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Sh2-132, commonly known as the Lion Nebula, is a dramatic emission nebula located in the constellation Cepheus, roughly 10,000 light-years from Earth. This vast cloud of glowing hydrogen spans nearly 100 light-years and is energized by a small group of massive, extremely hot Wolf–Rayet and O-type stars at its core. Their intense ultraviolet radiation sculpts the surrounding gas into sweeping arcs, filamentary shells, and bright shock fronts that give the nebula its distinctive, lion-like appearance.
The nebula is an active stellar nursery, where powerful stellar winds compress pockets of gas and dust, triggering new generations of star formation while simultaneously eroding the surrounding material. Intricate layers of ionized hydrogen, sulfur, and oxygen create striking contrasts in narrowband imaging, revealing a complex interplay between creation and destruction.
Sh2-132 stands as a vivid example of how massive stars shape their environment—both forging and dispersing the raw material of future stars—making the Lion Nebula a compelling and dynamic target for astrophotographers and observers alike.
Technical Details
Telescope: Sky-Watcher Esprit 100ED Refractor
Auto Focus: ZWO Electronic Auto Focuser
Astronomy Camera: ZWO ASI533MC Pro
Filter: Optolong UV-IR cut filter; 420 exposures @ 60 seconds each (7 hours)
Filter: Antlia ALP-T Dual Narrowband Ha/Oiii Filter; 156 exposures @ 5 minutes each (13 hours)
Total Integration Time: 20 hours
Auto Guiding: William Optics Uniguide 50mm Guide Scope
Auto Guiding Camera: ZWO ASI120MM Mini Guide Camera
Auto Guiding Software: PHD2
Telescope Mount: Sky- Watcher EQ6-R Pro Equatorial Mount
Telescope Computer: BeeLink GK-55 Mini PC / Windows 10 Pro
Wireless Communication: GL-iNEt Beryl Travel Router
Telescope Control & Image Capture Software: Nighttime Imaging ‘N’ Astronomy (N.I.N.A.)
Image Integration Software: Astro Pixel Process, by Aries Productions
Image Post Processing Software: PixInsight, by Pleiades Astrophoto
Images captured: Palm Springs, CA during November 2024. Dark sky classification = Bright suburban sky (Bortle 6)