Mosaic of the Autumn Constellations


Mosaic of the Northern Autumn Constellations

I present a horizon-to-zenith panorama of the pantheon of autumn constellations.

Yes, I know it’s winter, but as it gets dark each night now in early January the autumn stars are still front and centre. I took the opportunity during a run of very clear nights at home to shoot a panorama of the autumn sky.

It is a mosaic that sweeps up the sky and frames many related Greek mythological constellations:

• from the watery constellations of Aquarius, Pisces, and Cetus at the bottom near the horizon…

• to Pegasus and Aries in mid-frame…

• on up to Andromeda and Perseus at upper left…

• and finally Cassiopeia and Cepheus at the top of frame embedded in the Milky Way overhead. The Andromeda Galaxy, M31, is just above centre.

Mosaic of the Northern Autumn Constellations (with Labels)

Here, I’ve labeled the participating constellations, though only a few, such as the “square” of Pegasus and the “W” of Cassiopeia, have readily identifiable patterns.

Most of these constellations are related in Greek mythology, with Princess Andromeda being the daughter of Queen Cassiopeia and King Cepheus, who was rescued from the jaws of Cetus the Sea Monster by Perseus the Hero, who rode on Pegasus the Winged Horse in some accounts.

Zodiacal Light brightens the sky at bottom right in Aquarius, and angles across the frame to the left.


 

TECHNICAL:

I shot this from home on a very clear night January 2, 2016 with the Zodiacal Light plainly visible to the naked eye.

This is a mosaic of 5 panels, each a stack of 5 x 2 minute exposures, plus each panel having another stack of 2 x 2 minute exposures blended in, and taken through the Kenko Softon filter to add the fuzzy star glows to make the constellations stand out.

All were shot with the 24mm Canon lens at f/2.8 and Canon 5DMkII at ISO 1600. All tracked on the AP Mach One mount.

All stacking and stitching in Photoshop CC 2015. Final image size is 8500 x 5500 pixels and 3.6 gigabytes for the layered master.

– Alan, January 3, 2016 / © 2016 Alan Dyer / www.amazingsky.com

 

Comet Lovejoy in Andromeda


Comet Lovejoy in Andromeda

Comet Lovejoy appears in Andromeda as the comet fades into the distance. 

This was the view Monday night, February 9, with Comet Lovejoy now moving slowly north through Andromeda. From a dark site it is now still visible to the unaided. In binoculars a short tail was just barely visible. But even in photos the comet has lost most of its long blue tail it sported last month.

The view above takes in the W of Cassiopeia at top, and some of the stars of Andromeda at bottom. The Andromeda Galaxy is at right. I’ve arrowed the comet, a fuzzy star green star.

Zodiacal Light & Milky Way

Shortly after I shot Lovejoy’s portrait I shot this image of the evening Zodiacal Light, the tower of light at left. At right is the setting autumn Milky Way. At the base of the Zodiacal Light is bright Venus just setting, with fainter Mars above it.

The next two weeks are ideal for sighting the Zodiacal Light. For more on what’s up in the sky now, see my previous blog.

Clear skies!

– Alan, February 9, 2015 / © 2015 Alan Dyer / www.amazingsky.com

Heads Up! – Comets, Planets, and Zodiacal Light, Oh My!


Feb Evening Sky

As the Moon departs the evening sky, we are left with a dark sky for viewing Comet Lovejoy, converging planets, and the elusive Zodiacal Light.

The western sky contains wonders this month.

Look into the evening twilight and you’ll see brilliant Venus appearing a little higher each night. As it climbs up, fainter Mars above is descending closer to the horizon. The two planets are converging toward a spectacular close conjunction with each other, and with the waxing crescent Moon, on February 20.

Meanwhile, Comet Lovejoy (C/2014 Q2) continues to perform well. It is now in the northwestern sky in the early evening, as it travels up through Andromeda into Cassiopeia.

While technically visible to the unaided eye, you really need binoculars or any telescope to see Comet Lovejoy well. Through optical aid it does show a faint tail. But it takes a long exposure photo to show it well.

Lovejoy in February

Here’s where to find Comet Lovejoy over the next couple of weeks, during the current dark-of-the-Moon period.

Look for a fuzzy star in Andromeda. It’s not passing very near any notable deep-sky objects, but its position will still make for a nice wide-angle photo with the comet embedded in this photogenic region of the northern autumn sky.

Comet Lovejoy & Zodiacal Light (Jan 16, 2015)

The other sight to look for each evening for the next two weeks is the Zodiacal Light. My photo shows it from last month, when Comet Lovejoy was crossing the ecliptic.

Look for a pyramid of light stretching up from the sunset point to high in the west. It follows the ecliptic, the green line in the top star chart. It takes a dark sky to see it, and it helps to be at a southerly latitude. But I’ve seen and shot the Zodiacal Light nicely in February from home in Alberta at 51° latitude.

