These are Facebook’s new offices [photos]

Say hello to Facebook’s new offices, mostly abandoned former Head Office of Sun Microsystems.

Tomorrow, Facebook will hold to announce a press conference has moved to Menlo Park. The company has since 2004 in Palo Alto based but its current campus (leased from Stanford) simply not support Facebook’s swelling ranks.

Our sources tell us that Facebook where fact will announce it has acquired the old 57 acre Sun Microsystems campus Oracle, Sun acquired in 2009. Since Oracle has slowly moved Sun Microsystems staff in other offices. Now, the former Sun campus mostly except for a few building is aborted.

Facebook is also rumored 312 and 314 Constitution Avenue, a little less than a mile away from the Sun Microsystems main campus purchased. Mashable has learned that these buildings were previously owned by General Motors and are part of a larger complex owned by Tyco Electronics.

Tyco sold the building to General Motors “long ago” according to our source; but when recently submitted paperwork is any indication, Facebook is now the owner of two buildings. Have the potential for storage, parking or servers used. We highly doubt that they would be used as office space.

It not Announces many details, yet that given. When will Facebook move his employee in Menlo Park? Get to bring a special deal on property taxes in exchange for further work in the city? He acquired all other buildings? These are things that we’ll find out tomorrow at a press conference.