The Universe is Much Bigger Than We Thought

How many galaxies are in the universe? This documentary traces the hunt from Kant's island universes to the Hubble Deep Field's 3,000 galaxies in a grain of sand. It covers Henrietta Leavitt's Cepheid ruler, Edwin Hubble's 1923 variable star in Andromeda, the 1995 and 2004 deep fields that suggested 100 billion galaxies, and why later research now estimates two trillion with 90% still unseen. Chapters: 0:00 The Grain of Sand That Changed Everything 0:50 How Many Galaxies Are There? 1:16 The Letter That Destroyed a Universe 2:04 The Great Debate 2:36 The Cosmic Ruler 3:13 The Discovery of Andromeda 3:41 The Hubble Deep Field 4:17 2 Trillion Galaxies 4:44 The Edge of the Observable Universe 5:14 One World Among Countless Others 5:30 Outro Lost Frontier by Kevin MacLeod is licensed under a Creative Commons Attribution 4.0 license. https://creativecommons.org/licenses/... Source: http://incompetech.com/music/royalty-... Artist: http://incompetech.com/ 🚀 Subscribe to Deep Space Mysteries for more space mysteries, extreme planets, and fascinating facts about our universe. Business inquiries: neuraclips21@gmail.com #space #universe #galaxies #education #science