As a kid I remember reading about “Vulcan,” which people used to think existed between Mercury and the Sun but always orbited on the opposite side.
Completely fictional, of course.
Vulcan made a comeback as the fictional home of Spock in Star Trek. It was said by Star Trek creator Gene Roddenberry to be orbiting around 40 Eridani (also called HD 26965), a triple star system in the constellation of Eridanus “the river” in the southern hemisphere just 16 light years distant. In September 2018, astronomers at the University of Florida in Gainesville found a “super-Earth” exoplanet orbiting exactly where Vulcan was said to be.
I bought her Star Trek novelizations when I was a teenager. At the time, I had no idea that (a) she was an original Trekkie (b) had studied genetics and (c) had won both the Nebula and the Hugo Award (the Nebula multiple times).
She also made it a point to prove that women could write science fiction just as well as men, in a completely male-dominated science fiction landscape.
She managed to finish her final novel less than two weeks before she died.
(Read here if you don’t have access to or don’t care for the NYTimes: https://www.geekwire.com/2019/vonda-n-mcintyre-1948-2019-seattle-science-fiction-star-dies-cancer/)