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Real World Events
- February 23: Halo3.com, registered in 2004, transfers ownership from Microsoft's Trout & Zimmer holding company to Microsoft Corporation.[1]
- April 25: Volume 2 of the Halo 2: Original Soundtrack is released.
- May 12: The Halo 3 Announcement Trailer is first shown at E3 2006.[2]
- May 17: The discovery of the extrasolar planet HD 69830, which the Kig-yar homeworld Eayn supposedly orbits, is announced.[3]
- July 19: The Halo Graphic Novel is released.
- September 27: The Halo Wars Announcement Trailer is first shown at the Microsoft X06 media briefing.
- October 31: The novel Halo: Ghosts of Onyx is released.
- December 4: The Starry Night trailer for Halo 3 is released.