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Messier 5 or M5 (also designated NGC 5904) is a globular cluster in the constellation Serpens. It was discovered by Gottfried Kirch in 1702. It should not be confused with the much fainter and more distant globular cluster Palomar 5, which is situated nearby in the sky.
Spanning 165 light-years in diameter, M5 is one of the larger globular clusters known. The gravitational sphere of influence of M5, (i.e. the volume of space in which stars are gravitationally bound to it rather than being torn away by the Milky Way's gravitational pull) has a radius of some 200 light-years.
At 13 billion years old, M5 is also one of the older globulars associated with the Milky Way Galaxy. Its distance is about 24,500 light-years from Earth and the cluster contains more than 100,000 stars, as many as 500,000 according to some estimates.
M5 is, under extremely good conditions, just visible to the naked eye as a faint "star" near the star 5 Serpentis. Binoculars or small telescopes will identify the object as non-stellar while larger telescopes will show some individual stars, of which the brightest are of apparent magnitude 12.2.
M5 was discovered by the German astronomer Gottfried Kirch in 1702 when he was observing a comet. Charles Messier also noted it in 1764, but thought it a nebula without any stars associated with it. William Herschel was the first to resolve individual stars in the cluster in 1791, counting roughly 200.
Credit: NASA/STScI/WikiSky
For the Messy Desk Contest www.flickr.com/groups/565582@N21/
I'm embarrassed to say this IS my desk... so much clutter, it's driving me nuts.
M53 - NGC5024 - a globular cluster in Coma Berenices constellation.
Telescope: Celestron C8 Schmidt-Cassegrain
Mount: NEQ6Pro
Camera: Canon 550D
Exposure: 12x35s at ISO6400
I had to take a photo before I cleaned up, I couldn't help myself. This is what I've been working in over Spring Break.
Photograph of the open star cluster Messier 35 (M35). Naturally, other objects are also visible: NGC 2158 as a brown spot above M35, the nebula NGC 2175 in the upper right corner, and the nebula IC 443 as a faint pink arc between two golden stars. Photographed with a Pentax K-5, 100mm lens, f/4.5, ISO 800. The photograph is the result of 81 individual exposures of 45 seconds each.
02/03/2025, Hotnja
Our Daily Challenge
Theme: Opposite
Whenever I do an art project or cook I am one of the messiest people that you will ever meet. What is the fun in being clean when you do a project? Might as well get down and dirty with it. People that know me see me with blue hands and usually shake their head and laugh. They know me. So the opposite of clean is MESSY and that is how I roll.
Edited Hubble Space Telescope image of the globular cluster M92.
Original caption: This striking new NASA/ESA Hubble Space Telescope image shows a glittering bauble named Messier 92. Located in the northern constellation of Hercules, this globular cluster — a ball of stars that orbits a galactic core like a satellite — was first discovered by astronomer Johann Elert Bode in 1777. Messier 92 is one of the brightest globular clusters in the Milky Way, and is visible to the naked eye under good observing conditions. It is very tightly packed with stars, containing some 330 000 stars in total. As is characteristic of globular clusters, the predominant elements within Messier 92 are hydrogen and helium, with only traces of others. It is actually what is known as an Oosterhoff type II (OoII) globular cluster, meaning that it belongs to a group of metal-poor clusters — to astronomers, metals are all elements heavier than hydrogen and helium. By exploring the composition of globulars like Messier 92, astronomers can figure out how old these clusters are. As well as being bright, Messier 92 is also old, being one of the oldest star clusters in the Milky Way, with an age almost the same as the age of the Universe. A version of this image was entered into the Hubble’s Hidden Treasures image processing competition by contestant Gilles Chapdelaine. Links Gilles Chapdelaine’s Hidden Treasures entry on Flickr
Getting too messy during the finals! A final paper for submission... along with many things to do, and the result no place for me to move! I should have taken a larger shot showing the floor! lol
The Butterfly Cluster (cataloged as Messier 6 or M6, and as NGC 6405) is an open cluster of stars in the constellation of Scorpius. Its name derives from the vague resemblance of its shape to a butterfly.
The first astronomer to record the Butterfly Cluster's existence was Giovanni Battista Hodierna in 1654. However, Robert Burnham, Jr has proposed that the 1st century astronomer Ptolemy may have seen it with the naked eye while observing its neighbor the Ptolemy Cluster (M7). Charles Messier catalogued the cluster as M6 in 1764. It was not till the 20th century that star counts, distance, and other properties were measured.
Most of the bright stars in this cluster are hot, blue B type stars but the brightest member is a K type orange giant star, BM Scorpii, which contrasts sharply with its blue neighbours in photographs. BM Scorpii, is classed as a semiregular variable star, its brightness varying from magnitude +5.5 to magnitude +7.0.
Estimates of the Butterfly Cluster's distance have varied over the years, with a mean value of around 1,600 light years, giving it a spatial dimension of some 12 light years. Modern measurements show its total visual brightness to be magnitude 4.2.