Science mission
A science mission, scientific mission, science survey, or science expedition was a type of mission whose purpose was scientific discovery.
In 2269, the USS Enterprise undertook a science mission to determine if the center of the Milky Way Galaxy was still creating new matter. (TAS: "The Magicks of Megas-Tu")
In the 23rd century, a Vulcan science mission traveled to the Hanoli rift, where they detonated a pulse wave torpedo at the coordinates of the tear, causing the Hanoli system and the Vulcans to be destroyed five minutes later. (DS9: "If Wishes Were Horses")