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Line 88: ===1991–present day=== [[Image:Tracemosaic.jpg\|thumb\|Full-disk mosaic of the million-degree ~~[[Sun]]~~corona by [[TRACE]]]] In August 1991, the solar observatory spacecraft [[Yohkoh]] launched from the [[Kagoshima Space Centre\|Kagoshima Space Center]]. During its 10 years of operation, it revolutionized X-ray observations. Yohkoh carried four instruments; of particular interest is the SXT instrument, which observed X-ray-emitting coronal loops. This instrument observed X-rays in the 0.25–4.0 [[SI units\|keV]] range, resolving solar features to 2.5 arc seconds with a temporal resolution of 0.5–2 seconds. SXT was sensitive to plasma in the 2–4 MK temperature range, making its data ideal for comparison with data later collected by TRACE of coronal loops radiating in the extra ultraviolet (EUV) wavelengths.<ref>{{cite journal

Coronal loop: Difference between revisions