Coronium
（重定向自Newtonium）
Coronium, also called newtonium, was the name of a suggested chemical element, hypothesised in the 19th century. It was named after the solar corona. This new atomic thin green line in the solar corona was then considered to be provenient from a new element unlike anything else seen under laboratory conditions. Because of this it was also mis-classified as Iron Line Number 1474.