Under the Southern Cross


Southern Milky Way Over OzSky Star Party

The Southern Cross, the iconic constellation of the southern sky, shines high in the south on austral autumn nights.

I’m in one of my favourite places, Australia, in particular at its self-proclaimed “astronomy capital,” Coonabarabran in New South Wales. Down the road from me is the Siding Spring Observatory.

But for 3 weeks I’m using my own telescope gear to observe and photograph the fabulous southern skies.

For part of my time here I’m attending the annual OzSky Star Party, a small and rather exclusive event for observers from around the world who come here to revel in celestial wonders visible only from southern latitudes.

The lead image at top is a 7-panel panorama of the star party in action, on the grounds of the Warrumbungles Mountain Motel, with a dozen or more large and premium telescopes set up for our use.

Overhead is the arch of the southern Milky Way, with the Southern Cross here at its highest about local midnight now in early April at the start of autumn. Below the Milky Way is the Large Magellanic Cloud, a companion galaxy to the Milky Way, itself a superb target for telescopes.

To the far right in the Milky Way is Sirius amid the gum trees, and the stars of Canis Major diving into the west. To the far left are the bright star clouds of Scorpius and Sagittarius rising in the east, bringing the glowing core of our Galaxy high into the austral sky. Bright Mars and Saturn shine in and around Scorpius.

This is a view of the Milky Way everyone should see – it is should be one of the top items on any amateur astronomer’s bucket list.

Star Trails over the OzSky Star Party
Circumpolar star trails over the OzSky star party near Coonabarabran, NSW, Australia, on April 3, 2016. This is a stack of 49 frames, each 45 seconds at f/2.8 with the 15mm fish-eye lens on the Canon 6D at ISO 4000. The ground comes from three frames in the sequence. Stacked with Advanced Stacker Plus actions using Streaks mode.

Here, above, I’ve stacked images from a time-lapse to create a star trail scene with the stars of the southern sky rotating about the blank South Celestial Pole. Again, the Southern Cross is at top.

Southern Milky Way from Alpha Cen to False Cross
The deep south Milky Way from Alpha and Beta Centauri (at left) to the False Cross in Vela and Carina (at right). This is a stack of 5 x 4 minute exposures at f/2.8 with the 35mm Canon L-series lens and filter-modified Canon 5D MkII at ISO 1000, with an additional similar exposure layered in taken through the Kenko Softon A filter to provide the star glows. Tracked on the iOptron Sky Tracker. 

This view, above, focuses on the Milky Way of the deep south, from Vela to Centaurus, passing through Carina and Crux, with the bright Carina Nebula, the Southern Cross, and the dark Coal Sack front and centre.

Mosaic of Crux, the Southern Cross
A 3-panel mosaic of the Southern Cross, Crux, shot April 5, 2016 from Tibuc Cottage, Coonabarabran, NSW, Australia. This is a moasic of 3 panels, each a stack of 4 x 4-minute exposures with the Borg 77mm f/4 astrograph and filter-modified Canon 5D MkII at ISO 1600. Stacked and stitched in Photoshop.

Here I zoom into the Southern Cross itself, in a mosaic of 3 panels to cover the smallest constellation using a high-resolution astrograph, a 300mm f/4 lens. The Coal Sack is at lower left while numerous star clusters lie embedded within and around the Cross, including the famous “Jewel Box” at left, next to Beta Cruxis, aka Becrux.

The Southern Milky Way and Magellanic Clouds
The deep southern Milky Way arching across the sky, from Puppis and Vela at upper right, to Centaurus at lower left. The two Magellanic Clouds are at lower centre, with the Large Cloud at top. This is a stack of 5 x 1.5-minute exposures, all tracked on the iOptron Sky Tracker, at f/2.8 with the 15mm fish-eye lens, and Canon 5D MkII at ISO 3200. The ground comes from just one of the tracked exposures to minimize blurring. Taken from the Tibuc Gardens Cottage near Coonabarabran, NSW, Australia on March 30, 2016.

I shot the Crux mosaic from my cottage site at Tibuc Gardens, a superb dark sky site and home to a new cottage built after the devastating bush fires of 2013 which destroyed all the other cottages I had stayed at in previous years.

There’s much more to come, as I rapidly fill up my hard drive with time-lapses and deep-sky images of the southern sky. I already have several blogs worth of images processed or about to be. In the meantime, check my Flickr site for the latest images hot off the hard drive and uploaded as best my Oz internet connectivity allows.

— Alan, April 7, 2016 / © 2016 Alan Dyer / www.amazingsky.com

 

The Milky Way of the Deep South


Vela to Centaurus with Crux & Carina (35mm 5DII)

The Milky Way of the southern hemisphere contains some astonishing deep-sky sights.

The lead image above shows the section of the Milky Way that extends farthest south, and so is visible only from tropical latitudes in the north and, of course, from the southern hemisphere. I shot these images this past week in Australia.

The wide-angle image above takes in the southern Milky Way from Vela, at right, to Centaurus, at left. In the middle is the Southern Cross (left of centre), the Carina Nebula complex and surrounding clusters, and the False Cross at right of frame. The close-ups below zoom into selected regions of this area of the Milky Way. All are spectacular sights in binoculars or any telescope.

Coal Sack and Jewel Box (77mm 5DII) #2

This image frames the left side of Crux, the Southern Cross. The bright stars are Becrux (top) and Acrux (bottom). Just below Becrux is the compact and brilliant Jewel Box cluster, aka NGC 4755. Below it are the dark clouds of the Coal Sack, which in photos breaks up into discrete segments and patches.

 

Pearl Cluster and Lambda Centauri Nebula (77mm 5DII)

This region is a favourite of mine for images and for visual scanning in any telescope. The large nebula is the Lambda Centauri complex, also labelled the Running Chicken Nebula. Can you see its outline? Above it is the beautiful Pearl Cluster, aka NGC 3766.

 

Carina Nebula and Clusters (77mm 5DII)

This is the standout object in the deep south – the Carina Nebula complex. I’ve shot this many times before but this is my best take on it. At upper left is the Football Cluster, NGC 3532, while at upper right is the Gem Cluster, NGC 3293.

Seeing this area in person is worth the trip to the southern hemisphere. There are now many photographers up north who have shot marvellous images of Carina but using robotic telescopes. They have never actually seen the object for themselves. They print the images upside down or sideways, a sign of their detachment from the real sky.

You have to stand under the southern stars to really appreciate the magnificence of the Milky Way. All else is just data taking.

– Alan, April 5, 2014 / © Alan Dyer

 

The Southern Cross and Carina Nebula


Southern Cross and Carina Nebula (50mm 60Da)

Two icons of the southern hemisphere sky shine side by side in the Milky Way.

Last night was a hazy one at my site in Australia, with high clouds drifting through all evening. I made the best of it and shot some constellations, including the most famous in the southern sky, the Southern Cross, or Crux. It stands at left in the frame, with its distinctive four main stars, three of the blue and the top star of the cross, Gacrux, a very orange tint.

To the left of and below Crux the Milky Way is marred by a dark cloud of interstellar dust, the Coal Sack.

To the right of the frame you can see the pink “flower” of the Carina Nebula, one of the largest star forming regions in the sky. It is flanked by several star clusters, notably the very blue Southern Pleiades, or IC 2602, shining below the Carina Nebula.

The natural haze in the sky added glows around the stars, accentuating their colours.

In all, this is one of the richest and most colourful areas of the sky. It’s a highlight of any southern sky tour.

– Alan, March 23, 2014 / © 2014 Alan Dyer