AAPOD2 Image Archives

2025 Charles Lillo 2025 Charles Lillo

The Andromeda Galaxy (M31)

The Andromeda Galaxy (M31) dominates this two panel mosaic with its vast spiral disk seen at a slight inclination, revealing intricate dust lanes, star clouds, and glowing star forming regions traced by faint red emission. The bright central bulge marks the galaxy’s dense core, while its extended arms span well beyond what is typically visible in shorter integrations, highlighting the true scale of our nearest large galactic neighbor at roughly 2.5 million light years away.

Surrounding M31 are numerous foreground Milky Way stars and its prominent satellite galaxies, including M32 and M110, which appear as compact elliptical companions embedded in the same field of view. Captured from Vancouver, British Columbia, Canada, this deep RGB mosaic totaling more than 24 hours of exposure emphasizes both the subtle color gradients across Andromeda’s disk and the delicate structures formed by gas, dust, and billions of stars interacting over cosmic time.

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2025, March 2025 Charles Lillo 2025, March 2025 Charles Lillo

IC 410: The Tadpole Nebula and Open Cluster NGC 1893

IC 410, known as the Tadpole Nebula, is a vibrant emission nebula located in the constellation Auriga, about 12,000 light-years away. At its core lies NGC 1893, an open cluster of young, massive stars whose intense radiation ionizes the surrounding hydrogen gas, causing the nebula to glow in shades of red and gold. This cluster, formed around 4 million years ago, powers the nebula and sculpts its intricate features.

A distinctive feature of IC 410 is the presence of two elongated tadpole-shaped structures, composed of dense gas and dust. These “tadpoles” are approximately 10 light-years long and point toward the cluster’s center. These regions are believed to be sites of ongoing star formation, where gravitational collapse may give rise to new stars. A lesser-known detail is that the tadpoles’ tails, shaped by the stellar winds of NGC 1893, align perfectly with the radiation pressure exerted by the cluster’s hot stars, offering a unique glimpse into the interplay between stellar winds and nebular material.

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