Dark Sky Etiquette

A dark sky site is an observing area where we can avoid and be free of light pollution. It enhances our view of the night sky from about a few hundred naked eye stars to over many thousands.
There are two ways you can enjoy such a site: alone or in the company of fellow enthusiasts. The first is a quiet, very personal experience, valuable in itself as a way to connect to the cosmos. But the second is probably by far the more enjoyable of the two, provided everyone who shares the experience has respect for all present. That means following the basic rules of etiquette described below.

Plan to arrive before sunset. First, it will be easier to set up in daylight. Second, arriving late with headlights blazing can interfere with other people who are trying to fully adapt their eyes to darkness, which can take up to an hour.

If
you do unavoidably arrive late, dim your headlights on approach.

Whatever
time you arrive, slow down your speed of approach to avoid raising dust into the air.

If
parking is at a premium, leave the closest spots for people with the most (and/or heaviest) equipment. Their back muscles will thank you!

Don’t
move your car again until it’s time to leave. Especially avoid backing up, since backup lights are white, quite bright and cannot be disabled (only covered).

Darken
your vehicle’s interior by turning off your dome lights. Most cars are equipped with a simple switch. Truck lights do not always have a switch but the bulb can be loosened or removed. Do the same for trunk and hatchback lights.For the same reason, opening, closing and slamming of car doors and trunks should be kept to a minimum. Organise your car at home to reduce the number of times you need to go in for something.

Conduct
your idle chatter before viewing begins. Thereafter, keep the conversation subdued. Enthusiastic cries of “I’ve found it!” and “Have you seen this?” are exceptions to this rule!

 

Setting up together is not a problem. but respect each other’s space.

Use
red LED or red-filtered lights while you observe and if you have to set up in darkness. Never use white-light flashlights. Use the smallest possible light needed for reading star charts. Shelter your light with your body, telescope, car or whatever to minimize glare.

Before
approaching a telescope ask if the owner is doing photography or imaging. If they are, be careful not to step in front of the field of view of the telescope or lens. Especially don’t wave a light around in the vicinity.

Noise
pollution is as distracting to your concentration as light pollution is to a dark sky. In general, keep radios and CD players off or use headphones. Your taste in music, and the volume at which you like to listen to it, are probably not the same as everyone else’s.

Sharing views is a benefit to finder and seeker, but please ask before you look through another’s telescope. Better yet, wait until you are invited.

Don’t
touch other people’s equipment or lenses. If you do accidentally touch someone else’s lens or eyepiece, perhaps smudging it in the process, don’t try to clean it yourself. Apologize to the affected party and let them decide what to do.

Keep
food and drink away from telescopes. Pets should be kept on a leash.

If there are children present, keep a close eye on them.

If
you make an early departure from the group, warn the other people when you are about to leave to give them a chance to protect their night vision.

When
leaving a site as the next-to-last person, inform the person remaining that you’re about to pack it up. It’s not a nice surprise to raise your head from the eyepiece only to find yourself all alone!

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Helios Aero ED Binoculars

 

The Helios Aero ED 8×42 and 10×42 tick all the boxes required for the demanding birdwatcher.  At an incredible £199 for both 8x and 10x, they must be one of the best value / high performance ED birdwatching binoculars

Ideal for birdwatching, these stylish premium quality, rubber armoured, modern open-hinge models combine light weight (magnesium alloy body) with excellent optical performance. Employs exotic ED (Extra low dispersion) glass for superior colour fidelity. Features high-index Phase-Corrected Bak-4 prisms and full broadband multi-coated optics. O-ring sealed and nitrogen filled for waterproof, fog-free performance. Twist-up rubber eyecups for spectacle wearers. Eye relief is 18.4mm and 15.2mm respectively (8×42 & 10×42 models). Supplied with neck strap and case.

Update. Discontinued

 

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What does Absolute Magnitude mean

Absolute Magnitude the apparent brightness a star would have if placed at a distance of 10 parsecs from the earth.

