USS. Tempest - a William Shakespear play
USS. Dawn Treader - based on the C.S. Lewis book
USS. Invictus - a poem by William Henley
USS. Tunguska - a huge explosion that happened on 30th June 1908
USS. Cassini - after the Cassini mission to Saturn
USS. Aventine - after Captain. Dax's ship in the Star Trek Destiny books 'Vesta Class'
USS. Goliath - a name I chose for my runabout
USS. Echelon - a signal intelligence codename to monitor cold war communications of the Soviet Union
USS Aotearoa, the native name of New Zealand.
USS Drakkar, named after the famous norse longships.
USS Terra, self speaking.
USS Rapier, one of the most elegant weapons ever made, imho.
USS Stardust, named after a primitive starship from another universe/ reality.
In order from first to current (I tend to pick more obscure names/references for that unique-ish feeling):
USS Parallax (LC) - Was thinking about parallax scrolling if I remember correctly, sounded good so I went with it.
USS Xanadu (SV) - Originally the summer capital of Kublai Khan's empire, but it's been referenced many a time.
USS Amarantine (RSV) - Enya album name, related to a genus of plant, sounded interesting.
USS Cassandra (LRSV) - Greek prophetess
USS Alessa (DSSV) - Character from the Silent Hill series of games (brilliant games if you like horror) - Alessa Gillespie
USS Asakura (ARSV refit) - Character from the anime 'Haruhi Suzumiya' - Ryoko Asakura
The penumbra (from the Latin paene "almost, nearly" and umbra "shadow") is the region in which only a portion of the light source is obscured by the occluding body. An observer in the penumbra experiences a partial eclipse. An alternative definition is that the penumbra is the region where some or all of the light source is obscured (i.e., the umbra is a subset of the penumbra).