Apple's largest project ever -- the massive spaceship-like Campus 2 -- is scheduled to finish construction later this year for an opening in 2017.

Last month, Mashableprovided an exclusive first look at the new headquarters. Now new drone footage has revealed even more details showing the campus' progress.

Uploaded to YouTube by Duncan Sinfiel, the 4K video shows the Campus 2's nearly completed outer ring of floors. We can also see solar panels installed on the roof.

As we reported, Apple has already installed over 900 curved glass panels using custom-made "manipulator" machines that lift and secure them into place.

Campus 2 is designed to house 13,000 employees and will include a smaller 120,000-square-foot glass-enclosed "Theatre" with seating for 1,000. The Theatre will be the stage for Apple's future product unveilings.

The new campus, which has an estimated cost of about $5 billion, is being designed by Norman Foster. Apple chief design officer Jony Ive has also been working closely with Foster to ensure the project's smooth construction.

Sinfiel's website has a timeline of videos showing the construction of Campus 2 throughout the last year.

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