Looking at the Stars

Dark skies – Stargazing

image – @hollowvalleyresort

Darker is Better

view of the stars in the night sky at Haliburton Forest As the sun dips below the horizon, the Haliburton Highlands transforms into a serene haven for stargazers. Here, the moon casts its gentle glow, illuminating a world untouched by the harsh glare of artificial light. Unlike urban areas, where light pollution obscures the heavens, our Highlands offer an increasingly rare gift: pristine, star-filled skies that awaken a timeless sense of wonder.

In Haliburton Highlands, every cloudless night holds the promise of celestial beauty. Less than two hours from Toronto, this region stands as a beacon for stargazers, positioned in the lower third of the light pollution spectrum. Adjacent Algonquin Provincial Park is ranked in the Dark Gray zone, offering some of the darkest skies in Southern Ontario.

At the Haliburton Forest and Wild Life Reserve, an observatory and planetarium invite you to journey through the cosmos. On clear nights, peer through telescopes to uncover the mysteries of the stars. On cloudy evenings, step inside the planetarium to explore the myths and cultural stories that connect us to the night sky.

Experiences in Astronomy

With the use of the Schmidt-Cassegrain telescope(s) on clear, dark nights – along with a fantastic presentation astronomer/night sky photographer, Brian Mould, will introduce you to the world above, stargazing. This astronomy experience takes place at the edge of 100,000 acres of undeveloped land known as Haliburton Forest and night skies that are void of light pollution

On a clear night we can observe dark sky objects such as the Andromeda Galaxy. This superb location allows the opportunity to view individual stars, galaxies and deep sky objects not normally visible in populated areas.

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What does the light pollution map actually mean?

There are 15 colors found on the map. Light pollution limits stargazing and the visibility of milky way to the unaided eye, the visiblity of nebulae and galaxies seen in telescopes. Low light pollution conditions, or dark skies, is one of the most important properties of a good astronmical observing site.

This map is a small exerpt (175Km east-to-west, by 200Km north-to-south) from the Light Pollution Atlas 2006 by David Lorenz. David recalculated the The World Atlas of the Artificial Night Sky Brightness with newer data.

The central cross marks the location of the Haliburton Scout Reserve clear sky chart. Tiny crosses mark other charts. This map assumes an observer at sea level. A real observer should see a slightly darker sky.

The map doesn’t take weather into account.

Humidity in particular has a big effect. When there’s a lot of moisture in the air it tends to scatter the skyglow over greater distances. Whereas air with low moisture content can yield darker skies even close to a town. All else being equal, the same color zone will be darker in a dry climate compared to a humid one. Smoke and air pollution also have an effect.

The map doesn’t take elevation or terrain into account.

An observing site on a mountain top will often have a much clearer sky because you’re above a lot of the haze and air pollution in the lower atmosphere. A high vantage point lets you see stars all the way down to the horizon and puts you above a lot of the light domes. But because you can see so far there may still be plenty of lights in the distance. When you observe from a valley, a hill or mountain may block the light dome from the nearest town. Of course the stars in that direction will also be blocked, but this can make the sky seem a lot darker.

The map doesn’t take very localized lights into account.

You might think you’ve found the perfect observing site by looking at the map. But when you visit at night you find out there’s a new oil drilling rig or a bright security light on the nearest farm house.

Light pollution is not uniform across the sky.

It will always be brightest in the direction of the nearest city. Consider what it is you want to observe and find a site that’s darkest in that direction. Most of the time, having a dark sky to the south is most important for seeing the milky way. But for seeing the aurora borealis, you want a dark sky to the north. For viewing planets or the moon, light pollution is not a concern, you just want to get away from the glare of nearby lights.

Stargazing links of interest

Summer Celestial Calendar

The Night Sky – Darker is Better by Rick Whitteker

Dark Site Finder