What is the name of the largest known crater on Uranus's moon Titania, named after the mother of Hamlet in Shakespeare's work?
Gertrude (crater) Gertrude is the largest known crater on Uranus's moon Titania. It is about 326 km across, 1/5 of Titania's diameter. It is named after the mother of Hamlet in William Shakespeare's play Hamlet. Features on Titania are named after female Shakespearean characters.
Palimpsest (planetary astronomy) A palimpsest, in planetary astronomy, is an ancient crater on an icy moon of the outer Solar System whose relief has disappeared due to creep of the icy surface ("viscous relaxation") or subsequent cryovolcanic outpourings, leaving a circular albedo feature, perhaps with a "ghost" of a rim. Icy surfaces of natural satellites like Callisto and Ganymede preserve hints of their history in these rings. A typical example is Memphis Facula on Ganymede, a 340 km wide palimpsest.