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ProAstroz - Australia's leading William Optics & exclusive Founder Optics Distributor
ProAstroz - Australia's leading William Optics & exclusive Founder Optics Distributor

The Night Sky Planisphere & Dimmable Red Light Torch PACKAGE Southern Hemisphere

Original price $55.00 - Original price $55.00
Original price
$55.00
$55.00 - $55.00
Current price $55.00
The Night Sky Planisphere for the Southern Hemisphere by David Chandler - Astronomy star map 

    Generally regarded as the BEST planisphere!

    This sturdy, plastic laminate covered planisphere is a quick and convenient way of seeing which constellations are above the horizon at any specified time and day of the year.

    Sky and Telescope magazine adopted The David Chandler 'Night Sky' planisphere in 1976 and has promoted it ever since. It is widely recognised by the amateur astronomy and educational communities as the best planisphere on the market.

    Eliminates over 90% of the distortion inherent in conventional one-sided planispheres.

    "Chandler's planisphere (rotating star-finder wheel) is the finest available" Sky News

Key features:

  • Southern Hemisphere: Suitable for Australia, New Zealand, South Africa, Argentina, Chile and other nations in the Southern Hemisphere 
  • White background with dark stars for easy nighttime readability: a must for a planisphere. 
  • Heavy duty plastic laminate covers the 2 sides of the planisphere so it does not get damp at night. 
  • Designed in collaboration with editors of Sky and Telescope magazine 
  • Selection of deep sky objects for binocular or telescope viewing included 
  • Large in size for easy readability! Measures approx 21 x 25 cm

  

Night Reader Pro dimmable 630nm Red light LED Astronomy torch for telescope - Preserve night vision


The Night Reader Pro™ is a true Astronomer’s Flashlight built with a 630nm red LED to help you read a planisphere or atlas in the dark without depleting your night vision. There is no white light option to accidentally activate so you can use the Night Reader Pro™ without worry of loosing your night vision or upsetting your neighbours at a star party. Although the light is bright enough to be used when setting up equipment, the brightness can be brought up gradually to any level desired for reading at close quarters with minimal afterimaging. The LED is shielded so the light will shine where you want it, but not directly in your eyes.

Night Reader Pro™ is made tough in the USA and carries a lifetime warranty. The standard CR2032 battery is easy to replace and will give you 36 hours or more of operation - each battery costs about AUD$0.25 to AUD$0.50 on eBay (look for packs of 10 or 20 batteries), so is affordable to replace. The housing is rated IPX-4 for moisture resistance and has gold-plated contacts for reliable service. A quick-clip keychain attachment is provided to keep the light handy with fast and easy access. This light will be there when you need it and you won’t be fumbling with a split-ring attachment. With the Night Reader Pro™ clipped to a zipper on your jacket or to the strap on your binoculars you will always have a top-notch light source at the ready.

It can take up to 45 minutes for the human eye to completely adapt to darkness as a protein called Rhodopsin builds up in the rod cells. Once your night vision is adapted you might be surprised at how many more objects are visible, and how much better you can see details in faint objects. Unfortunately all it takes is a about a second of the bright white light from a flashlight or a cell phone display to deplete your night vision and have you waiting around to adapt again! The longer wavelength red light produced by our Night Reader is detected by the cone cells in your eye and does not deplete Rhodopsin in your rod cells. This allows you to read a chart or atlas and immediately return to viewing the sky.


 

    More details for beginners:

    For anyone even remotely interested in the night sky, one of the essentials is learning to locate the constellations at any time or date. How do you do that? It's as simple as a rotating basic starchart called a planisphere. While it would be easy to think they're all created alike - they're not. For beginners, you need to look for one that's easy to use and to read.

    If you've ever looked at a starchart in a magazine, you'll remember the dark background with white stars. This is great for planning an evening, but not for use in the field. Turning on any kind of white light will seriously impair your night vision and charts of this type need white lighting to be seen. If you look at a conventional star chart, you'll see a white background with dark stars, constellation lines, objects, etc. This design was meant to be used with a red-lensed flashlight (another astronomy staple!) which helps to preserve your night vision and still easily read the maps. "The Night Sky     Planisphere" by David Chandler uses a white background with dark blue print to help you along the way!

    As you progress outdoors at night, you'll find yourself using your planisphere and you'll quickly notice the impact the environment has on its construction. It's great to use paper or cardboard planispheres to start a class along the road to learning, but it won't take long until dew or ambient moisture warps your planisphere, rendering it useless. David Chandler thought about that when he designed "The Night Sky Planisphere" and added a heavy-duty plastic cover! With just a little proper care, this planisphere will endure for years.

    Because we live on a round Earth and the sky appears as a dome, some areas of the sky will look "stretched" when a chart tries to convey a round object as flat. David Chandler's planisphere also eliminates over 90% of the distortion that other star wheels introduce as a result of trying to flatten out the whole sky into one map.

    Because there are so many stars and constellations to be listed, reading some planispheres can be confusing. "The Night Sky" is made up of two maps, one on each side. The chart for observers facing south is located on the front, and if you are facing north, just turn the planisphere over. The easy-to-read objects on the planisphere include constellation names and outlines, bright stars, the Milky Way, selected deep-sky objects like galaxies and nebulae, the ecliptic (planets follow this imaginary line) and coordinate grid lines that help one to cross-reference with star atlases if desired. Planets are NOT depicted on the star wheel because they move across the sky independent of the stars. If they were shown on this chart, it would need to be "upgraded" more often than computer software....and that would not be a good thing!

    David Chandler's "The Night Sky Planisphere" promises to be a useful and enjoyable tool for many years.