description IC 417 Overview
IC 417 is an emission nebula located in the northern constellation of Auriga. It is colloquially known as the Spider Nebula and is often observed alongside the neighboring Fly Nebula, NGC 1931. The nebula is part of a larger star-forming complex that includes the young open star cluster Stock 8. It is a frequent target for amateur astronomers due to its intricate structure of glowing gas.
help IC 417 FAQ
What kind of nebula is IC 417?
IC 417 is an emission nebula in the constellation Auriga, often called the Spider Nebula. It is part of a star-forming region, so its glowing gas is linked to young stellar objects rather than being a finished star cluster. [NASA overview](https://science.nasa.gov/photojournal/the-spider-nebula/)
What is the Fly Nebula near IC 417?
Observers often frame IC 417 with nearby NGC 1931, the object commonly called the Fly Nebula. The pair is known in astrophotography as the Spider and the Fly.
Why does IC 417 glow brightly in astrophotographs?
Its scientific classification is an H II region, meaning ionized hydrogen gas is a major part of the nebula's glow. That is why narrowband images can make its hydrogen emission stand out strongly.
How do astronomers find IC 417?
Start by locating Auriga and then use NGC 1931 as a nearby imaging partner. The target is better suited to a telescope or astrophotography setup than to unaided-eye viewing, and the Spider nickname helps distinguish it from other Auriga nebulae.
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