A giant prominence arches above the chromosphere on the edge of the Sun in this hydrogen-alpha image.
The visible surface of the Sun that emits light is called the photosphere. In hydrogen-alpha light however, we are looking at the chromosphere, a region above the photosphere.
Exposure Data
- Lens: 130EDT f/8 triplet apochromatic refractor
- Focal Length: 2,080 mm
- F/stop: approximately f/30
- Exposure: 1/30th second
- ISO: 100
- Camera: Modified Canon 1000D (Digital Rebel XS) DSLR
- Mode: AVI captured from Live View at 5x with EOS Camera Movie Record, Best 20 percent of 3,524 frames
- White Balance: None
- In-Camera Noise Reduction: Off
- Filter: Solar Spectrum 0.2 angstrom narrowband hydrogen-alpha
- Mount: Takahashi EM200
- Date: July 12, 2012
- Start Time: 1:32 p.m. EDT
- Location: Voorhees, NJ
- Calibration: None
- Processing: Align and Stack in AutoStakkert!2, process in Photoshop CS5
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