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| Wide angle view of Trifid and Lagoon Nebulae, Sep 20, 2024. Photo credit: Purnendu Gupta |
The Lagoon nebula is a popular late-summer / early fall target for stargaers in the northern hemisphere. Perched above the tipped "teapot" of Sagittarius it disappears below the horizon quickly in the following months. By that measure, this Friday, September 20th, two days before the official start of fall, was past its prime viewing window. Yet, I chose to give it a shot.
The result was the image above. A two-for-one wide angle view of two nebulae, the Trifid on the left and the Lagoon on the right. Light that is more than four thousand years old, gathered over 52 minutes through a narrowband filter. The image is rich in red Hydrogen-alpha light which is the signature of emission nebulae. To me, the swirling clouds around a brighter core of the Lagoon looks like the whorls in rose petals. The nearby Trifid has menacing dark streaks across its face. Unfettered by such features, the Lagoon might appear to be a calmer place. Yet, nothing could be farther from the truth.
