{"product_id":"explore-alliance-presents-how-do-you-know-episode-51-understanding-planetary-nebulae","title":"Explore Alliance Presents: How Do You KNOW? – Episode #51: ''Understanding Planetary Nebulae\"","description":"\u003cdiv title=\"Page 1\" class=\"page\"\u003e\n\u003cp class=\"p2\" data-mce-fragment=\"1\"\u003e\u003cspan class=\"Apple-converted-space\" data-mce-fragment=\"1\"\u003e\u003cspan\u003ePlanetary nebulae are some of the most beautiful and intriguing deep sky objects in the Milky Way. They reveal the expanding, glowing shells of their parent star as an emission nebula \u003cmeta charset=\"utf-8\"\u003egas ejected from red giant stars late in their lives. Discovered in the late 1700's planetary nebulae are unrelated to planets, William Herschel popularized the name as these compact, round shaped objects were described as \"fading planets\". \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p2\" data-mce-fragment=\"1\"\u003e\u003cspan class=\"Apple-converted-space\" data-mce-fragment=\"1\"\u003e\u003cspan\u003ePlanetary nebulae teach us a lot about stellar evolution, and through spectral analysis we can gain a greater understanding of how elements are formed. \u003c\/span\u003e\u003c\/span\u003eThis the topic of Dr. Daniel Barth in the 51st How Do You KNOW?\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv class=\"layoutArea\"\u003e\n\u003cdiv class=\"column\"\u003e\n\u003cdiv class=\"page\" title=\"Page 1\"\u003e\n\u003cdiv class=\"layoutArea\"\u003e\n\u003cdiv class=\"column\"\u003e\n\u003cp title=\"Page 1\" class=\"page\"\u003ehttps:\/\/explorescientificusa.com\/pages\/explore-alliance-presents-how-do-you-know-with-dr-daniel-barth\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eThe activities and materials provided free for the How Do You Know? program are based upon Dr. Barth’s award-winning book:\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/scholarworks.uark.edu\/oer\/2\/\" title=\"Astronomy for Educators Free e-Book\" 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. Published as an Open Educational Resource Text, it is made available from the University of Arkansas Library Press.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/explorescientificusa.com\/pages\/explore-alliance-presents-how-do-you-know-with-dr-daniel-barth\" title=\"How Do You KNOW? Index of Programs\"\u003eReturn to the How Do You KNOW? index of programs\u003c\/a\u003e. \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"page\" title=\"Page 1\"\u003ehttps:\/\/explorescientificusa.com\/pages\/explore-alliance-presents-how-do-you-know-with-dr-daniel-barth\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e The 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. Published as an Open Educational Resource Text, it is made available from the University of Arkansas Library Press.\u003c\/p\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":46518261121164,"sku":"sku-41793717895340","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0577\/5858\/0876\/files\/planetarynasa_09a42823-bc01-4ade-8024-7fa8ba05745a.jpg?v=1772695478","url":"https:\/\/gobekusa.com\/products\/explore-alliance-presents-how-do-you-know-episode-51-understanding-planetary-nebulae","provider":"GobekUSA","version":"1.0","type":"link"}