Messier 92 (M 92) is a globular cluster of stars in the constellation Hercules, about 26,740 light years from Earth.
Messier 92 (M 92) is a globular cluster of stars in the constellation Hercules, about 26,740 light years from Earth. It’s one of the brightest globular clusters in the Milky Way. These ancient, giant clusters can contain tens of thousands to millions of stars, packed tightly together in dense clumps. They can survive for billions of years and can be found throughout the halo of our Milky Way galaxy.
M 92 is a very tightly packed cluster, containing roughly 330,000 stars in total. M92 is visible in the summer sky for observers at mid-northern latitudes. It can be seen with 10 × 50 binoculars, and a small telescope can resolve the outlying stars in the cluster. This image was created using a f8 GSO 8 inch Ritchie Creighton telescope and a ZWO ASI071MC pro astrophotography camera. 157 60s subs imaged May 1st, 2024. Image capture by APT Astro Photography Tool. Image processing with PixInsight.
During our spring season here in NC I like to image galaxies and globular star clusters. There are so many to choose from I generally am only able to spend a single night on a cluster. This one is nice. I particularly like the Red and Yellow stars found within the image in contrast to the hot blue stars.
Messier 5 (M5) (also known as NGC 5904 or the Rose Cluster) is a globular star cluster in the constellation Serpens Caput (the Serpent’s Head) that’s visible from the Northern Hemisphere. It’s one of the largest and oldest globular clusters in the Milky Way galaxy, containing over 100,000 stars in a region about 165 light-years in diameter. M5 is located 24,500 light-years away from Earth and has an apparent magnitude of 6.7. It appears as a patch of light with binoculars and is best viewed during July.
M5 is a good target for beginner astro-photographers and is well known among visual astronomers as one of the best clusters to observe in the night sky. A 150–200mm (six- to eight-inch) telescope can provide a memorable view, allowing you to see individual stars across a roughly 10 arcminute-sized sphere and more or less all the way down to M5’s core. M5 makes an epic imaging target, especially for long focal length telescopes. This image was taken with an 8 inch Ritchie-Creighton telescope and a ZWO ASI071MC Pro astrophotography camera. – 61 120″ images combined.
Also in this image is IC 4537, a lenticular galaxy of type S0-a in the Serpens constellation, located 736 million light-years from the solar system. It has a surface brightness of magnitude 23.9, a Right Ascension of (15 hours: 17.5 minutes) and Declination (+0.2 degrees : 02 minutes). IC 4537 is located near the celestial equator and a few miles away from the globular cluster, Messier 5. (Top enter of this image)
M101 – The Pinwheel Galaxy – is a face-on spiral galaxy 21 million light-years away from Earth in the constellation Ursa Major (Big Dipper). Located just west of the last star in the handle.
M101 is a large galaxy containing approx 1 trillion stars, with a diameter of 170,000 light-years. By comparison, the Milky Way has a diameter of between 100,000 and 120,000 light-years.
M101 has a high population of H II regions, many of which are very large and bright. H II regions usually accompany the enormous clouds of high density molecular hydrogen gas contracting under their own gravitational force where stars form. H II regions are ionized by large numbers of extremely bright and hot young stars; those in M101 are capable of creating hot superbubbles. In a 1990 study, 1,264 H II regions were cataloged in the galaxy. Three are prominent enough to receive New General Catalogue numbers—NGC 5461, NGC 5462, and NGC 5471.
There are at least 4 different galaxies resolved within this image. M101 is the largest and closest. NGC5474 is at the lower left. NGC5477 is above the bottom arm of M101 and appears equally distant between the two yellow stars. NGC5473 is at the far left of the image in the middle.
Image acquisition via APT using a SW Esprit120ED, ASI2600MC Pro, OPT L-Pro filter, & EQ6r Pro mount from my backyard in the hills of western NC.
Messier 13 (M13) is a globular cluster of over 100,000 stars in the constellation Hercules.
It’s located about 22,180 light years from Earth, and is 11.66 billion years old. M13 is one of the brightest star clusters visible from the Northern Hemisphere.
