The MESSENGER spacecraft has been orbiting Mercury since 2011, and the mission is coming to an end this spring. The science team has asked the public for suggestions of names for five impact craters. They're already
accepting entries and will continue to accept them until January 15, 2015 (23:59 UTC). Fifteen names will then be submitted to the International Astronomical Union (IAU) to choose the five winners.
There are IAU rules for naming impact craters on Mercury. They're named in honor of people who've made outstanding contributions to arts and humanities, e.g., writers, dancers, architects, painters, etc. The person must
(1) have been recognized as a significant figure for more than 50 years,
(2) have been dead for at least three years,
(3) not have the same name as any other feature in the Solar System,
(4) not have a name with any political, religious or military significance.
You'd be expected to justify your choice.
They say, “We are particularly interested in submissions that honor people from nations and cultural groups that are under-represented amongst the currently-named craters.â€
Here is
the list of existing names for craters on Mercury.