to Tucson, that is an ideal place for amateur astronomy,

    4. Mike K Says:

      Astronomy friend…

    5. David Foster Says:

      Greaat picture!

    6. Michael Hiteshew Says:

      Mike, how did you like that SCT? I’ve read they can be good instruments once they’ve cooled down, but that can take a while. Were you able to see deep sky objects with it?

      There are lots of inexpensive telescope mountable CCD cameras available now. Also, lots of gear available for mounting a DSLR. Maybe if you move to Tucson you can take up astrophotography. That could be fun. The skies there are probably close to ideal, though there might be a bit of skyglow from the city. With a computer controlled telescope like that, you could set it up on your patio and control it from your desk via your computer. Does your wife have any interest?

    7. Robert Schwartz Says:

      Sadly, I live in a town that has 190 cloudy days per year. Further it is heavily treed. One of these days.

    8. dearieme Says:

      I strongly recommend the stars of the Southern Hemisphere, seen from the bush i.e. far from city lights. It’s best to look from a hill so that the stars stretch down below your feet. Bloody marvellous; exhilarating.

    9. Mike K Says:

      “There are lots of inexpensive telescope mountable CCD cameras available now.”

      I was into it about ten years ago and CCD cameras were about $25,000. It’s amazing how that technology followed Moore’s Law.

      Tucson is a “dark city” because of Kitt Peak and the sky is ideal. It can get awfully cold in winter but summer is fun. Because of the dark city policy, speed limits are lower at night and the signs have two speeds, one that shows umpire headlights.

      My grandson (I have four grand daughters) has not shown much interest in astronomy but I have hopes. The grand daughters,except one, are quite a bit younger.

      He has my medical school microscope, as well.

    10. Gene Says:

      Amateur headline-writing, too.

    11. Michael Hiteshew Says:

      Thanks for your enlightening contribution.

    12. morgan Says:

      I second Dearieme’s recommendation, the view of the Southern Hemisphere sky at night in the bush is outstanding. I viewed it in the 1980’s from the bush in southern Angola, miles and miles from any city or town lights on the horizon. Breath taking for sure!

    13. Mike K Says:

      When I was a boy, my father had a gold driving range in the summer. I used to work there and we spent most nights. After all the customers were gone and we had turned out the big lights, I used to lie on my back and look at the night sky. It was almost as great a view as the bush would provide as the range was way out on the suburbs and lighting in those days was much less than now. Arizona is good but that was magnificent.

    14. PenGun Says:

      Certainly Deep Sky Video is great but it’s just a part of the University of Nottingham’s and Brady’s output. Sixty Symbols was the first channel made and I’ve been subscribed for years.

      Sixty Symbols:
      https://www.youtube.com/channel/UCvBqzzvUBLCs8Y7Axb-jZew

      Periodic Videos:
      https://www.youtube.com/channel/UCtESv1e7ntJaLJYKIO1FoYw

      Nottingham Science:
      https://www.youtube.com/channel/UCCAgrIbwcJ67zIow1pNF30A

      Deep Sky Videos:
      https://www.youtube.com/channel/UCo-3ThNQmPmQSQL_L6Lx1_w

      As well Numberphile, although not U of N is affiliated:
      https://www.youtube.com/channel/UCoxcjq-8xIDTYp3uz647V5A

      I spend time there.