thumbnail moon n.— «The moon, which is about 15 per cent illuminated, or more commonly called a “thumbnail moon,” is said to be a setting moon and will move rapidly through the night sky early on making its decent...
pluton n.— «If the ideas are approved at the general meeting of the IAU in Prague next week, schoolchildren will, in future, have to learn that the solar system has 12 planets: eight classical ones that dominate the system—Mercury, Venus...