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  what are coronal loops?
  zooming in on loops with TRACE
  why do we see loops?
  what have we learnt from TRACE?

why do we see loops?


We see loops because hot plasma is trapped by the magnetic field. This plasma is heated to temperatures of 1,000,000 °C or more. At these high temperatures the loops shine brightly, giving out lots of ultraviolet radiation and TRACE is designed to be sensitive to this radiation.

You can see more movies in our Gallery [Movie file 1mb or more - High quality]

Here is a TRACE movie showing a spectacular arcade of loops during a solar flare.

Sometimes only one or two loops appear together. However, this false-colour image mouse over arrow shows a multi-loop group in an active region at the limb. The blue shows plasma at 1,300,000 °C, green shows plasma at 1,600,000 °C and red shows plasma at 2,000,000 °C.




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