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Cat's Eye Galaxy/M94 - The Galaxy with a Double Ring
Messier 94, located in the constellation Canes Venatici, is a dazzling spiral galaxy that captivates observers with its unusually bright, circular core. Shining at magnitude 8.2 and lying about 16 million light-years away, M94 is famous for its compact, glowing nucleus surrounded by tight inner spiral arms—an appearance that has earned it the nickname “the Cat’s Eye Galaxy.”

What makes M94 especially enticing is its unique double-ring structure: a bright, star-forming inner ring that almost looks like a glowing halo, and a much fainter outer ring that fades into the darkness. In small telescopes, M94 appears as a bright oval haze with a concentrated core, while larger scopes begin to hint at the surrounding spiral arms and outer disk.

Easily found near the bright star Cor Caroli, M94 is a rewarding target for springtime observing. It offers both a photogenic core and an intriguing structure that stands out from more diffuse spiral galaxies. Whether you’re a casual stargazer or a seasoned deep-sky observer, this galaxy provides a luminous and fascinating glimpse into the dynamic heart of another star system.


Cat's Eye Galaxy/M94
Rating: 🔵 Stagazer FavoriteLevel: 🔵 EasyHow: When: Feb - Jul
🌟 A Brilliant Core That Pops in Any Telescope
M94’s intensely bright nucleus is easily seen in even small telescopes. Its compact, circular glow makes it stand out clearly from the background sky, offering instant satisfaction without the need for dark adaptation or averted vision. It’s a great target for beginners and veterans alike.
🌟 Unusual Ring Structure Sets It Apart
Unlike most spirals, M94 features a prominent inner star-forming ring, creating the illusion of a double nucleus or glowing halo around the core. Its rare, layered appearance offers something visually and scientifically different from typical spiral galaxies—especially intriguing in photographs or larger apertures.
🌟 Easily Located in a Quiet Patch of Sky
M94 is only about 3 degrees east-northeast of the bright star Cor Caroli, making it easy to find even with a small telescope or finder scope. Its location in Canes Venatici also means it rides high in spring skies, away from the thick atmospheric distortion near the horizon.
🌟 Ideal for Urban and Suburban Skies
Thanks to its high surface brightness, M94 remains visible even under moderate light pollution. While darker skies reveal more of its outer structure, the bright core and inner ring still show well from cities and suburbs, making it a reliable galaxy for less-than-ideal conditions.
🌟 A Great Galaxy for Imaging or Sketching
Astrophotographers and sketchers will enjoy M94’s contrast-rich structure. Long exposures reveal faint outer spiral arms and complex dust lanes that are easily overlooked visually. The central ring glows brightly, making it an eye-catching feature for any deep-sky portfolio.
🌟 Scientifically Fascinating
M94 isn’t just beautiful—it’s astrophysically interesting. The inner ring is a region of intense star formation, while the galaxy’s outer regions may be expanding or evolving differently. Studying it offers insights into how galaxies form and organize themselves over time.
Cat's Eye Galaxy/M94
NamesCat's Eye Galaxy, Messier 94, NGC 4736ConstellationCanes VenaticiDistance14 million ly
RA, Dec12h 52m 06s, +40° 58' 51"Angular Size7.7' x 6.7'Magnitude+8.2
Angular
Size
vs
Moon
DSO TypeSpiral galaxy: a galaxy with a flat, rotating disk of stars, gas, and dust, featuring winding spiral arms and a central bulge.
Cat's Eye Galaxy/M94
The easiest way to find Messier M94 is by using the Big Dipper as your guide. Because of its brightness and close proximity to Cor Caroli, M94 is one of the easier galaxies to hop to and enjoy.
Find the Big Dipper. Then find Cor Caroli (+2.89) and much dimmer Chara (+4.25) below the Big Dipper's handle. These are the two main stars of the constellation Canes Venatici.
In this step, you'll point your telescope to M94. Here are two options for doing this:
Option 1: Using a telescope finder, point to the location of M94. It is about halfway between Cor Caroli and Chara and about 1.5° above a line that connects the two stars.
