The Joys and Laments of Viewing Under Darker Skies

Over Labor Day weekend I brought the OneSky along on a family camping trip to the green zone skies of Northern VT. Thanks to the late rising third quarter moon I had lots of time under dark skies gawking at an overwhelming number of stars. It had been a little while since I’ve used the OneSky and I was reminded just how great a scope it is.

Some highlights of the two nights were seeing the Andromeda galaxy stretching beyond the OneSky’s 2.5º max field of view, the Double Cluster, and the brightest, most detailed view of M81 / M82 I’ve had yet. Not to mention the star clouds of the Milky Way arcing across the sky.

Returning home I was disappointed to see my skies appearing gray and washed out but I am slowly becoming re-accustomed to my suburban backyard view of the heavens. I’ve heard of other enthusiasts who only or primarily observe from a dark site and I can certainly see the appeal. The Moon and planets excepted, pretty much every object shows a brighter, more detailed view under a darker sky.

Still, I plan to pursue enjoyment in viewing from wherever I can. At the very least it’s good practice – keeping me mindful of the constellations’ current positions, star hopping to new and familiar targets, and rehearsing the dance of working with the telescope – it all helps me to make the most of the brief opportunities I do get to view under darker skies.

And while this rationale may help to steel myself against the temptation to accept a memory of magnificent skies as a replacement for viewing from my backyard, once outside it doesn’t take long before I am enjoying the views through the eyepiece on their own terms.

Clear skies!

-Dave

Original content copyright 2015 by David Philips. All Rights Reserved. This post may contain links to affiliate sites; sales through affiliate links may benefit this site.

60mm Sessions: Omicron Cygni

Annotated finder chart for Omicron Cygni. Original chart from the TUBA Atlas.

Annotated finder chart for Omicron Cygni. Original chart from TUBA

These last nights, though brightened by the full moon, have been clear, cool, and relatively free of bugs and so as tends to be the case this time of year I find myself drawn to spending more time under the night sky.

Moonlit nights are a good time for observing double stars as the brightened sky does little to diminish their beauty. Out I went with my 60mm scope and copy of Double Stars for Small Telescopes to explore Cygnus.

With Deneb (Alpha Cygni) shining bright near the zenith I pointed my telescope roughly towards the tail of the swan and looked through the 6×30 finder. I was surprised to see what appeared to be a wide double star with a striking color contrast.

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The Perseids are Coming!

Each Summer the Persied meteor shower gives North Americans their best opportunity to view a flurry of “shooting stars”, with one appearing roughly every minute at the apex.

The Persied meteor shower peaks the night of August 12th* but activity will still be heightened a few nights before and after. This year the peak activity falls during the New Moon, which means conditions for viewing the shower will be good provided the weather cooperates.

In fact you may occasionally see a Persied meteor even now. The other night I was outside for a few minutes just checking the stars and saw a bright meteor streak by radiating from Perseus in the North East.

For more information on the Persieds and tips on how to observe the shower, check out the American Meteor Society’s viewing guide and Sky & Telescope’s article.

Clear skies!

*4:00 AM on the morning of the 13th to be precise.

-Dave

Original content copyright 2015 by David Philips. All Rights Reserved. This post may contain links to affiliate sites; sales through affiliate links may benefit this site.

Is an 8″ Dobsonian the Best Telescope for a Beginner?

A boy and his Dob viewing the Moon.

Follow any discussion of a beginner asking about a first telescope and it won’t be long before an 8″ Dobsonian is suggested. It might be the most recommended scope for beginners, and not without good reason, though there are several factors that should be seriously considered before buying one.

A Dobsonian is a Newtonian reflector on a simple alt-az mount. Before John Dobson popularized his simple, inexpensive mounting method, German equatorial mounts were commonly used, which were by necessity large and heavy, and thus expensive. By comparison an 8″ or greater Dobsonian becomes relatively affordable and portable.

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An 80mm Refractor under Dark(ish) Skies

I spent last week in North-Western Massachusetts, a relatively rural area that shows as dark-yellow on the light pollution charts, which is to say it is considerably darker than my red zone suburban backyard. I was understandably eager to observe under such conditions and so came the decision as to which telescope to bring along.

The AWB OneSky was a clear option but for whatever reasons (maybe just for the sake of variety) I decided to bring an 80mm refactor. While the 5″ aperture of the AWB would’ve been appreciated, under decent skies an 80mm can be a satisfying scope, and, being equipped with a 2″ focuser, the 80mm is capable of some breathtakingly wide fields of view.

It turned out that over the course of the week there was only one really clear night for observing but it certainly made bringing the scope worthwhile.

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40% Off at Sky & Telescope Store

Through Sunday, June 7th, you can use code FFSUMMER40 to get an unheard of 40% off at the Sky & Telescope Store.

