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Part of the telescope array in our observatory is a 60mm Lunt Solar telescope with a hydrogen-alpha filter. The solar telescope has the ability to view the Sun directly, and an Atik Infinity CCD camera captures the images.
The hydrogen-alpha filter is an integral part of the telescope, and filters out all light except for a very narrow slice of the visual spectrum centered on the frequency of light associated with electrons in atoms of hydrogen dropping from a high energy level back to their original orbits in the atom. The hydrogen-alpha wavelength is 656 nm.
When you look at an image of the sun through a hydrogen-alpha filter, solar prominences, flares, and convection cells become visible. The latest image on the Wall Township Public Schools Observatory page features a close-up of the solar disk and a moderate-sized solar flare visible at the lower-right corner of the image.
More solar images will be posted as they become available. We are also planning on a live video stream from the solar telescope, which should be available soon.