Halley's comet portrayed on ancient coin Heather Catchpole ABC Science Online Wednesday, 19 May 2004 Could the star shape on the king's crown be Halley's comet? A rare ancient coin may feature an early record of Halley's comet, researchers say. The coin features the head of the Armenian king Tigranes II the Great, who reigned from 95 to 55 BC. A symbol on his crown that features a star with a curved tail may represent the passage of Halley's comet in 87 BC, say the Armenian and Italian researchers. Their research will be published in Astronomy & Geophysics, a journal...