Messier 64, famously known as the Black Eye Galaxy or Sleeping Beauty Galaxy, is a striking spiral galaxy in the constellation Coma Berenices, about 17 million light-years away. What makes it irresistible to stargazers is its dramatic appearance—it features a bright core partially veiled by a dark, curved dust lane—giving it the dramatic appearance of a black eye. This gives the galaxy its nickname and makes it one of the most distinctive spirals visible in amateur telescopes.
Shining at magnitude 8.5, M64 is well within reach of small to medium telescopes under dark skies. Even in modest apertures, its round glow and bright core are evident, and under good conditions, that curious dark patch—like a cosmic bruise—may begin to tease into view. Larger scopes and high contrast can reveal the full sweep of its inner spiral structure and the asymmetry that hints at a fascinating past: M64 is the result of a galactic merger, and its inner stars rotate in one direction while the outer gas rotates in the opposite.
For the stargazer, M64 offers more than just beauty—it’s a rare chance to see galactic turbulence frozen in time, all through the eyepiece. Whether you’re observing for structure or simply drawn to objects with personality, the Black Eye Galaxy is a must-see springtime gem that rewards patient viewing.
Black Eye Galaxy/M64
Rating: 🔵 Stagazer Favorite
Level: 🟢 Moderate
How:
When: Feb - Jun
🌟 A Striking Visual Feature: The “Black Eye” Unlike many galaxies that require imagination to discern structure, M64 shows off a bold, dark lane across its bright core. This dramatic contrast is visible in medium-sized telescopes and gives the galaxy a unique, eye-like appearance. It’s an especially satisfying target because the feature that makes it famous is within reach of amateur observers.
🌟 Accessible and Bright At magnitude 8.5, M64 is bright enough to be seen in small telescopes under reasonably dark skies. Its compact size—about 10 arcminutes across—makes it easy to frame and explore without needing a large field of view. For stargazers working with 4- to 8-inch scopes, M64 offers a galaxy experience that feels intimate and accessible.
🌟 Visible Structure Even in Modest Telescopes In addition to its central dust lane, M64 has a sharply defined core surrounded by a faint halo that becomes more detailed with increased aperture. In 6-inch and larger scopes, careful observation may reveal subtle texture in the outer spiral arms, especially under steady seeing. It’s a galaxy that deepens the more you look.
🌟 Fascinating Galactic History M64 isn’t just a pretty face—it’s a galactic oddity. Its inner stars and outer gas clouds rotate in opposite directions, likely the result of a long-ago collision with a smaller galaxy. This makes it a compelling object from a scientific perspective and adds intrigue to your observing session. You’re not just seeing light—you’re witnessing aftermath.
🌟 Springtime Showpiece in Coma Berenices Rising high in the sky during spring months, M64 is well-placed for comfortable evening observing in the Northern Hemisphere. It’s also located in a rich galactic neighborhood, allowing observers to pair it with other targets like M53, M94, or the Virgo Cluster for a galaxy-hopping session.
🌟 Photogenic and Rewarding for Imaging For astrophotographers, M64 offers high contrast and a beautifully symmetrical structure, making it a rewarding subject even for modest imaging setups. The dark dust lane and surrounding star field photograph well, providing excellent opportunities for both short exposures and deep integrations.
Black Eye Galaxy/M64
Names
Black Eye Galaxy, Sleeping Beauty Galaxy, Messier 65, NC 4826
Spiral galaxy: a galaxy with a flat, rotating disk of stars, gas, and dust, featuring winding spiral arms and a central bulge.
Black Eye Galaxy/M64
From the end stars of the handle of the Big Dipper, Alkaid (+1.86) and Mizer (+2.22), hop to very bright Arcturus (+0.15) in Bootes.
Hop from Arcturus to Murphid (+2.68) and continue in the same direction another 11° to dim Diadem (+4.32) in Coma Berenices. Then find the other two main stars of Coma Berenices, Beta Com (+4.25) and Gamma Com (+4.34).
Now for the moderately difficult part. If your skies are dark enough, find even dimmer 35 Com (+4.92) 5° from Diadem. If you can't find it, simply estimate its position. Then, using binoculars or a telescope finder, point to Diadem. Finally, using binoculars, an optical finder or a low-powered eyepiece, hop northeast less than 1° to M64. Once found, increase magnification to study the galaxy’s structure more closely.
