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Possible Answers:
CORONA.
Last seen on: NY Times Crossword 27 Nov 20, Friday
Random information on the term “CORONA”:
A corona (Latin for ‘crown’, in turn derived from Ancient Greek κορώνη, korṓnē, ‘garland, wreath’) is an aura of plasma that surrounds the Sun and other stars. The Sun’s corona extends millions of kilometres into outer space and is most easily seen during a total solar eclipse, but it is also observable with a coronagraph. Spectroscopy measurements indicate strong ionization in the corona and a plasma temperature in excess of 1000000 kelvin, much hotter than the surface of the Sun.
Light from the corona comes from three main sources, from the same volume of space:
In 1724, French-Italian astronomer Giacomo F. Maraldi recognized that the aura visible during a solar eclipse belongs to the Sun, not to the Moon. In 1809, Spanish astronomer José Joaquín de Ferrer coined the term ‘corona’. Based in his own observations of the 1806 solar eclipse at Kinderhook (New York), de Ferrer also proposed that the corona was part of the Sun and not of the Moon. English astronomer Norman Lockyer identified the first element unknown on Earth in the Sun’s chromosphere, which was called helium. French astronomer Jules Jenssen noted, after comparing his readings between the 1871 and 1878 eclipses, that that the size and shape of the corona changes with the sunspot cycle. In 1930, Bernard Lyot invented the coronograph, which allows viewing the corona without a total eclipse. In 1952, American astronomer Eugene Parker proposed that the solar corona might be heated by myriad tiny ‘nanoflares’, miniature brightenings resembling solar flares that would occur all over the surface of the Sun.