This image consists of 291 60s subs taken with a ZWO ASI071MC Pro camera and Antlia Quad-band light pollution filter. Telescope is a GSO RC8 at 1627mm FL, EQ6r Pro GEM mount. APT is my image capture software. PixInsight is my image processing software.
Messier 104, also known as the Sombrero Galaxy, is an edge-on spiral galaxy in the Virgo constellation. It’s 28 million light-years away, 50,000 light-years across, and has a mass of 800 billion suns. It’s the brightest galaxy within a 32.6 million light-year radius of the Milky Way.
The Sombrero Galaxy is named for its resemblance to a Mexican hat, with a broad rim and high top. It’s best seen with small telescopes during the months of March, April, and May.
The galaxy has a supermassive black hole at its center. Hubble observations also reveal that the Sombrero Galaxy has nearly 2,000 globular clusters, which is 10 times more than in our galaxy. French astronomer Pierre Méchain discovered the Sombrero Galaxy in 1781, but it wasn’t included in Messier’s original catalog.
Stars The Sombrero Galaxy contains several hundred billion stars, about 100 times as many stars as there are people today on Earth.
Globular clusters The Sombrero Galaxy has an estimated 2,000 globular clusters, 10 times as many as orbit our Milky Way galaxy.
Dust lane The Sombrero Galaxy’s most striking feature is the dust lane that crosses in front of the bulge of the galaxy. This dust lane is actually a symmetrical ring that encloses the bulge of the galaxy.
Sh2-274, also known as the Medusa Nebula or Abell 21, is a planetary nebula in the constellation Gemini.
It is located 1,500 light-years away and has an estimated diameter of 4 light-years. The nebula is around 8,800 years old and was discovered in 1955 by UCLA astronomer George O. Abell
A planetary nebula is a region of cosmic gas and dust formed from the cast-off outer layers of a dying star. Despite their name, planetary nebulae have nothing to do with planets.
When stars with an intermediate mass (greater than 80% of the Sun’s mass, but less than eight times its mass) die, they expand to form red giants. The dying star will continue to expel gas, whilst simultaneously the remaining core of the star contracts and temporarily begins to radiate energy again. This energy causes the expelled gas to ionise, meaning that the atoms and molecules in the gas become charged and begin to emit light. The cast-off glowing gas is known as a planetary nebula. Therefore, planetary nebulae are classified as emission nebulae, and are entirely unrelated to planets.
The misnomer came about because of a historical misclassification. 250 years ago, astronomers thought they were looking at gas planets when they observed the colourful spectacle of planetary nebulae through their less powerful telescopes. Planetary nebulae only last for about 20 000 years, making them a very short-lived part of the stellar life cycle.
Messier 92 (M92) is a globular cluster of stars in the constellation Hercules, about 26,740 light years from Earth. It’s one of the brightest globular clusters in the Milky Way, with an apparent magnitude of 6.3, and can be seen with the naked eye in good observing conditions.
M92 is very tightly packed with stars, containing roughly 330,000 stars in total. M92 is visible in the summer sky for observers at mid-northern latitudes. It can be seen with 10 × 50 binoculars, and a small telescope can resolve the outlying stars in the cluster.
M92 is a great target for beginner Astro photographers and stays high in the sky for several months. John Herschel described it as a “globular cluster; very bright; very large; extremely compressed toward the middle; well resolved; small stars”
I like the Red and Yellow stars found within the image.
Imaged with a Sky Watcher Esprit 120ED and a ZWO ASI2600MC Pro camera riding a Sky Watcher EQ6r Pro mount. 256 60s subs. Image capture by APT Astro Photography Tool. Image processing with PixInsight.
Sh2-302, also known as the Snowman Nebula, is a red emission nebula located in the constellation Puppis, about 5,800 light years away. It’s part of the Gum Nebula, which occupies the lower southern skies in winter. The nebula has a visual diameter of 15 arc minutes and is located near the boundary between Puppis and Canis Major.
