Homonym: corona (Crown)
"Corona" can refer to several things, but it is most commonly associated with the COVID-19 pandemic caused by the SARS-CoV-2 virus. This virus emerged in late 2019 and led to widespread illness, prompting global health measures to control its spread. Symptoms can range from mild respiratory issues to severe illness, particularly in vulnerable populations.
In astronomy, "corona" describes the outer atmosphere of a star, including our Sun. This region is visible during a total solar eclipse as a halo of plasma surrounding the Sun. The corona is much hotter than the surface of the Sun, with temperatures reaching millions of degrees Celsius.