[[Image:|260px]] Cluster View SystemsN/A RelaysN/A Location: Milky Way / Rosetta Nebula Prerequisite: Acquisition of Jacob: The Gift of Greatness(Mass Effect 2) The Rosetta Nebula, also known as Caldwell 49 or the Rosette Nebula, is an open cluster in the Monoceros constellation, approximately 5200 light years from Earth.