New Telescope First Light: Seeing M51 in a New Way
This image marks first light with my new telescope, the Celestron EdgeHD 800, an 8-inch Schmidt-Cassegrain designed for longer focal length imaging. With a native focal length of 2000mm, and about 1422mm using a 0.7x reducer, this setup operates in a very different range than my previous Redcat 61 telescope (300mm). It’s built to resolve smaller targets with higher precision, using a flat-field optical design that keeps stars sharp across the entire frame. It also gathers over 2.5x more light than a typical 60mm refractor, which becomes noticeable when working on faint structure. Not Just Zooming In This wasn’t my first time imaging the Whirlpool Galaxy. My earlier image (below) was taken with a RedCat 61 at around 300mm focal length. At that scale, the galaxy obvious but small and blurry. You see the overall spiral shape, the companion galaxy, and the sense that something is happening between them. It’s a very zoomed in sample of the wide-field view. With my new EdgeHD 8” and reducer at about 1422mm, the galaxy fills much more of the frame, revealing detail that wasn’t visible before. It might seem like simple magnification, but it’s really about resolving finer structure. Now the spiral arms aren’t just visible, they’re resolved. Dust lanes begin to cut through the structure. Bright star-forming regions show up as distinct knots instead of blended patches. The bridge of material connecting M51 to NGC 5195 becomes more obvious, making the interaction easier to see. What the Telescope Change Actually Did Switching from a small refractor to a longer focal length reflector changes what you can extract from a target like this. The RedCat 61 excels at wide frame imaging. It captures the scene cleanly and efficiently, especially under less-than-perfect conditions. But it doesn’t have the reach to pull out fine structure in smaller galaxies. The EdgeHD 8” operates in a different range. At over 1400mm, it demands more from tracking, focus, and seeing, but the payoff is immediate. Structure becomes separation. Texture replaces blur. The galaxy starts to break down into individual features rather than appearing as a single object. With this setup, targets that were previously too small to resolve well are now within reach. That opens the door to more galaxy imaging, revisiting past targets with greater detail, and even some planetary work down the line. The Whirlpool Galaxy The Whirlpool Galaxy (M51) stands out among galaxies for its clearly visible spiral structure and its interaction with a nearby companion galaxy. Located about 23 million light-years away in the constellation Canes Venatici, sitting just above the asterism of the Big Dipper’s handle, it was first recorded by Charles Messier in 1773. Two sweeping arms wrap around a bright core, with a smaller companion galaxy, NGC 5195, hanging just off one side and gravitationally tugging at those arms. What Gives M51 Its Structure M51’s shape comes from its ongoing interaction with NGC 5195. As the smaller galaxy moves around it, it pulls on the stars and gas, organizing them into the spiral pattern we see. Those arms aren’t fixed structures. They’re regions of compression moving through the galaxy, where gas gets squeezed and new stars form. The bluish regions scattered along the arms are clusters of young, hot stars. The reddish patches are hydrogen gas clouds, known as HII regions, where new stars are actively forming. Across the image, you’re seeing different stages of stellar evolution playing out over tens of thousands of light-years. Plenty of new images to come with the new telescope!
Galaxy Portraits: A Collection of Distant Worlds
Galaxies I’ve Captured Over the Past Two Years I don’t have the ideal telescope focal length for imaging tiny galaxies. My current setup is a wide-field telescope, which is great for big nebulae but makes most distant galaxies appear small. In the future I plan on adding a longer focal length scope to get closer, more detailed views. For now, I’m excited to share the smaller galaxies I’ve imaged over the past two years with my modest astrophotography rig. All these photos were taken with the same equipment – see my section on equipment for more detail – and in my backyard under suburban skies. Despite the challenges, each galaxy revealed some of its unique details after careful long exposures and stacking. Galaxies come in a variety of types and sizes, and this collection covers a broad sample. You’ll see spiral galaxies (like M51 and M81) which are rotating disks of stars with winding arms, an elliptical galaxy (M84 in Markarian’s Chain) which is a more rounded system of older stars with little new star formation, and even a starburst galaxy (M82) undergoing intense stellar production. There are also interacting galaxies tugging on each other gravitationally, and entire galaxy groups and clusters (Markarian’s Chain in the Virgo Cluster, and the distant Leo Cluster). The sections below breakdown a variety of different galaxies I captured along with some interesting facts and notes on the imaging process. Enjoy! Messier 51 – The Whirlpool Galaxy The Whirlpool Galaxy (Messier 51), is a face-on spiral galaxy famous for its well-defined spiral arms. It lies about 23–31 million light-years away in the constellation Canes Venatici. M51 is a grand-design spiral galaxy – one with prominent and well-defined spiral arms- with a smaller companion galaxy, NGC 5195, tugging at one of its arms. With an apparent magnitude of about 8.4, M51 is bright enough that amateur astronomers can spot its fuzzy glow even in smaller telescopes, so it’s a favorite target for observers and astrophotographers. M51’s spiral arms owe much of their prominence to the gravitational dance with NGC 5195, which is triggering star formation as the two galaxies interact. My wide-field image of M51 doesn’t show individual stars, but the classic two-arm “whirlpool” shape is clearly visible after stacking long exposures. This galaxy’s relatively high surface brightness makes it one of the more forgiving small-galaxy targets to photograph with modest equipment. Still, I look forward to revisiting the Whirlpool Galaxy with a higher magnification setup to reveal finer details in its spiral