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Explore big discoveries that have revolutionized our understanding of the universe. Official Website: https://to.pbs.org/3QMiyEm | #novapbs How big is the universe? If it began with the Big Bang, will it also have an end? Is there life beyond our planet? Questions like these inspired the launch of Voyager I in 1977 and have driven innovative space research and exploration ever since. Trace ground-breaking discoveries that have transformed our picture of the universe, from an age when we knew of no planets beyond our solar system, to today, when we have evidence of thousands and estimate trillions more. And follow the teams trying to solve two of the biggest mysteries in cosmology today: What are dark matter and dark energy? Chapters 00:00 Introduction 10:09 The Discovery and Acceptance of Dark Matter 18:57 Searching for WIMPs: Weakly Interactive Massive Particles 24:45 The Discovery of an Expanding Universe 39:00 What is Dark Energy? 49:12 Conclusion © 2024 WGBH Educational Foundation All rights reserved This program was produced by GBH, which is solely responsible for its content. This program is made possible by viewers like you. Support your local PBS station here: https://pbs.org/donate/ Enjoy full episodes of your favorite PBS shows anytime, anywhere with the free PBS app: https://to.pbs.org/2QbtzhR Stay up to date on the latest science discoveries, full episodes, articles, videos, and more by signing up for NOVA's newsletter here: https://www.pbs.org/wgbh/nova/newsletter/ FOLLOW US: NOVA YouTube: https://www.youtube.com/novaonline Facebook: https://www.facebook.com/NOVApbs ​ X: https://twitter.com/novapbs ​ Instagram: https://www.instagram.com/novapbs/ TikTok: https://www.tiktok.com/@novapbs PBS Facebook: https://www.facebook.com/PBS/ X: https://twitter.com/PBS/ Instagram: https://www.instagram.com/PBS/ YouTube: https://www.youtube.com/PBS/ TikTok: https://www.tiktok.com/@pbs Shop: https://shop.pbs.org/ Voyager 1, dark matter, dark energy, supernova, hubble constant, is the universe expanding? #darkenergy #darkmatter #astrophysics