The International Astronomical Union (IAU) recently approved a proposal to assign names to nine impact craters on the planet Mercury.
What does this have to do with Tolkien fandom? Well, in keeping with the established naming theme for craters on Mercury, they are all named after famous deceased artists, musicians, or authors or other contributors to the humanities. One of the craters has been named in honour of JRR Tolkien.
The IAU has been the arbiter of planetary and satellite nomenclature since its inception in 1919.