Science: Other science with NuSTAR NuSTAR will provide unique
and valuable high energy observations of the Sun and Solar
corona. The corona is the very hot, low density outer atmosphere
of the Sun, reaching temperatures of more than one million
degrees and extending millions of kilometers into space. It is a
very active region, with the regular appearance of large-scale
loops, flares, prominences, and coronal mass ejections. Studying
the corona, we get a close-up look at the particle acceleration
processes similar to those that take place in supernova
remnants, black hole jets, and high temperature astrophysical
plasmas. NuSTAR will be orders of magnitude more sensitive to
Solar hard X-ray events than the Reuven Ramaty High Energy Solar
Spectroscopic Imager (RHESSI), a NASA Small Explorer mission
launched in February 2002 and the most sensitive high energy
Solar X-ray mission prior to NuSTAR. Solar flares that are just
barely detectable by RHESSI will nearly saturate NuSTAR. Thus,
NuSTAR will open up the stud