AAPOD2 Image Archives

2025 Charles Lillo 2025 Charles Lillo

The Eastern Veil Nebula in Cygnus

The bright, filamentary arcs of NGC 6995 form part of the Eastern Veil Nebula, the remnants of a massive star that exploded around 8,000 years ago. The delicate structures of glowing hydrogen and oxygen gas trace shock waves plowing through interstellar space. Captured in rich detail, the red hues highlight ionized hydrogen while the blue tones represent doubly ionized oxygen, creating a vivid portrait of stellar death and rebirth.

This intricate region lies in the constellation Cygnus, along the plane of our Milky Way. Though the star that created this structure is long gone, its expanding debris continues to sculpt the surrounding medium, seeding future generations of stars. The entire Veil Nebula complex spans over 100 light-years and remains one of the most striking examples of a supernova remnant in the night sky.

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2025 Charles Lillo 2025 Charles Lillo

SH2-91: A Supernova Remnant in Cygnus

The faint, filamentary arcs of SH2-91 trace the expanding remains of a massive star that exploded thousands of years ago in the constellation Cygnus. This supernova remnant is part of a larger, diffuse structure of glowing gas that stretches across the star-rich fields of the Milky Way. Delicate tendrils of hydrogen and oxygen emission form the faint ribbons that mark the shock fronts moving through interstellar space.

Although far less well-known than the nearby Veil Nebula, SH2-91 offers a glimpse of the same cosmic process: the recycling of stellar material into the galaxy. The remnants of the long-gone star continue to shape the interstellar medium, seeding it with heavier elements that will one day become part of new stars and planets.

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2025 Charles Lillo 2025 Charles Lillo

Eyes Wide Shut - The Markarian Bridge Up Close

The Virgo Cluster is home to a remarkable structure of gas and dust: a collision-induced hydrogen bridge connecting the galaxies known as The Eyes (NGC 4435 & NGC 4438) to the giant elliptical galaxy M86. Captured here with more than 400 hours of exposure over two years, including 280 hours through a hydrogen-alpha filter, the image reveals an extraordinary level of faint detail in the vast intergalactic structures.

This delicate bridge is the result of gravitational interactions and past collisions, pulling material out into space and igniting regions of glowing hydrogen. The faint filaments weave across the field in a chaotic tapestry, bearing witness to the ongoing evolution of galaxies within the crowded Virgo Cluster.

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2025 Charles Lillo 2025 Charles Lillo

WR 134 – Rise of the Shai-Hulud

The massive Wolf–Rayet star WR 134, located in Cygnus about 6,000 light-years away, is the source of the striking nebula seen here. Intense stellar winds from the hot, unstable star sweep surrounding gas into a luminous bubble, glowing brightly in ionized oxygen (blue) and hydrogen (red). These winds move at thousands of kilometers per second, carrying away much of the star’s mass as it approaches the end of its short life. WR 134 is expected to eventually collapse in a violent supernova, seeding the interstellar medium with heavy elements.

The complex interplay of gas and dust gives the region its sculpted, almost otherworldly appearance. In this image, the bubble seems to rise from the surrounding filaments like a great cosmic sandworm, earning the nickname “Rise of the Shai-Hulud” after the desert creatures of Dune. Deep narrowband imaging reveals the faint arcs and ripples of past ejections, providing insight into the turbulent history of one of the galaxy’s most energetic stellar phases.

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2025 Charles Lillo 2025 Charles Lillo

SNR G007.5-01.7 “Taz” Near the Lagoon Nebula

Adjacent to the Lagoon Nebula (M8) lies the faint supernova remnant SNR G007.5-01.7, informally known as “Taz” for its distinctive shape. This remnant consists of delicate O III–rich filaments, the cooling and recombining gas from a massive star’s explosion thousands of years ago. The shock fronts, driven outward into the interstellar medium, excite oxygen atoms, producing the characteristic teal emission captured through narrowband filters. Its low surface brightness and location within a crowded Milky Way field make it a challenging target for deep imaging.

The object’s proximity to the bright emission of M8 often obscures its presence, requiring careful exposure balancing and extended integration time to separate its subtle filaments from background nebulosity. Observations like this provide rare opportunities to study the dynamics of supernova remnants interacting with surrounding molecular clouds in a dense galactic region. Such remnants contribute to the chemical enrichment of the interstellar medium, dispersing heavy elements forged in the progenitor star’s core.

