Tuesday, 14 May 2019 23:54

Messier 3

Messier 3 is one of the largest, brightest globular cluster in the night sky. It contains an estimated 500,000 stars. Located in the constellation of Canes Venatici at a distance of 33,900 light years away from Earth. The cluster contains more than 274 variables stars, with most of them being the RR Lyrae type of variable.

Published in Globular Clusters
Wednesday, 10 October 2018 12:47

Messier 15

M15 is a globular cluster located in the constellation of Pegasus. It consists of an estimated 100,000 stars and has a very dense central core having undergoing a core collapse where stars migrate towards the center. It's age is estimated at 12 billion years and is located 33,600 light years away.

Cataloged by Charles Messier in 1764 in his catalog of comet like objects.

Imaged with the ES127 refractor and Atik314L+ mono ccd camera.

Published in Globular Clusters
Friday, 15 June 2018 22:11

Messier 4

M4 is one of the closer globular clusters to Earth at only 7,200 light years away. Located in the constellation of Scorpius, not far from the red super giant star Antares. It is distinguished by an optical bar of stars running through the central part of the core. A relative small globular as globular clusters go with only ten's of thousands stars, it may have been more massive in its past as it's orbit takes it through the Milky Way disk, where it loses stars due to tidal shock.

Imaged with the ES 127 refractor and the Atik 314l+ ccd camera.

Published in Globular Clusters
Thursday, 26 April 2018 14:47

NGC 2419

Nicknamed the Intergalactic Wanderer because it was originally thought not to be in orbit around the Milky Way galaxy. The globular cluster is located 300,000 light years the galactic center, which is further away than the Large and Small Magellanic satellite galaxies of the Milky Way galaxy. If not for the extreme distance, it would be one of the larger, brightest globular clusters visible. It is estimated it takes 3 billion years to complete an orbit around our galaxy. 

Published in Globular Clusters
Friday, 30 March 2018 16:51

Great Globular Cluster in Hercules

Discovered by Edmond Halley in 1714, and added to the Messier catalog by Charles Messier in 1764. It is one of the best know and brightest globular clusters visible in the northern hemisphere.

The cluster contains an estimated 300,000 stars stretching across a diameter of 145 light years. Globular clusters tend to be quite old objects with their stars containing very little of the metal elements.

Published in Globular Clusters
Saturday, 10 March 2018 01:32

Omega Centauri

Omega Centauri appears to be a globular cluster located in the skies of the southern hemisphere. It can be barely visible rising just above the horizon from southern locations in the northern hemisphere. This image was imaged from a remote scope located in Australia where rises high in the night sky. It is one of the biggest and brightest of the globulars associated with the Milky Way galaxy. It is thought however, that it might not be an actual globular cluster, its characteristics resemble a disrupted core of a dwarf galaxy that was disrupted by the Milky Way.

Published in Globular Clusters
Saturday, 21 October 2017 16:03

NGC 185

Dwarf spherical galaxies are not the most photogenic of galaxies, but sometimes I like to image stuff off the beaten track to see what I can find.

 

I was able to track down and identify some of the globular clusters that surround this galaxy. One of these, FJJ-VI was originally classified as a globular, but later studies by Hubble point to it being a distant elliptical galaxy. The color is noticeable much more reddish. FJJ-II is listed at 19.7 magnitude in the visual band.

 


NGC 185 is a satellite of the Andromeda along with its close neighbor dwarf elliptical galaxy NGC 147 (not visible in this field of view). Unlike its neighbor, NGC 185 still has star formation and has an active galactic nucleus, and visible molecular clouds in its nucleus.
Distance to NGC 185 is 2 million light years and is located in the constellation of Cassiopeia.

Imaged with the RC10 telescope.

Published in Galaxies
Wednesday, 05 July 2017 16:07

Messier 13, July 4th Edition

Celebrated the July 4th holiday by imaging one of the brightest and best known globular cluster visible in the northern hemisphere. M13 contains an estimated 300,000 stars. Often called the Great Globular Cluster in Hercules, it is conveniently located in the constellation of Hercules. The cluster was described by Edmond Hally in 1714, and was added to  Charles Messier's catalog on June 1, 1764. In 1974 a radio message was sent in the direction of M13 from the Arecibo radio observatory, but don't expect a reply as it would take 25,000 years to get there, and another 25,000 for a reply. Also by that time, both the cluster and the solar system will have moved due to their orbits around the galaxy. Also globular clusters tend to consist of old stars that have very little metal content to form planets that have metals that we find so useful here on Earth.

Imaged with the RC10 scope and the ZWO 1600 MMC mono camera.

 

Published in Globular Clusters
Friday, 09 September 2016 15:44

Baade's Window

Baade's window is area of lower amounts of interstellar gas and dust towards the nucleus of the Milky Way Galaxy. First noticed by Walter Baade, this area along with a few others offers a glimpse of the nucleus of our galaxy that is normally blocked by interstellar gas and dust.

 

Published in Stars