Lately, these nebulae have gained significant popularity.
Seeking a distinctive perspective, I opted to capture them in a wide field using a 135mm lens, emphasizing depth to unveil intricate structures that may go unnoticed in narrower or less deep fields.
It's a result of an integration of more than 48 hours at f2.
1. Flying Bat Nebula (SH2-129)
The Flying Bat Nebula, cataloged as SH2-129, resides in the constellation Cepheus. This ethereal emission nebula is characterized by its reddish hue, which results from ionized hydrogen gas. Here are some fascinating details:
- Star Formation: SH2-129 is a region of active star formation. Within its nebulous embrace, massive stars are born from collapsing gas and dust. These stellar nurseries give rise to the luminous objects that pepper our galaxy.
- Bat-Like Appearance: The nebula’s intricate structure resembles a bat with outstretched wings, hence the poetic name. Imagine a cosmic bat soaring through the interstellar expanse, its wings aglow with the light of newborn stars.
- Distance Uncertainty: Determining the precise distance to SH2-129 has proven challenging. Astronomers continue to refine their measurements, but for now, its true location remains a tantalizing mystery.
2. Giant Squid Nebula (Ou4)
The Giant Squid Nebula, also known as Ou4, emerged onto the astronomical scene relatively recently. Discovered in 2011 by amateur astrophotographer Nicolas Outters of France, this nebula hides within the boundaries of SH2-129. Let’s unravel its secrets:
- Blue-Green Glow: Ou4’s striking blue-green emission primarily arises from doubly ionized oxygen atoms (OIII spectrum). Its otherworldly glow captivates stargazers and astronomers alike.
- Planetary Nebula or Not?: Initially, there was speculation that Ou4 might be a planetary nebula associated with a dying star. However, subsequent observations have challenged this hypothesis.
- Bipolar Outflow: Ou4 is now believed to be a bipolar outflow—a cosmic jet of material—moving at the same rate as SH2-129. Its source lies at the center of the nebula, where a triple star system (HR8119) resides.
- Hidden Dimensions: If fully visible, the Giant Squid Nebula would span nearly 50 light-years across. Imagine a colossal cephalopod swimming through the cosmic sea, its tentacles trailing behind it.
(last image sh2-129 20231108-wmtm7v9v7)
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