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2025 Charles Lillo 2025 Charles Lillo

Star Trails Over Hunder Trail, Nubra Valley

In this long-exposure composite from Hunder Trail in the Nubra Valley, hundreds of sequential images capture the apparent motion of stars as Earth rotates. The camera was aimed toward the celestial pole, creating concentric arcs in the sky. The foreground’s still dunes and rugged terrain contrast sharply with the dynamic patterns above, emphasizing the scale and motion of our planet within the cosmos.

The varying colors of the trails arise from differences in stellar temperatures — blue from hotter, more massive stars and orange-red from cooler stars. By stacking shorter exposures rather than taking one extremely long shot, the photographer preserved detail, reduced noise, and revealed a clean, continuous record of the night’s rotation. This method turns hours of movement into a single frame of celestial geometry.

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2025 Charles Lillo 2025 Charles Lillo

NGC 7331

Nestled within the inclined spiral galaxy NGC 7331—often dubbed our Galaxy’s twin—lies a remarkable transient: SN 2025rbs, a Type Ia supernova first detected on 14 July 2025. Classified soon thereafter, SN 2025rbs emerged from the thermonuclear detonation of a white dwarf in a binary system, the classic mechanism behind Type Ia supernovae. Its proximity to Earth, at about 43–45 million light-years, makes it the brightest Type Ia supernova visible from Earth since SN 2014J, presenting an exceptional opportunity for detailed follow-up studies.

In this image, captured on August 8, 2025, the supernova is marked close to the galaxy’s bright core, highlighted in magnified insets for clarity. Its observed apparent magnitude is near 12, consistent with expectations for a Type Ia event at this distance. Such explosions serve as "standard candles" because their peak luminosities are consistent enough (with minor corrections) to measure cosmic distances accurately.

This portrait not only captures the beauty of a galaxy akin to our own but also the moment a cosmic milestone was recorded—one that will contribute to refining our understanding of the universe’s expansion.

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2025 Charles Lillo 2025 Charles Lillo

Milky Way Arch Over Tso Kar, Ladakh – Bathed in Airglow

In the rarefied high-altitude air of Ladakh’s Tso Kar region, the winter Milky Way stretches in a dazzling arc across the night sky. Prominent dark dust lanes weave through the galactic bulge, while brilliant star clouds and nebulae mark the dense core. Below, a vivid green and yellow airglow blankets the horizon — a faint, continuous emission from atmospheric oxygen and other molecules energized by solar ultraviolet radiation earlier in the day.

Airglow, unlike aurorae, occurs globally and year-round, its subtle light ensuring that the night sky is never completely dark. This panorama captures both the grandeur of the galaxy and the restless chemistry of Earth’s upper atmosphere in a single frame, revealing a landscape where terrestrial and cosmic phenomena meet.

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2025 Charles Lillo 2025 Charles Lillo

The Veil Nebula - A Wider Context

In this expansive wide-field portrait, the Veil Nebula’s delicate filaments emerge from the remnants of a massive star that exploded thousands of years ago. Ionized hydrogen glows deep crimson, while oxygen-rich shock fronts appear in cyan, tracing the intricate structure of this ancient supernova remnant. Surrounding the nebula, a rich tapestry of interstellar gas and dust is illuminated, revealing the turbulent environment in the Cygnus constellation.

Captured from Zabriskie Point in Death Valley, the image places the Veil Nebula within its broader cosmic neighborhood, showing how its wispy arcs are embedded in vast clouds of hydrogen that span the region. The combination of high-resolution detail and wide framing offers a rare glimpse of both the remnant’s fine structure and its larger-scale relationship with the Milky Way’s glowing star-forming regions.

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2025 Charles Lillo 2025 Charles Lillo

Death Valley Nights: The Milky Way at Zabriskie Point

From the rugged badlands of Zabriskie Point in Death Valley National Park, the central bulge of our Milky Way rises in breathtaking detail. The dense star fields are threaded with dark molecular dust lanes, while pinkish-red hydrogen emission nebulae, including the Lagoon (M8) and Trifid (M20) Nebulae , glow from the ultraviolet light of massive young stars. Higher in the frame, faint extended nebulae appear as red arcs and patches, their delicate structures revealed through long exposure imaging.

