Coronal Streamers and Comet

Coronal Streamers and Comet

. A coronagraph on the Solar and Heliospheric Observatory (SOHO) shows bright helmet streamers near the Sunís equatorial regions (center right and center left) near the minimum in the Sunís magnetic activity cycle. The edge of the visible solar disk, or photosphere, is indicated by the white circle, and the larger circle marks the outer edge of the occulting disk of the coronagraph. A comet is also shown (bottom left) during its fiery plunge into the Sun; more than 400 Sun-grazing comets have been discovered with this instrument. (Courtesy of the SOHO LASCO consortium. SOHO is a project of international collaboration between ESA and NASA.)

Copyright 2010, Professor Kenneth R. Lang, Tufts University