Image Credit & Copyright: Adam Block, Mt. Lemmon SkyCenter, U. ArizonaExplanation:
Gorgeous spiral galaxy M33 seems to have more than its fair share of glowing hydrogen gas. A prominent member of the local group of galaxies, M33 is also known as the Triangulum Galaxy and lies about 3 million light-years distant. Its inner 30,000 light-years are shown in this telescopic galaxy portrait that enhances the reddish ionized hydrogen clouds or HII regions. Sprawling along loose spiral arms that wind toward the core, M33’s giant HII regions are some of the largest known stellar nurseries, sites of the formation of short-lived but very massive stars. Intense ultraviolet radiation from the luminous, massive stars ionizes the surrounding hydrogen gas and ultimately produces the characteristic red glow. To enhance this image, broadband data was used to produce a color view of the galaxy and combined with narrowband data recorded through a hydrogen-alpha filter, transmitting the light of the strongest hydrogen emission line. To see the monochromatic narrowband data alone of the hydrogen clouds of M33:
NASA APOD 26-dec-13
NGC 1893 is an open cluster in the constellation Auriga. The star cluster is imbedded in the emission nebula IC 410.
Imaging telescopes or lenses: Takahashi FSQ-106 EDXIII Astrograph @f/3,6
Imaging cameras: Starlight Xpress SXVR-H18 mono
Mounts: Takahashi Em200 Temma2M
Guiding telescopes or lenses: Takahashi FSQ-106 EDXIII Astrograph @f/3,6
Guiding cameras: Starlight Xpress Lodestar
Focal reducers: Takahashi Reducer QE 0.73X
Filters: Astrodon OIII 5nm, Astrodon SII 5nm, Astrodon Ha 5nm
26 December 2013
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