Near the horizon, a greenish band of airglow shines from oxygen atoms high in Earth’s atmosphere, contrasting with the cool-toned, shadowed terrain below. Together, the stark geology of the badlands and the rich structure of our galaxy create an image that bridges Earth and cosmos, captured under some of the darkest skies in the continental United States.

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2025 Charles Lillo 2025 Charles Lillo

Pacman Nebula in LRGB and Narrowband

The Pacman Nebula (NGC 281) emerges from the star-filled Cassiopeia constellation, framed by delicate interstellar dust and glowing gas. Captured through a total of 46 hours of integration, 19 hours in narrowband and 27 hours in LRGB, the image reveals exquisite details in the nebula’s ionized hydrogen, oxygen, and sulfur regions, with intricate dark lanes cutting through the luminous clouds. These dense, dusty structures are active sites of star formation, sculpted by powerful stellar winds and radiation from hot, young stars. The rich colors come from a careful combination of narrowband emission data and natural-color broadband exposures, producing both scientific depth and aesthetic beauty.

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2025 Charles Lillo 2025 Charles Lillo

NGC 7094 and the Rarely Imaged “Shenron Nebula” [O III]

At the center of this richly detailed wide-field view lies NGC 7094, a faint planetary nebula in the constellation Pegasus, showcasing its delicate blue-green glow from doubly ionized oxygen ([O III]). Surrounding it is an intricate tapestry of dusty interstellar cirrus, laced with faint red hydrogen emission. Cutting dramatically across the frame, the shimmering cyan ribbon known as the “Shenron Nebula” [O III] Arc reveals a rarely imaged ionization front, its ethereal form resembling a mythical dragon winding through the cosmic clouds. This combination of a planetary nebula and expansive, unrelated foreground structures creates a striking juxtaposition of astrophysical phenomena within the same celestial canvas.

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2025 Charles Lillo 2025 Charles Lillo

NGC 5907 and the Ghostly Stellar Stream

In this deep-sky portrait, the spiral galaxy IC 4633 emerges from behind a veil of galactic cirrus — faint, dusty clouds within our own Milky Way. These tenuous structures scatter and reflect the combined starlight of the galaxy, giving the scene a soft, ethereal glow. While IC 4633 lies far beyond our own galactic boundaries, the wisps of interstellar dust in the foreground create the illusion of the galaxy peering through a cosmic curtain. The interplay between the sharp, structured spiral arms and the diffuse, flowing dust filaments makes this field a striking example of depth and perspective in astrophotography.

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2025 Charles Lillo 2025 Charles Lillo

Radiant Wings of the Swan Nebula

The Swan Nebula, also known as M17 or the Omega Nebula, is a massive star-forming region located about 5,000 light-years away in the constellation Sagittarius. This detailed image reveals its turbulent clouds of ionized hydrogen gas, sculpted into intricate filaments and arcs by the intense ultraviolet radiation and stellar winds from newborn massive stars. The bright blue areas trace regions rich in oxygen, while gold and orange hues highlight sulfur and hydrogen emissions, captured here in a narrowband palette that brings out the nebula’s complex structure.

This view showcases M17’s luminous core embedded in vast dark dust lanes that both obscure and shape the surrounding emission. The Swan Nebula spans about 15 light-years across and is one of the brightest and most massive H II regions in our galaxy, making it a favorite target for both professional and amateur astronomers. The interplay of light and shadow within the nebula offers a striking glimpse into the chaotic, beautiful environments where stars are born.

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2025 Charles Lillo 2025 Charles Lillo

The Gecko Nebula – LBN 437 from Spain

Winding across the stars in ghostly blues and reds, LBN 437 is a dark nebula in the constellation Lacerta that has become affectionately known as the Gecko Nebula due to its striking, reptilian shape. This beautifully composed image from Cinctorres, Valencian County, Spain, captures both the glowing hydrogen emission and delicate reflection nebulae as interstellar dust swirls around young, hot stars embedded in the cloud.

The Gecko’s “head,” illuminated by nearby stars, appears to glow with subtle blue hues while the reddish background is caused by hydrogen-alpha emission. These faint structures are part of the larger Cepheus Flare region, a vast complex of gas and dust in our Milky Way where new stars are forming. Images like this reveal the dynamic sculpting forces of stellar radiation, gravity, and time.