arms. Messier 81 – Bode’s Galaxy Bode’s Galaxy (Messier 81), is a grand-design spiral galaxy in Ursa Major (aka The Big Dipper). At roughly 11–12 million light-years from Earth, it’s one of the nearest big galaxies beyond our Local Group. M81 spans about 96,000 light years in diameter, similar in size to the Milky Way. This galaxy has a bright nucleus that harbors a supermassive black hole. Thanks to its large size, relative proximity, and overall brightness (around magnitude 6.9), M81 has been studied extensively by professional astronomers and is another popular target. Through my equipment, M81 sits in the same field of view as its companion galaxy M82 (the Cigar Galaxy) mentioned below, and the two have interacted gravitationally in the past. I captured M81 in the spring season when Ursa Major was high in the sky, giving me the best chance at sharp images. I took over 500 five-minute exposures or 40 hours of exposure time over nine nights to stack and produce the image above. It was still a challenge to edit the image. After failing in 2023 and 2024 to produce an image I was happy with, I tried again in 2025 with more exposure time and better editing experience. I was finally able to draw out some of the faint outer spiral arms and show the galaxy’s yellowish core and bluish arms. Messier 82 – The Cigar Galaxy The Cigar Galaxy (Messier 82), is a starburst galaxy also located in Ursa Major, only about 12 million light-years away – essentially next-door to M81. Unlike the grand spiral form of its neighbor, M82 appears as a distorted, edge-on cigar-shaped glow. It is undergoing a frenzy of star formation. Astronomers believe this burst of star formation was triggered by a past close encounter with M81. The gravitational interaction compressed gas in M82, igniting rapid stellar birth. As a result, M82 is about 5 times more luminous than our entire Milky Way despite being much smaller. It’s the prototypical starburst galaxy, with winds of gas blowing out from its core – images in hydrogen-alpha often show reddish plumes from supernova-driven winds. Notably, M82 hosted a bright supernova (SN 2014J) discovered in 2014, and even more recently, in 2020-2023, it’s been the source of unusual flashes like an ultra luminous pulsar and a magnetar flare, highlighting the extreme conditions in this galaxy. In my photograph, M82 appears as a slender, elongated smudge. Pulling out detail in M82 is challenging with a wide-field scope because it’s quite small (about 11′ by 4′ arcminutes in size – Ill do a post on this later!). However, with enough exposure I could enhance the contrast to reveal an orange-reddish hue in the core (indicating the starburst regions rich in hydrogen). This photo of M82 was taken at the same time and within the same frame as M81 above – a total of 40 hours of exposure time. The galaxy’s patchy structure and the dark dust lane bisecting its center became visible. Barely visible is the faint reddish outflow coming from the core (the supernova-driven wind). M82’s high surface brightness helped; at about magnitude 8.4 it stands out well against the background sky. This galaxy, though small in my frame, is one of the most active and interesting objects I’ve imaged, due to its intense star-forming activity and gravitational interaction with M81 nearby. Messier 104 – The Sombrero Galaxy Though very small with my scope, the Sombrero Galaxy (M104), is one of my favorite objects Ive
Andromeda Galaxy Astrophotography: Neighbor to the Milky Way
One of my first deep sky objects to image, the Andromeda Galaxy (M31) is the closest spiral galaxy to our own and on a slow-motion collision course with the Milky Way! I captured this image over several nights, stacking hours of exposure time to bring out the fine details of its spiral arms and glowing core. Target Details Constellation: Andromeda Distance: 2.54 million light years Diameter: 220,000 light years Magnitude: 3.4 Apparent Size: 3.2° x 1° RA 00h 42m 44s, DEC +41° 16′ 06″ Shot Details Dates: October 2023 Integration: 158 x 300″ Total Time: 13h 10′ Telescope: Redcat 61 Camera: ASI 2600mc pro Mount: AM5 About the Target Andromeda is an excellent target due to its impressive size in the sky. Surprisingly, from our perspective, it appears four times larger than the full Moon. However, its faint glow makes it difficult to see its sprawling spiral arms with the naked eye. Through long-exposure photography, its stunning structure comes to life, revealing intricate details and the grandeur of this magnificent galaxy. The Andromeda Galaxy (M31) is on a “slow” (244,800 mph) but inevitable collision course with the Milky Way, a cosmic event set to unfold in approximately 4.5 billion years. As the two galaxies are drawn together by gravity, they will engage in a spectacular merger, reshaping their structures and forming a new, larger galaxy. While this may sound catastrophic, Earth itself is unlikely to be directly affected. The vast distances between stars mean that actual collisions between them are improbable. However, the night sky will dramatically change over millions of years, with Andromeda appearing larger and brighter until the galaxies finally blend into one. Visible in my image are some of Andromeda’s most notable satellite galaxies, including Messier 32 and Messier 110. M32 appears as a small, bright elliptical galaxy nestled just above the core of Andromeda, while M110 is seen below Andromeda as a blurry, elongated satellite. These dwarf galaxies, along with others like NGC 147 and NGC 185, are slowly being influenced by Andromeda’s immense gravitational pull and may eventually be absorbed into its structure. Long-exposure astrophotography like this reveals the incredible details of these galaxies, making their presence and interaction with Andromeda all the more striking. The Andromeda Galaxy (M31) is one of the most exciting and rewarding targets for astrophotography, and it was actually one of the first deep-sky objects I ever captured. Its massive size and relatively bright core make it an ideal subject, even for beginners. Unlike many distant galaxies that require large telescopes and dark skies, Andromeda is bright enough to be photographed with a modest setup, making it a common target in the astrophotography community.