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Opticron Discovery WP PC 8×42 binoculars. Customer review

A customer came to the Northern Optics retail outlet recently. Her requirement was a good quality lightweight pair of binoculars. Despite looking through some 8×32 and 10×32 binoculars, she opted for the slightly larger Opticron Discovery WP PC 8×42.

Even though these have 42mm objectives, they feel as lightweight as many 32mm binoculars. This was a major factor.

The two main reasons why the customer chose the 8×42 was the brightness of the image, and the fact that they are only £10 more than the Opticron Discovery WP PC 8×32

 

Click here to buy

 

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Bird sightings. Water`s Edge Country Park. November 2011

List of Bird sightings at the Water`s Edge country park. Week ending 22nd November 2011. Location. Barton Upon Humber, North Lincolnshire

  • Black Bird
  • Bull Finch
  • Coot
  • Cormorant
  • Carrion Crow
  • Collard Dove
  • Tufted Duck
  • Dunnock
  • Gold Finch
  • Canada Goose
  • Great Crested Grebe
  • Little Grebe
  • Common Gull
  • Heron
  • Magpie
  • Mallard
  • Meadow Pipit
  • Moorhen
  • Pied Wagtail
  • Pochard
  • Redshank
  • Robin
  • Shoveller
  • House Sparrow
  • Teal
  • Blue Tit
  • Coal Tit
  • Great Tit
  • Long Tailed Tit
  • Grey Wagtail
  • Wood Pigeon
  • Wren
  • Mute Swans

 

 

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Lincoln Astronomy society. Lecture meeting December 6th 2011

Lincoln Astro society .Tuesday 6th December 2011 starting at 7.30pm. The speaker will be Dr. Ann Bonnell of Leicester Astro Society. The title of her lecture is ’50 Years of Manned Spaceflight’ which she was planning to give last year but had to cancel at the last minute.

The lecture meetings are open to Members and Non Members, although a charge of £3 applies to non members, which is payable on the night.

Tea and Coffee refreshments will be available following the lecture at approximately 9.30pm.

 

Lincoln Astronomy Society website

 

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What is an Asterism

An Asterism is a group of stars that appear to make an easily recognized shape, such as the “Big Dipper” or the “Coathanger”. They are in effect a well know shape within a Constellation.

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Hawke Optics Full Sized Tripod

The Hawke full sized tripod at £89.95 (Nov 2011 price) nicely bridges the gap between the cheaper plastic versions and the heavier Aluminium tripods. Made from light weight aluminium and complete with carry case, this is a very portable mount.

Complete with 3-way head, bubble level and mounting plate locking pin. The handles are large and easy to adjust. Ideal for general use and low levels observations and photography.

I would recomend for scopes up to 65mm. Not suited for cameras with extreme long lenses.

Great value for money

Click here to buy

 

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What is an eyepiece

 An eyepiece is a magnifier, much like a high power magnifying lens. When placed at the real image made by the lens or mirror of a telescope, the eyepiece projects a virtual image into your eye, enabling you to see the target.

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Opticron Trailfinder ll Monocular

Available in 8×25 and 10×25, the Opticron Trailfinder ll Monoculars are perfect for everyday use. At a price that places them between the budget Oregons and the higher end 30mm and 42mm waterproof DBA and BGA versions. Good eye relief for spectacle wearers.

Rugged, purpose-built pocket monoculars available in either 8x or 10x magnification, the Trailfinder II series deliver quality and value for money to people interested in owning and using a monocular while out enjoying the countryside.

Designed for walkers and hikers alike, these compact roof prism instruments feature a slide bar focusing system to allow easy one hand operation with or without gloves.

The aluminium bodies are nitrogen gas waterproof to prevent water penetration and misting on the internal surfaces and are covered in a textured rubber armour to aid grip in the hand and protect against knocks and bumps during use or while packed in a rucksack.

Available in a choice of either black or dark green body colours, other features include:

  • Fully multi-coated BAK 4 glass prisms with fully multi-coated lenses (all air/glass surfaces)
  • Long eyerelief eyepiece giving full field of view with spectacles
  • Twist-type retractable eyecup assembly
  • Internal focusing: infinity to under 2m
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