Sh2-302 is one of many objects in a catalog compiled by astronomer Stewart Sharpless to identify areas of interstellar ionized hydrogen, or HII regions.
I captured this photograph Feb 18, 2024 and March 13, 2024 using a Skywatcher Esprit 120ED telescope at a fl of 840mm and a ZWO ASI071MC Pro astrophotography camera with an Antlia quad-band light pollution filter. These are mounted on a Skywatcher EQ6r Pro German Equitorial Mount. The image acquisition software that controls everything is APT (Astro Photography Tool). Total exposure of 4.4 hrs. 75 exposures were integrated and processed using Pixinsight.
The M81 galaxy group is a group of over 40 galaxies
The M81 galaxy group is a group of over 40 galaxies located in the constellations Ursa Major and Camelopardalis. The group includes the galaxies Messier 81, Messier 82, and NGC 3077 which are found in this image. The M81 group is one of the closest galaxy groups to the Local Group, which includes the Milky Way, Andromeda, and Triangulum galaxies. The M81 group is about 12 million light-years from Earth.
This image consists of 215 3 minute exposures captured using APT with guiding by PHD2 from the end of January 2024. I imaged this when the moon loomed high in my sky. SkyWatcher Esprit 120ED telescope paired with the ZWO ASI2600MC camera and the Antlia quadband light pollution filter. An annotated version is available on my Astrobin page here.
Bode’s Galaxy, or Messier 81 (M 81), is a spiral galaxy in the constellation Ursa Major. It’s about 11.8 million light-years away from Earth and has an apparent magnitude of 6.94. M81 is one of the brightest galaxies in the night sky and is visible with binoculars or a telescope. Its size and well-defined spiral arms make it an enjoyable sight. M81 is nicknamed “Bode’s Galaxy” after it was discovered by German astronomer Johann Elert Bode in 1774.
Messier 82 (M82) is a spiral galaxy located in the constellation Ursa Major, about 12 million light-years away from Earth. It’s also known as the Cigar Galaxy because it’s undergoing a burst of star formation in its core. M82 is the second-largest member of the M81 Group, with a mean radius of 18,500 light-years. The galaxy’s center is forming stars 10 times faster than the Milky Way due to gravitational interactions with its neighbor galaxy, M81. M82’s star formation powers a bipolar superwind that originates near the core of the galaxy. The superwind compresses enough gas to trigger the ignition of millions more stars. The galaxy also expels violent winds that blow gas and dust out of the galaxy. In visible light, the only hint of M82’s star formation is fountains of hot hydrogen gas streaming out of its disk.
NGC 3077 is a small, disrupted elliptical galaxy in the constellation Ursa Major. It is a member of the M81 group of galaxies and is located about 13 million light-years away from Earth. At first glance NGC 3077 looks like a typical, relatively peaceful elliptical galaxy. However, it is actually a hotbed of very energetic star formation and the whole galaxy is laced with dusty tendrils. Despite being similar to an elliptical galaxy in appearance, it is peculiar for two reasons. First, it shows wispy edges and scattered dust clouds that are probably a result of gravitational interaction with its larger neighbors, similar to the galaxy M 82. Second, this galaxy has an active nucleus.
Sometimes you are pleasantly surprised by what comes from these reflection nebula. Other times not so much. This image was centered on VdB 27 (catalogued also as Ced 31) – a small reflection nebula in the constellation Taurus. The nebula is illuminated by the radiation of the variable star RY Tauri.
All the image acquisition info, along with an annotated version of this image, is here in my Astrobin page. A dark nebula (B 214) and a bright nebula (LBN 785) along with a few stars.
This small reflection nebula is usually captured as part of a wide field image of this part of the Taurus Molecular cloud. From my driveway here in the hills of NC, I chose to narrow that view a bit and image it with a RC8 at a focal length of 1628mm using the ASI071MC Pro camera with a Antlia Quadband light pollution filter.
This is 110 3 minute exposures taken Feb 13 and 14, 2024 for 5.5 hours of total exposure.
