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 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
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
Some 3 billion years from now we are going to collide with this galaxy.
This is the famous Andromeda Galaxy, now 2.5 million light years from us but getting closer by the day! Andromeda, a.k.a. Messier 31, is the most distant object readily visible to the naked eye. It now shines high overhead for us in the northern hemisphere.
I asked Siri, my iPad assistant, how many stars are in the Andromeda Galaxy, and she said one trillion. She’s right. Recent estimates put Andromeda’s stellar population at 3 or 4 times that of our own Milky Way Galaxy. It’s also bigger. Measuring from the outermost extremities of the disk gives a diameter of over 200,000 light years, twice the size of our home galaxy.
I took this shot last week. It’s stack of five 15-minute exposures with a new Lunt 80mm refractor. The long exposures bring out the faint halo of stars extending beyond the main bright disk, the part you see in a telescope. You can also see Andromeda’s two close companion galaxies: M32, looking like a fuzzy star below the core; and M110, the elliptical galaxy above the core and connected to the main galaxy by a bridge of faint stars.
– Alan, September 27, 2012 / © 2012 Alan Dyer