In a presentation to the city council in Cupertino, Calif., Apple chief executive Steve Jobs came down from the iCloud to outline the company’s plans for a 150-acre campus to house a massive building that should have enough space for up to 13,000 employees.

The main building will be a four-story circle — Jobs said there wouldn’t be a “straight piece of glass” in the whole structure.

“It’s a little like a spaceship landed there,” Jobs said of the design mock-up.

The somewhat bizarre campus would have mostly underground parking, as Apple plans to devote the above-ground campus to landscaping. Jobs said that a natural-gas generator would power the campus and that the company would use the city’s power grid only as a backup.

The company wants to start construction next year and plans to move in by 2015.

Jobs said that the company may also build an auditorium to host events on-site instead of renting space in San Francisco, as it does for the Worldwide Developers Conference.

Monday’s keynote announcement at WWDC marked Jobs’s second major appearance since he began his medical leave in January. Many are wondering what that means for his chances of coming back to Apple any time soon.

In speaking before the city council, Jobs has indicated that he’s still involved in major company decisions, a message that could have both positive and negative implications for Apple.

As the The Post’s Jena McGregor pointed out Monday, Apple has to play its hand carefully to show that Jobs is healthy enough to come back but also that the company can function without him.

You can see Jobs’s entire pitch here, courtesy of the Cupertino City Council:

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