Pedigree of Halley's Comet

Horse	Parents	Grand-Parents	Great Grand-Parents	Great-Great Grand-Parents
Halley's Comet Shetland Pony	Horsehead Nebula Shetland Pony	Leo Shetland Pony	Foundation	Foundation
				Foundation
			Foundation	Foundation
				Foundation
		Aries Shetland Pony	Foundation	Foundation
				Foundation
			Foundation	Foundation
				Foundation
	Omega Nebula Shetland Pony	Sagittarius Shetland Pony	Foundation	Foundation
				Foundation
			Foundation	Foundation
				Foundation
		Virgo Shetland Pony	Foundation	Foundation
				Foundation
			Foundation	Foundation
				Foundation

Currently...