The Zodiacal Light is caused by sunlight reflecting off cometary dust in the inner solar system. To see it, wait for most of the evening twilight to fade away. The glow that’s left brightening the western sky is the Zodiacal Light.

There’s lots to see just in the western evening sky during the next two weeks. Clear skies!

– Alan, February 9, 2015 / © 2015 Alan Dyer / www.amazingsky.com

Andromeda over Mt. Andromeda


Andromeda over Mt. Andromeda #2

The stars of Andromeda and the autumn sky shine over Mount Andromeda.

This is a photo I’ve been after for several years, one practical to take only in early autumn. Last Sunday night, the skies were ideal.

This is the constellation of Andromeda over its namesake peak, Mt. Andromeda, at right.

The mountain was named in the 1930s by pioneering mountaineer Rex Gibson for the mythological princess. Andromeda is represented in the sky by an arc of stars, here at top centre, stretching from the Square of Pegasus, at right of centre, to Perseus, at left. Just above the main stars of Andromeda lies the oval glow of the Andromeda Galaxy.

The bright object at lower left is the overexposed waning quarter Moon rising in the southeast. Above it are the Pleiades rising.

I shot this from the Forefield Trail just up from the parking lot for the Toe of the Glacier walk to Athabasca Glacier, just off frame to the right. The hills in the foreground are the lateral moraines from the rapidly retreating glacier.

P.S. This my 500th blog post, a major milestone I would think! Thanks for being a fan and reading along. I hope you are enjoying my tours of what is truly an amazing sky.

– Alan, September 17, 2014 / © 2014 Alan Dyer

The Princess Stars


Andromeda (50mm 5DII)

The stars of Andromeda the Princess highlight the autumn sky.

Here’s an image from last night, October 4, that frames all of the constellation of Andromeda, now high in the northern autumn sky. A trio of coloured stars arcs across the centre of the image, forming the main pattern in Andromeda. In Greek legend she was the daughter of Queen Cassiopeia and was rescued by Perseus from the devouring jaws of Cetus the Sea Monster.

Above the centre star lies the constellation’s most famous feature, the Andromeda Galaxy, shining at us from 2.5 million light years away. It is the most distant object easily visible to the unaided eye.

An equal distance below the centre star of Andromeda you can see another smaller fuzzy spot. That’s the Pinwheel or Triangulum Galaxy, a dwarf spiral 2.8 million light years away, but also a member of the Local Group of galaxies that contains our Milky Way and Andromeda as its two main members.

At left, just below centre, is a large open cluster of stars, NGC 752, easily visible to the naked eye.

For this shot, as I do for most constellation portraits, I used Photoshop to layer in a shot taken through a diffusion filter (the Kenko Softon A) on top of a stack of shots taken without the filter. This allows me to add the enhanced glows around stars to bring out their colours, and to do so in a controlled fashion by varying the opacity of the filtered view. Shooting on a night with high haze or cirrus clouds has the same end effect but that’s hardly a reliable way to take constellation images. Combining filtered and unfiltered views works great, and gives the “look” made popular years ago by Japanese astrophotographer Akira Fuji.

– Alan, October 5, 2013 / © 2013 Alan Dyer

 

Thunderstorm in the Moonlight


Thunderstorm in Moonlight (June 25, 2013)

A thunderstorm rolls across the northern horizon with the stars of Cassiopeia and Andromeda rising.

This was a perfect night for storm shooting. The storm was far enough away to not engulf me in rain and wind, but close enough to show detail and reveal its bolts of lightning. A waning gibbous Moon shone in the south lighting up the storm clouds to the north and turning the sky blue.

Meanwhile the stars of Cassiopeia, Perseus and Andromeda were rising behind the storm clouds, a nice contrast of Earth and sky.

I’ve been after a confluence of circumstances like this for a few years. An aurora to the northeast would have been nice as well. But you can’t have everything!

– Alan, June 25, 2013 / © 2013 Alan Dyer

Conjunction of Comet and Galaxy


Comet PANSTARRS & M31 (March 31, 2013)

Tonight, April 1, we enjoyed the rare conjunction of a comet with a galaxy.

This is Comet PANSTARRS below the Andromeda Galaxy, a.k.a. M31. The two objects were less than a binocular field apart – 4 degrees – on the sky. But in real space they were separated by millions of light years. The comet was 192 million kilometres from Earth tonight and receding. But that’s a stone’s throw compared to the 2.5 million light year distance of the Andromeda Galaxy. Light was taking a mere 10 minutes to get to us from the comet, but the light from Andromeda was 2.5 million years old.

And yet, the two objects looked similar in brightness and shape to the binocular-aided eye.

I caught the two just above the horizon as they were dipping into haze and trees. The circumstances didn’t make for a technically great photo but with PANSTARRS we’ve all had to shoot despite the conditions and hope for the best.

With worsening weather prospects for the next week I suspect this will be my last look at PANSTARRS for a while.

– Alan, April 1, 2013 / © 2013 Alan Dyer