For instance, you all saw the HALE - BOPP comet in the sky. Some states commemorated the passage of that comet with stamps or souvenir sheet.
In 1986, the Giotto probe went through the tail of the Halley during its return journey. That event enabled us to offer you a wonderful album. The most popular comet (Mesopotamian writing, fresco of Jesus' crib, "Bayeux tapestry", etc.), Halley, makes here its ultimate orbit, given that its fragments are now scattered into space.