View Full Version : Astrophotos: The Wispy Edge of the Sun

2014-May-20, 02:50 PM
It’s like a total solar eclipse — without the Moon! Using a special hydrogen-alpha filter that completely blocks the Sunís photosphere (visible surface) these images show just the Sun’s corona and the dancing solar prominences. The filter blocks all light from the Sun except for the red light emitted by excited hydrogen atoms, which are […]

More... (http://www.universetoday.com/112023/astrophotos-the-wispy-edge-of-the-sun/)