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Image Data
Designation |
Group of Bok Globules in IC 2948 |
Constellation |
Centaurus (Cen) |
Description |
Dark clouds, like these Bok
Globules, were once thought to be holes in the sky. In fact, the
extinction caused by their dust particles blocks the light from the
emission nebula behind. Bok Globules are considered to be too small to
collapse into stars and are likely to be destroyed by the radiation of
nearby stars. A good example of this destruction are cometary globules,
such as CG4, where the dust liberated by
energetic starlight feebly reflects some of it showing a long, comet-like
tail. |
Exposure |
Ha 12 x 15 min @ -15°C, 1x1 |
Camera |
SBIG ST-10XE selfguided,
CFW-8, Custom Scientific 4.5 nm Ha Filter |
Optics |
Astro-Physics AP155EDFS @ f/7.2
(prime focus) |
Mount |
Astro-Physics AP1200GTO |
Software |
MaxIm DL/CCD, Sigma Reject,
Adobe Photoshop 6.0 |
Location - Date - Time |
San Esteban (Chile) - 02Apr2003 -
00:30 UTC |
Conditions |
Transparency 6, Seeing 5, Temperature
+14°C |
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