Need a good star atlas? The Pocket Sky Atlas is $11.97 after the discount.

The PSA is my most used atlas due to its easy to use format but sometimes identifying an object would be easier if stars dimmer than 7th magnitude were charted. This is why I took advantage of the sale to add a copy of the Star Atlas 2000.0 to my library. I waffled a bit between the different versions offered but ultimately chose the unbound “desk” version as it will allow me to take just the pages I need with me to supplement the PSA. There is a good discussion about the various versions of Star Atlas 2000.0 over at the Cloudy Nights forum.

Another book that has been on my wish list for sometime is Sissy Haas’s Double Stars For Small Telescopes and I couldn’t pass it up at the sale price.

While 20-30% discounts come around a few times throughout the year, this the first time I’ve seen a 40% off promotion and is a fantastic opportunity to pick up any items that you may have had your eye on.

-Dave

Original content copyright 2015 by David Philips. All Rights Reserved. This post may contain links to affiliate sites; sales through affiliate links may benefit this site.

Saturn in Small Scopes

Enhanced image of Saturn eclipsing the Sun taken in 2006 by the robotic Cassini spacecraft. Courtesy NASA/JPL.

Enhanced image of Saturn eclipsing the Sun taken in 2006 by the robotic Cassini spacecraft. Courtesy NASA/JPL.

There’s something special about seeing Saturn in a telescope. Sure, viewing any of the planets is pretty amazing – the telescope reveals an object that to our eyes appears to be a star is actually a disc, a whole ‘nother world. It’s enough to get any observer’s heart pumping.

But then there’s Saturn – it’s not just a disc. Currently when viewed at very low powers the rings form much of the visual bulk of the planet, giving it an oval appearance with a hint of dark separation between the planet and its rings. What a surreal viewing experience to see this strange, wonderful object hanging in space.

With Saturn rising shortly after 7:00 PM and setting around 5:00 AM, now is a good time to view the planet, which is a showpiece in even small telescopes. For the best view, try to catch the planet as high in the sky as you can – currently it reaches maximum altitude around midnight. At my 40°N latitude the planet only gets up to ~30° so the atmosphere can make high power viewing difficult but still worthwhile. I was able to take advantage of a recent clear night to view Saturn with both a 60mm refractor and the Celestron FirstScope.

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A Night to Remember

I haven’t looked through a telescope in weeks. The second half of April seemed an endless string of cloudy nights and while I’m sure there were a few clear ones in there, one thing or another kept me from getting out under the stars with a telescope.

I am starting to miss observing and I can’t help but recall one of the last sessions of April, which happened to give the best views of Jupiter I’ve yet seen.

I was enjoying a pleasant evening out in the back yard with the kids when I first noticed Venus visible in the southwest and shortly after that was able to spot Jupiter, with some difficulty as the sky was still blue, near the zenith so I decided to bring out the 10″ Dob. Only a few weeks earlier I would’ve chosen a smaller scope but due to the mild weather that day I suspected the telescope would not need much, if any, cooling before being usable at high powers.

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60mm Sessions: Nova Sagittarii

If Nova Sagitarii 2015 No. 2. was charted in the Pocket Sky Atlas it would appear under the letter "U" in "Sagittarius".

If the dim star from which Nova Sagitarii 2015 No. 2 originated was charted in the Pocket Sky Atlas, it would be hidden under the “U” in “Sagittarius”.

By the end of March I had pretty much written off seeing Nova Sagittarii 2015 No. 2.

In Sky & Telescope’s oft updated article on the nova, Alan MacRobert refers to those unwilling to get out in the cold, pre-dawn hours as “slug-a-bed”s. Yeah, that’s me. My interested peaked about the same time as the Nova’s brightness in late March, then faded as the next day it dropped below magnitiude 5 and appeared to be on its way out completely.

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Explore Scientific “Countdown” Sale

Explore Scientific AR152 6" Achromatic Refractor

Explore Scientific AR152 6″ Refractor

Explore Scientific’s “Countdown to Astronomy Day” sale is on and almost everything* they offer is 20% off including telescopes and mounts.

Some of the more noteworthy deals:
Essential Series 80mm f/6 Triplet Refractor – $583.99
AR152 152mm Achromatic Refractor – $599.99
2x and 3x Focal Extenders – $79.99 each
2″ Dielectric Star Diagonal – $95.99
Twilight I Alt-Az mount – $159.99
Twilight II Alt-Az mount – $399.99

Sale prices are good until April 25th. I’ve come to own quite a few Explore Scientific products, including a couple of refractors and many eyepieces, and generally find them to be an outstanding value.

*Unfortunately their excellent eyepeices are excluded from the sale pricing.

-Dave

Original content copyright 2015 by David Philips. All Rights Reserved. This post may contain links to affiliate sites; sales through affiliate links may benefit this site.