Option 2: Using a telescope finder, point to Cor Caroli. Then, using a finder or low-powered eyepiece, hop about 3° to M94. This is a short hop—just over half the width of a typical finder scope’s field of view.
In a telescope or finder scope, M94 will appear as a compact, circular glow with a noticeably bright core. Once found, center it in your eyepiece and increase magnification to begin teasing out its structure.
Cat's Eye Galaxy/M94
Start with Low to Medium Power
Begin with a low magnification (50–75x) to locate M94, then increase to around 100–150x to bring out the bright core and faint halo. The nucleus is small but very intense, and higher power helps separate it from the surrounding sky.
Observe from Suburban or Darker Skies
M94’s core is bright enough to pierce moderate light pollution, but its faint outer ring is best seen from darker skies. Under Bortle 4 or better, the galaxy’s full structure begins to emerge.
Let Your Eyes Adapt
Spend 15–20 minutes in the dark before observing. This improves your ability to detect the galaxy’s outer halo, which can be subtle compared to the glowing inner region.
Use Averted Vision for Fainter Details
Looking slightly off to the side of the core helps reveal M94’s diffuse outer arms and faint extensions. Averted vision increases sensitivity to low-contrast features.
Use Cor Caroli as a Guide
Find the bright star Cor Caroli in Canes Venatici, then move a few degrees east-northeast. M94 is easy to spot with a finder scope or low-power eyepiece once you’re in the right area.
Revisit Under Different Conditions
Try observing M94 on nights with better transparency or less moonlight. Its layered structure becomes more impressive when skies are crisp and dark.
Cat's Eye Galaxy/M94
Naked Eye
With the naked eye, Messier 94 is not visible. At magnitude 8.2, it lies well below the threshold of human vision without optical aid, even under pristine skies.
⚠️ Binoculars
Through binoculars, M94 may appear as a very faint, star-like blur in dark skies, but its structure is mostly lost. It blends into the star field of Canes Venatici and is difficult to distinguish without prior knowledge of its exact position.
Small Telescope
In a small telescope, around 3 to 4 inches in aperture, M94 becomes much easier to detect. The galaxy presents itself as a small, bright, circular glow with a sharply defined core. While the outer ring remains elusive, the concentrated central region stands out clearly against the background sky.
Medium Telescope
A medium telescope in the 6- to 8-inch range reveals more detail. The nucleus remains extremely bright, but now a faint halo surrounding it becomes visible. With good seeing and dark skies, the subtle contrast between the inner ring and the surrounding structure begins to emerge.
Large Telescope
In a large telescope, 10 inches or more, M94 becomes a far more intricate object. The central glow remains dominant, but the faint outer spiral arms and dust lanes begin to show. Observers may detect a layered structure, with the inner ring appearing as a distinct, bright disk set within a dimmer, more diffuse envelope, giving the galaxy its unusual, double-ringed appearance.
Cat's Eye Galaxy/M94
Messier 94 remains visible in light-polluted skies thanks to its bright core, but its full structure—especially the faint outer ring—requires dark skies to truly appreciate. Bortle 1–4 skies provide the best experience.
🟣 In Bortle 1–2 skies, Messier 94 is striking. Its bright core is crisp and obvious, and the faint outer ring and halo begin to reveal themselves with careful observation. Subtle structure around the inner disk is visible, offering a rich and layered appearance.
🔵 In Bortle 3–4 skies, the core remains vivid, and a soft halo is still detectable. The outer ring is much more subdued and may require averted vision and higher magnification to hint at its presence, but the galaxy still holds strong visual appeal.
🟢 In Bortle 5–6 skies, M94 loses much of its outer detail. The bright nucleus is still clear and easy to observe, but the surrounding disk fades into the background. The galaxy appears smaller and less dynamic, with little sense of layered structure.
🟠 In Bortle 7+ skies, M94 is reduced to a small, soft glow with a prominent core. It is still visible, but the outer features are completely lost to skyglow. The object appears more like a fuzzy star than a complex spiral galaxy.