Image of the solar corona in white light (outer circle, blue and
white) and X-Rays (inner circle, red, yellow, and black) on
April 22, 1994, courtesy of the High Altitude Observatory and
the Yohkoh Science team. The dashed circle is the solar radius.
Click on image for full size Image courtesy of the High Altitude
Observatory, National Center for Atmospheric Research (NCAR),
Boulder, Colorado, USA. NCAR is sponsored by the National
Science Foundation.The solar X-ray image is from the Yohkoh
mission of ISAS, Japan. The Solar Atmosphere The visible solar
atmosphere consists of three regions: the the chromosphere, and
the solar corona. Most of the visible (white) light comes from
the photosphere, this is the part of the Sun we actually see.
The chromosphere and corona also emit white light, and can be
seen when the light from the photosphere is blocked out, as
occurs in a solar eclipse. The sun emits electromagnetic
radiation at many other wavelengths as well. Different types of
radiation (such as radio, ultravi