A starfield has a red nebula covering much of the frame but in the center, extending nearly vertically, is a blue nebula that appears shaped, to some, like a squid. Please see the explanation for more detailed information.
星场中有一个红色星云覆盖了大部分画面，但在中心，几乎垂直向外延伸的是一个蓝色星云，有些人觉得它的形状像乌贼。有关更多详细信息，请参阅说明。
2020年10月7日 Ou4: A Giant Squid in a Flying Bat Image Credit & Copyright: Yannick Akar Explanation: A very faint but very large squid-like nebula is visible in planet Earth’s sky — but inside a still larger bat. The Giant Squid Nebula cataloged as Ou4, and Sh2-129 also known as the Flying Bat Nebula, are both caught in this cosmic scene toward the royal royal constellation Cepheus. Composed with 55 hours of narrowband image data, the telescopic field of view is 3 degrees or 6 Full Moons across. Discovered in 2011 by French astro-imager Nicolas Outters, the Squid Nebula’s alluring bipolar shape is distinguished here by the telltale blue-green emission from doubly ionized oxygen atoms. Though apparently completely surrounded by the reddish hydrogen emission region Sh2-129,…
