https://www.sciencedowneast.com/zenphoto Sat, 08 Aug 2026 05:27:20 -0300 Sat, 08 Aug 2026 05:27:20 -0300 http://blogs.law.harvard.edu/tech/rss Zenphoto RSS Generator https://www.sciencedowneast.com/zenphoto/index.php?album=Galaxies/NGC-4236&image=NGC+4236.jpg Click on the image to view it at full resolution, then click again for actual size.

NGC 4236 is a barred spiral galaxy in the constellation Draco and an outlying member of the M81 Group of galaxies, located roughly 12-15 million light-years away (estimates in the literature range from about 11.7 to 21 million light-years). Despite spanning nearly 100,000 light-years, a size comparable to the Milky Way, it is classified as a low surface brightness galaxy, with its stars and star-forming regions spread thinly across an elongated disk rather than concentrated in a bright nucleus. This gives it a large apparent size on the sky (over 20 arcminutes) but a deceptively faint, diffuse look visually. It is a challenging target for astrophotographers, requiring long integration to reveal the mottled star-forming clumps along its bar and the faint traces of its spiral disk.

[Source: Wikipedia, en.wikipedia.org/wiki/NGC_4236]

Moon Phase	New Moon
Camera	ToupTek ATR2600C
Optics	Skywatcher Esprit 120ED, 840 mm focal length, f/7 (120 mm aperture, APO triplet)
Date	2025-05-28
PixInsight Processing	Image Integration (x2) Drizzle Integration Background Neutralization Automatic Background Extraction Dynamic Background Extraction BlurXTerminator (AI deconvolution) (x2) NoiseXTerminator (AI denoise) Generalized Hyperbolic Stretch (x4) Curves Transformation (x2) HDR Multiscale Transform SCNR

Date: July 28, 2026 ]]> https://www.sciencedowneast.com/zenphoto/index.php?album=Galaxies/NGC-4236&image=NGC+4236.jpg Wed, 28 May 2025 00:00:00 -0300