Cosmic Pursuits

Basic astronomy and night sky information

Deep Sky Observing

Articles about how to understand, find, and see celestial objects including stars, galaxies, nebulae, and star clusters with binoculars, telescopes, and the naked eye.

Two Fine Galaxies in the Sculptor Group

by Brian Ventrudo Filed Under: Deep Sky

Image of NGC 55 acquired by Brett Soames of NSW, Australia and processed by Warren Keller at www.billionsandbillions.com.
Image of galaxy NGC 55 acquired by Brett Soames of NSW, Australia and processed by Warren Keller at www.billionsandbillions.com.

One of the closest congregations of galaxies to our own, the Sculptor Group consists of a series of relatively bright and shapely galaxies clustered in the barren sky near the south galactic pole. The group is anchored by the majestic NGC 253, the Silver Coin Galaxy, one of the most beautiful galaxies for a small telescope. But a little farther south lie two more gems, NGC 55, also called the ‘String of Pearls’, and NGC 300, one of a handful of galaxies known as the ‘Southern Pinwheel’. For northern observers, this pair is low in the thick air over the southern horizon in the late months of the year. Southern-hemisphere observers, however, see these galaxies nearly overhead where it’s much easier to see their distinctive shape and features in a small telescope [Read more…] about Two Fine Galaxies in the Sculptor Group

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IC342: An Obscured Spiral Galaxy, Hiding in Plain Sight

by Brian Ventrudo Filed Under: Deep Sky

The nearly face-on spiral galaxy IC342 (Caldwell 5) in the constellation Cepheus. Image credit: Terry Hancock.
The nearly face-on spiral galaxy IC342 (Caldwell 5) in the constellation Camelopardalis. Image credit: Terry Hancock.

The galaxy IC342 ranks as one of the under-appreciated gems of the northern night sky. As you can see in the image above, this elegant nearby spiral galaxy in the far-northern constellation Camelopardalis (the Giraffe) is a photogenic target for experienced imagers. But it’s rather challenging to see visually in all but the darkest skies. It is, however, worth the effort to see this swirling assembly because it lies in an unusually beautiful field of foreground stars [Read more…] about IC342: An Obscured Spiral Galaxy, Hiding in Plain Sight

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The Blinking Planetary Nebula

by Brian Ventrudo Filed Under: Deep Sky

A Hubble Space Telescope image of the Blinking Planetary Nebula NGC 68226 (with additional processing by Judy Schmidt)
A Hubble Space Telescope image of the Blinking Planetary Nebula NGC 6826 (with additional processing by Judy Schmidt)

While the Milky Way along the backbone of the constellation Cygnus, the Swan, offers many fine targets for stargazers, the wings of the constellation are also well worth exploring, especially in the months of July through October when the constellation lies near the meridian. In this short tour, let’s tiptoe through the western wing of the Swan and inspect the remarkable Blinking Planetary, NGC 6826, and a few more intriguing deep-sky objects [Read more…] about The Blinking Planetary Nebula

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Touring the Backbone of Cygnus, the Swan

by Brian Ventrudo Filed Under: Deep Sky

The Milky Way through the constellation Cygnus. The dark cloud bisecting the Milky Way is the Great Rift.
The Milky Way through the constellation Cygnus. The dark cloud bisecting the Milky Way is the Great Rift.

In the late days of northern summer, the constellation Cygnus lies nearly overhead in the mid-evening hours. A long, conspicuous constellation, Cygnus stretches along the diffuse arc of the Milky Way and is packed full of lovely deep-sky objects for stargazers of all skill levels.

Cygnus is an ancient star group and goes back at least 2,000 years. In Greek legend, Cygnus was a friend of Phaeton, the son of Helios, the Sun god. Phaeton met his demise while foolishly trying to drive his father’s sun-chariot across the sky. When Phaeton fell into the river Eridanus, Cygnus begged Zeus to turn him into a swan so he could fly down to retrieve his friend’s body. In doing so, however, he gave up his immortality. Zeus was touched by the selfless act of Cygnus in honoring his friend, so he cast the swan in a place of honor in the night sky [Read more…] about Touring the Backbone of Cygnus, the Swan

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Touring Clusters and Stars in Ophiuchus

by Brian Ventrudo Filed Under: Deep Sky

Messier 12 (credit: Hunter Wilson)
Messier 12 (credit: Hunter Wilson)

As befits a large constellation at the edge of the Milky Way, Ophiuchus is packed with deep-sky sights for observers with small and large telescopes. Open and globular star clusters abound here, along with many fine double stars. Let’s have a short tour of a handful of the highlights of the constellation, moving from easy objects to more difficult sights [Read more…] about Touring Clusters and Stars in Ophiuchus

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