Marella Explorer 2, formerly Celebrity Century and  SkySea Golden Era, was the lead ship of the Century class of cruise ships for Celebrity Cruises, and the co-flagship of the Celebrity fleet, along with Millennium-class ship , and the newest Solstice class, .
The Marella Explorer 2, previously known as Celebrity Century and SkySea Golden Era, is the flagship of the Century class of cruise ships for Celebrity Cruises, sharing the title of co-flagship with the Millennium-class ship and the newest Solstice-class vessel.