Important notice about STEREO Behind
What are those other images on the STEREO Daily Images page?
The STEREO Daily Images page shows
the STEREO images taken from the two STEREO spacecraft in the left and right columns. These give us
unprecedented views of the Sun from the side. In the central column we show images from similar
imagers taken along the Sun-Earth line. To accompany the EUVI images we show images from the AIA
instrument on the SDO spacecraft, for Cor1 we use the MLSO/Mk IV coronagraph in Hawaii, and for Cor2
it is SOHO's LASCO/C2 coronagraph. These instruments provide a third point of view to
compliment STEREO's two new views of the Sun.
A note about the EUV images (EUVI and AIA).
For dates on or after April
16, 2010 we are now comparing our EUVI images with higher resolution images from
SDO/AIA (launched Feb. 2010) rather than with images from SOHO/EIT. The AIA images to
which we compare our 171, 195, and 304 A EUVI data are taken in very nearly the same
wavebands so, although the AIA images are shown in different colors than the
EUVI and EIT data, they basically show the same thing. These images all depict extreme
ultra-violet (EUV) light, which is not visible to humans. Thus they are false
color and the exact colors are somewhat arbitrary.
AIA does not have a 284 A band, so we compare the EUVI 284 A data,
which shows material at about 2.2 million degrees K, with AIA 211 A band
data, which displays material at about 2 million degrees K.
Last Revised: Friday, 03-Nov-2017 14:43:59 EDT
Responsible NASA Official:
Webmaster: Kevin Addison