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2025 Charles Lillo 2025 Charles Lillo

Sharpless 155 – The Cave Nebula in 37 Hours of SHO Color

This brilliant and colorful image of Sharpless 155, also known as the Cave Nebula, reveals a complex region of star formation and glowing gas sculpted by powerful stellar winds and radiation. Captured in the SHO palette (Sulfur, Hydrogen, Oxygen), this narrowband composite highlights the intricate interplay of ionized gases across the emission nebula in vivid contrast: sulfur in red, hydrogen in green, and oxygen in blue.

Located in the constellation Cepheus, the Cave Nebula is a blend of emission, reflection, and dark nebulae. The bright wall of gas seen on the left appears to form a cavern-like hollow, giving this nebula its popular name. This image represents 37 hours of total exposure, allowing for fine detail in the faintest structures of this richly textured cosmic landscape.

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2025 Charles Lillo 2025 Charles Lillo

Fenrir the Dark Wolf – A Cosmic Silhouette in Cygnus

Amid the bright hydrogen glow of the Cygnus constellation, a menacing dark nebula takes the shape of a wolf mid-prowl. Known informally as Fenrir the Dark Wolf, this region of the sky is dominated by intricate filaments of ionized hydrogen (Ha) gas, illuminated in vivid red through over 11 hours of narrowband exposure. The dark “wolf” shape is formed by dense dust clouds that obscure the bright emission behind them, creating the illusion of a celestial predator on the hunt.

This HaLRGB composition was captured under Bortle 6 skies with a total integration time exceeding 21 hours, combining deep luminance and RGB channels to balance detail and color. The result is a rich tapestry of contrast and structure, with subtle background stars peppering the cosmic canvas. A haunting example of pareidolia in the interstellar medium, Fenrir waits in the shadows of Cygnus.

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2025 Charles Lillo 2025 Charles Lillo

VdB 142 – The Elephant’s Trunk Nebula in a Bortle 6 Urban Sky

Even from a Bortle 6 urban sky, the Elephant’s Trunk Nebula emerges in stunning detail and color after more than 30 hours of exposure. Cataloged as VdB 142, this dense column of gas and dust winds through the emission nebula IC 1396, located roughly 2,400 light-years away in the constellation Cepheus. The glowing rim traces ionized gases shaped by the powerful radiation and stellar winds of nearby massive stars.

At the top of the “trunk,” bright-rimmed globules and embedded protostars signal active star formation. This narrowband composition highlights sulfur (red), hydrogen (green), and oxygen (blue) emissions, revealing dynamic layers and structures often lost under light-polluted skies. The result is a dramatic, high-contrast portrait that demonstrates what dedication and careful processing can achieve, even in less-than-ideal observing conditions.

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2025 Charles Lillo 2025 Charles Lillo

NGC 6729 and the Corona Australis Dust Complex

In this deep and detailed portrait, the Corona Australis region glows with a mixture of dark molecular clouds, reflection nebulae, and faint emission features centered around NGC 6729. The reddish filaments near the center trace hydrogen-alpha emission, while the blue patches reflect starlight from young stars embedded in their birth clouds. The entire complex is a rich star-forming region located about 430 light-years away.

Sweeping arcs of dust stretch across the frame, hinting at the turbulent processes that shape interstellar matter. Toward the right, the globular cluster NGC 6723 glitters through the haze, a stark contrast to the soft glow of nebulosity. This image was captured from Itex Observatory in Texas using narrowband and broadband filters to reveal the full complexity of this iconic southern sky region.

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2025 Charles Lillo 2025 Charles Lillo

Iris in the Dust – LBN 1148 and NGC 7023

At left, the Iris Nebula (NGC 7023) glows with a striking blue hue, illuminated by a young star embedded in a dense reflection nebula. This brilliant bloom of starlight lies embedded within a vast expanse of interstellar dust belonging to the dark nebula complex LDN 1148. These cosmic clouds are part of the Cepheus Flare region, located around 1,300 light-years away in the constellation Cepheus.

Surrounding the Iris is a sweeping tapestry of obscuring dust that both scatters starlight and conceals distant background stars. On the right side of the frame, twisted tendrils of LDN 1148 weave into complex shapes, suggesting turbulence and motion sculpted by magnetic fields and stellar winds. This deep wide-field view reveals the delicate interplay between light and shadow across one of the sky’s most photogenic dark nebula regions.

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