Nebulae
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How AI Enhanced My Imaging of the Jellyfish Nebula
Sh2-248 is the Jellyfish Nebula, a supernova remnant in Gemini. Visually it’s a lacy web of shock-heated filaments: strong Hα arcs and lots of O III structure that can give it that teal/blue “glow” in narrowband. It sits near the bright star η Geminorum (Propus), and spans roughly ~45–50 arcminutes (bigger than the full Moon).…
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Understanding the Unique Features of Sharpless 157
Sharpless 157 is a sprawling HII emission nebula sitting on the Cassiopeia/Cepheus border. It is approximately 8,000 to 11,000 light years away and spans about 1 arc degree of the sky. It consists of two different parts. The blue “claw” part on the Northern (left) side is a ring nebula surrounding Wolf Rayet Star WR…
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Astrophotography of NGC 1499: The California Nebula Unveiled
NGC 1499, commonly known as the California Nebula, is a large emission nebula in the constellation Perseus. Stretching roughly 2.5 degrees across the sky, its elongated shape resembles the outline of the U.S. state of California. The nebula lies about 1,000 light-years away and is composed primarily of glowing hydrogen gas energized by the nearby…
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IC 405 – A Chance Encounter with a Runaway Star
It probably seems by my posts that all nebulae are stellar nurseries. This week I captured one that is not a stellar nursery but a very unique nebula. Description IC 405 is visible only because of a chance meeting with a star, AE Aurigae. AE Aurigae is a large, hot O-type star 1,300 to 1,500…
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Exploring IC 410: The Tadpole Nebula and Stellar Formation
Emission nebulae populate the spiral arms of our galaxy. Scientifically, they offer us a window into stellar formation. Aesthetically, they make wonderful targets for the astrophotographer. IC 410 is an example of one of these beautiful nebulae. IC 410 is an expansive cloud of ionized hydrogen known as an HII region. The cloud glows due…
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How to Image Emission Nebulae Despite Full Moon Challenges
This week brought with it a problem for the astrophotographer, the nearly full moon. The full moon is much like light pollution in that its reflected light causes the sky to brighten and this creates a situation where the contrast for dim objects is lost. The astrophotographer would normally have two options, image the full…
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The Wolf-Rayet Star WR7: Heart of Thor’s Helmet Nebula
This week’s capture is that of NGC 2359, Thor’s Helmet. This is a beautiful nebula in Canis Major. It comprises a central illuminated bubble-like structure attached to two prominent “wings” giving rise to its name. There is however much more to this superhero’s headgear when we start to peel back its layers. At the heart…
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The Flame and Horsehead Nebulae: A Cosmic Duo
Today’s image is an iconic image captured in December of ’24 featuring the Flame and Horsehead Nebulae. While these two nebulae in themselves are absolutely beautiful, there is a lot more in this image to be explored, so let’s get into it. NGC 2024, commonly called “The Flame Nebula,” is an emission nebula. A dark…
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Understanding IC 405: Emission and Reflection Nebula Insights
This week’s image is that of IC 405, otherwise known as the Flaming Star Nebula. It resides approximately 1,500 light years away in the constellation of Auriga. The nebula consists of both an emission and reflection nebula. The bright star in the center is AE Auriga and is a hot blue star. The energy from…
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Understanding Reflection Nebulae: Messier 78 Explained
Messier 78 is a reflection nebula in the Orion constellation discovered by Pierre Mechain in 1780. It is about 1350 light years distant and approximately 5 light years in diameter. Unlike emission nebula which shine by the ionization from nearby hot highly energetic stars, reflection nebulae shine by reflecting or scattering light from cooler stars.…
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