"A planetary nebula was a type of emission nebula, created by expelled matter of a star reaching the end of its life. M2-9 was such a nebula. The crew of Enterprise NX-01 surveyed a planetary nebula in 2151, at which time they detected a Vulcan survey ship apparently shadowing their activities. This happened three weeks before Enterprise encountered the Suurok-class Ti'Mur. (ENT: \"Breaking the Ice\") In the writers' second draft script of \"Breaking the Ice\", this nebula was referred to as simply a nebula whose type was unspecified, though it was also mentioned as being \"off the Merrium System.\""@en . "A planetary nebula was a type of emission nebula, created by expelled matter of a star reaching the end of its life. M2-9 was such a nebula. The crew of Enterprise NX-01 surveyed a planetary nebula in 2151, at which time they detected a Vulcan survey ship apparently shadowing their activities. This happened three weeks before Enterprise encountered the Suurok-class Ti'Mur. (ENT: \"Breaking the Ice\") In the writers' second draft script of \"Breaking the Ice\", this nebula was referred to as simply a nebula whose type was unspecified, though it was also mentioned as being \"off the Merrium System.\""@en . . . . . . . . . "Planetary nebula"@en . .