Category: Deepsky TOP 100

Sunday, November 13, 2005
Deepsky Top-100 (17): M 36, the Butterlfy Cluster
Towards the end of the year, Auriga climbs higher and higher in the night sky, and within its borders lie three of my favourite open clusters, M 36, M 37 and M 38. All three open clusters will be included in my Deepsky Top 100, but I will start with M 36, which I observed and sketched this week (8 November 2005).

Le Gentil discovered M 36 in 1749, while he was working as an assistant of Jaques Cassini at the Paris Observatory. Messier observed M 36 on 2 September 1764. It lies in Auriga, near the galactic anticenter, at a distance of 4100 light years. When you look in this direction (Auriga), you look away from the galactic centre, towards the nearest stretch of our galaxy's rim.
Posted by Math on 11/13 at 03:17 PM | (0) Comments | filed in: Deepsky TOP 100 | Print
Wednesday, July 27, 2005
Deepsky Top-100 (16): Beautiful Albireo
In my list of favourite deepsky objects for suburban backyards you will find only a few galaxies. Because of the severe light pollution these delicate structures with low surface brightness visually loose almost all detail or, even worse, aren't visible at all through my 8-inch telescope. I compensate this by adding some beautiful stars, double stars and multiple stars to my Deepsky Top-100.

Posted by Math on 07/27 at 05:17 PM | (0) Comments | filed in: Deepsky TOP 100 | Print
Monday, March 28, 2005
Deepsky Top-100 (15): Stargate, Jaws and M 104

I just added a wonderful trio of deepsky objects to my Deepsky TOP 100, Stargate, Jaws and M 104.

Stargate and Jaws are two asterisms from Phil Harrington’s book “The Deepsky, an introduction”. They will help you to locating M 104, a bright galaxy near the Corvus-Virgo border. All three objects are very easy to locate and recognize, even from a suburban backyard. I found them with my 8-inch in a heavily light polluted southern sky. My advice, get out and hunt them down!

Follow this link to read the full story..........

Posted by Math on 03/28 at 02:03 PM | filed in: Deepsky TOP 100 | Print
Wednesday, November 10, 2004
Deepsky Top-100 (14): NGC 457, The ET Cluster

When you scan Cassiopeia and its neighbouring constellations with binoculars, the star fields in Cassiopeia seem to be much richer than in Perseus and Cepheus. The reason for this is that in the Perseus and Cepheus Milky Way, large nearby dust clouds of our own spiral arm (the Orion arm) block the view, while in the Cassiopeia Milky Way there are no dust clouds to .........follow this link to read the full story.

Posted by Math on 11/10 at 09:01 AM | filed in: Deepsky TOP 100 | Print
Tuesday, July 20, 2004
Deepsky Top-100 (13): M 57, the Ring Nebula

Centred between the constellations of Hercules and Cygnus lies a small constellation with a very distinctive star pattern, Lyra (the lyre). Four stars form the main “body” of the Lyre: Beta, Gamma, Delta and Zeta Lyrae. Together they make a kind parallelogram. At the northwestern corner of this parallelogram a triangle of follow this link to read the full story........

Posted by Math on 07/20 at 05:51 PM | filed in: Deepsky TOP 100 | Print
Tuesday, June 01, 2004
Deepsky Top-100 (12): M 13, the Great Globular Cluster in Hercules

Edmond Halley discovered M 13 in 1714. It is one of the finest globular clusters of the northern celestial hemisphere you can observe from your own backyard. M13 has a visual diameter of 14’ and a visual magnitude of 5.7. The cluster lies at a ..... follow this link to read the full story.

Posted by Math on 06/01 at 03:09 PM | filed in: Deepsky TOP 100 | Print
Monday, May 10, 2004
Deepsky Top-100 (11): Y Canum Venaticorum or La Superba

In Canes Venatici, the hunting dogs, you can find a beautiful red star, Y Canum Venaticorum, or “La Superba”. Y CVn is a carbon star. Most of these class C stars are evolved cooling giants with a large abundance of carbon dust in their outer shells. The apparent red color of carbon stars is caused by the carbon molecules (Carbon Monoxyide, Cyanogen, etc) in the outside layers of........ follow this link to read the full story

Posted by Math on 05/10 at 10:35 AM | filed in: Deepsky TOP 100 | Print
Sunday, April 18, 2004
Deepsky Top-100 (10): M 81 and M 82

Spring is a great time for observing galaxies, but you have to go to a dark sky site, to really find and enjoy them. There are however a few galaxies that can be seen from my light-polluted, suburban backyard. M 81 and M 82 in Ursa Major are..........follow this link to the deepsky section and read the full story.

Posted by Math on 04/18 at 06:14 PM | filed in: Deepsky TOP 100 | Print
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