Video: new bird's eye view of Apple Campus 2 Spaceship, March 2016

Back in January, a drone video showed massive glass panels being installed, the largest on earth. In October, the entire ring was just beginning to take shape.

Today, most of the glass has been installed and the entire Spaceship ring structure has topped out, and the roof top's HVAC (Heating, Ventilation, and Air Conditioning) equipment is being covered with plates (appearing blue in the video) that will hold vast solar photovoltaic panel structures that will likely make the project the largest corporate solar structure in the U.S.

The distinctive Campus 2 project is so large it can be easily spotted from aircraft, as shown in our March update video (above). Also clearly visible is the project's grand cafeteria area with a dramatically high ceiling, the first segment of the structure to begin rising back in March of 2015, just one year ago.

Also depicted are the white fin-like sun shields that will ring the building at each floor level. The structures also function as part of the building's fresh air ventilation system, which will enable it to run without heating or air conditioning throughout most of the year, taking advantage of the very comfortably mild weather that blesses Cupertino, California.

Granted final approval just two years and four months ago, Apple's Campus 2 project is rapidly moving toward its initial occupancy goal beginning in January 2017, slightly later than originally expected.

Cook also noted to shareholders on Friday that project's 1000 seat theater might open in time to host next year's Annual Meeting, if everything goes according to plans.

Apple's cofounder Steve Jobs unveiled the huge project in 2011, noting that the central 2.8-million-square-foot "Spaceship" structure would house at least 12,000 employees, surrounded by bucolic landscaping including orchards of fruit trees and other greenery, featuring open space and walking paths to reclaim most of the 150-acre plot previously covered by asphalt parking lots.

Next to the center of Campus 2, Apple's parallel Phase 2 project is also well underway, adding additional office space, workshops, research and development labs and incorporating a small data center powered by renewable energy.

See previous coverage on AppleInsider of Apple Campus 2 and the current Infinite Loop headquarters, or our other articles on drones. Viewers interested in the DJI Phantom 2 Vision+ drone can read more about the device here.