Black Eye Galaxy/M64
✅ Wait for It to Climb High Observe M64 when it’s near or past culmination—highest in the sky—to reduce atmospheric distortion. In spring months, this means aiming for mid-to-late evening sessions when it’s positioned near the meridian.
✅ Choose a Steady Night Atmospheric turbulence can blur fine detail. For the best chance of spotting the dark lane, observe on nights with good seeing conditions, when stars appear steady rather than twinkling.
✅ Shield Your Eyes from Light Avoid stray light from nearby devices or flashlights. Even a dim red light can reduce your sensitivity to faint contrast. Let your eyes adapt fully to darkness to detect subtle features.
✅ Use Averted Vision for the Dust Lane Looking slightly off-center can make the dark patch more obvious. Averted vision activates the more sensitive parts of your eye, enhancing the contrast between the dust lane and the galaxy’s glow.
✅ Use Moderate to High Magnification Start with around 100x to 150x to reveal M64’s bright core, then increase magnification to 200x or more to tease out the signature dark lane. Higher power enhances contrast and helps separate the dark dust band from the luminous core.
✅ Pair It with Nearby Galaxies After viewing M64, explore neighboring galaxies like M53 or the Virgo Cluster. Doing a mini galaxy tour keeps your night varied and helps you learn how different galactic structures appear by comparison.
Black Eye Galaxy/M64
❌ Naked Eye
With the naked eye, Messier 64 is completely invisible. At magnitude 8.5, it lies far below the threshold of unaided visibility, even under the darkest skies. Its location in Coma Berenices also places it away from the more prominent constellation landmarks, making it inaccessible without optical aid.
⚠️ Binoculars
In binoculars, M64 may appear as an extremely faint, unresolved smudge under dark skies, and only to experienced observers. Most casual stargazers will not detect it through handheld optics, as its small size and low surface brightness blend too easily into the background sky.
✅ Small Telescope
A small telescope, around 3 to 4 inches in aperture, reveals M64 as a soft, oval glow with a brighter core. The galaxy presents a condensed, almond-shaped profile, but the famous dark dust lane is usually not visible at this level. Still, the concentrated brightness at the center helps it stand out clearly from the surrounding star field.
✅ Medium Telescope
Through a medium telescope in the 6 to 8 inch range, Messier 64 becomes more rewarding. The core appears sharp and luminous, while the surrounding halo extends gently outward. Under steady seeing and with dark skies, the dark dust lane—the galaxy’s “black eye”—may begin to show as a subtle arc along one edge of the core, especially with averted vision.
✅ Large Telescope
A large telescope, 10 inches or more, reveals M64 in striking detail. The dark dust lane becomes more pronounced, visibly cutting into the bright core and giving the galaxy its trademark appearance. The surrounding halo shows faint texture, and experienced observers may detect hints of the spiral structure. Under ideal conditions, the view becomes rich and dramatic—one of the more visually distinctive galaxies in the Messier catalog.
Black Eye Galaxy/M64
Messier 64 is best enjoyed under dark skies where its structure and dark lane stand out. It remains visible in suburban conditions but loses much of its character in light-polluted areas.
🟣 In Bortle 1–2 skies, Messier 64 appears crisp and well-defined. The bright core stands out clearly, and the dark dust lane is visible as a distinct arc, especially with moderate magnification and averted vision. The galaxy floats in a rich star field, and its oval shape is cleanly outlined.
🔵 In Bortle 3–4 skies, M64 remains a satisfying target. The core is still bright, and the surrounding halo is easy to see. The dust lane may be subtle but detectable with careful observing. Background stars are slightly reduced, but contrast is still good enough to highlight the galaxy’s signature features.
🟢 In Bortle 5–6 skies, M64 begins to lose some contrast. The core is visible, but the halo fades into the background, and the dust lane becomes difficult or impossible to distinguish. The overall view is softer, with fewer surrounding stars to anchor the field.
🟠 In Bortle 7+ skies, M64 becomes a faint, unimpressive smudge. Light pollution drowns out its outer halo, and the dust lane is lost entirely. Only the core may be visible, appearing small and muted, especially without filtration or large aperture.
Black Eye Galaxy/M64
DSOs within 48° or 2 outstretched hands at arm's length