{"product_id":"2940169636444","title":"Ringworld","description":"\u003cp\u003eWelcome to Ringworld, an intermediate step between Dyson Spheres and planets. Ninety-three million miles in radiusamp;mdash;the equivalent of one Earth orbit or 600 miles longamp;mdash;1,000 meters thick, and much sturdier than a Dyson sphere.\u003c\/p\u003e\u003cp\u003eWhat other advantages are there to this world? The gravitational force created by a rotation on its axis of 770 miles per second means no need for a roof. Walls 1,000 miles high at each rim will let in the sun and prevent much air from escaping.\u003c\/p\u003e","brand":"Blackstone Audio, Inc.","offers":[{"title":"Default Title","offer_id":47098058539248,"sku":"2940169636444","price":20.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0737\/7593\/9824\/files\/2940169636444_p0.jpg?v=1763689735","url":"https:\/\/shop-qa.barnesandnoble.com\/products\/2940169636444","provider":"Barnes \u0026 Noble (DEV)","version":"1.0","type":"link"}