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Sh2-155, commonly known as the Cave Nebula, is an emission nebula located approximately 2,400 light-years away in the constellation Cepheus. This celestial object derives its name from the dark, cave-like structure embedded within the glowing gas and dust. The Cave Nebula is a stellar nursery, where young stars are actively forming, illuminating the surrounding clouds of hydrogen gas.
Spanning about 35 light-years across, this nebula is a mixture of bright emission regions, dark absorption areas, and reflection nebulae. The bright portions of the nebula are powered by the radiation of young, hot stars within and near the cloud, which ionize the gas, causing it to glow. Meanwhile, the dark regions represent cooler areas where dust obscures the light from the stars behind them.
The Cave Nebula is part of a much larger star-forming complex that includes several other interesting objects, such as Bok globules, which are dense clouds of gas and dust that may eventually collapse to form new stars.
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The Lion Nebula, also known as Sh2-132, is a majestic emission nebula located approximately 10,000 light-years away in the constellation Cepheus. This nebula is an active star-forming region, where numerous young, massive stars are born. It is named for its resemblance to a lion in silhouette, proudly outlined against the luminous backdrop of the Milky Way.
The Lion Nebula spans an impressive 250 by 150 light-years, making it one of the larger star-forming regions in our galaxy. Its vivid colors and intricate patterns are the result of ionized hydrogen and oxygen gases, excited by the intense ultraviolet radiation emitted by the massive stars within the nebula. These interactions produce the Lion Nebula's distinctive glow, revealing the complexity and grandeur of the processes that fuel star formation in the universe.
Image Details
📷 Exposures (Ha, OIII, SII)
Hα, bin 1, 305 x 300s
OIII, bin 1, 265 x 300s
SII, bin 1, 275 x 300s
🔭 Equipment
Mount: RainbowAstro RST-135E / Avalon M-Zero
Telescope: Refractors Borg 107FL / TS86
Camera: QSI 6120
💻 Software:
(Windows 10) Sequence Generator Pro, PHD2, SkySafari, ASCOM drivers
(Mac OSX) PixInsight
📍Location
Bright suburban light pollution, Class 6 of darkness in Bortle scale.
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The Tulip Nebula, also known as Sh2-101, is a visually striking emission nebula located about 6,000 light-years away in the constellation Cygnus. This nebula is an active star-forming region, housing many young and energetic stars. It is named for its flower-like appearance, which resembles a blooming tulip seen in silhouette against the bright backdrop of space.
The Tulip Nebula spans roughly 70 by 55 light-years in size. Its vibrant colors and shapes are primarily due to the ionization of hydrogen gas by the intense ultraviolet radiation from the young stars within and around the nebula. These energetic processes give the Tulip Nebula its luminous glow and complex structure, highlighting the dynamic and ongoing nature of star birth in our galaxy.
Image Details
📷 Exposures (Ha, OIII, SII)
Hα, bin 1, 175 x 300s
OIII, bin 1, 175 x 300s
SII, bin 1, 175 x 300s
🔭 Equipment
Mount: RainbowAstro RST-135E
Telescope: Refractors Borg 107FL
Camera: QSI 6120
💻 Software:
(Windows 10) Sequence Generator Pro, PHD2, SkySafari, ASCOM drivers
(Mac OSX) PixInsight
📍Location
Bright suburban light pollution, Class 6 of darkness in Bortle scale.
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