{"product_id":"explore-alliance-presents-how-do-you-know-episode-26-quenched-galaxies","title":"Explore Alliance Presents: How Do You KNOW? – Episode #26: 'Quenched Galaxies'","description":"\u003cdiv title=\"Page 1\" class=\"page\"\u003e\n\u003cdiv class=\"layoutArea\"\u003e\n\u003cdiv class=\"column\"\u003e\n\u003cdiv class=\"page\" title=\"Page 1\"\u003e\n\u003cp class=\"column\"\u003e\u003cspan\u003eWe normally think of galaxies as some of the largest, brightest structures in the universe \u003c\/span\u003e\u003cspan\u003e– \u003c\/span\u003e\u003cspan\u003ebut that isn\u003c\/span\u003e\u003cspan\u003e’\u003c\/span\u003e\u003cspan\u003et always true. It is star formation that makes galaxies bright. Star forming regions with abundant gas form emission nebulae, dusty regions form reflection nebulae, and the high density regions of gas and dust in a galaxy\u003c\/span\u003e\u003cspan\u003e’\u003c\/span\u003e\u003cspan\u003es disk for the spiral arms that most of us are familiar with. Spiral arms are regions where density waves compress the existing gas and dust resulting in new star formation. It is these large, new, blue stars that create the light that we normally see in galaxies such as Andromeda, Triangulum, the Whirlpool and others.\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"column\"\u003e\u003cspan\u003eDr. Barth walks us through Hubble's discovery of the expansion, Einstein's theory of \u003cmeta charset=\"utf-8\"\u003eusing gravity to focus the light of some of the most distant galaxies observable in the universe. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"layoutArea\"\u003eThe activities and materials provided free for the How Do You Know? program are based upon Dr. Barth’s award-winning book: \u003ca style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 1.4em;\" title=\"Astronomy for Educators Free e-Book\" href=\"https:\/\/scholarworks.uark.edu\/oer\/2\/\" target=\"_blank\"\u003eAstronomy For Educators\u003c\/a\u003e. This book is used as a resource in more than 5,700 schools across the United States and in more than 50 countries world wide. The book is published as an Open Educational Resource Text by the University of Arkansas Library Press.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca title=\"How Do You KNOW? Index of Programs\" href=\"https:\/\/explorescientificusa.com\/pages\/explore-alliance-presents-how-do-you-know-with-dr-daniel-barth\"\u003eReturn to the How Do You KNOW? index of programs\u003c\/a\u003e. \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"page\" title=\"Page 1\"\u003e\n\u003cdiv class=\"layoutArea\"\u003e\n\u003cdiv class=\"column\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":46518262562956,"sku":"sku-40626751045804","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0577\/5858\/0876\/files\/HowDoYouKnow_COLORcopy_a8770659-d922-47ea-b605-7cb28d1a8aba.png?v=1772695480","url":"https:\/\/gobekusa.com\/products\/explore-alliance-presents-how-do-you-know-episode-26-quenched-galaxies","provider":"GobekUSA","version":"1.0","type":"link"}