{"id":56950,"date":"2026-03-23T10:41:35","date_gmt":"2026-03-23T10:41:35","guid":{"rendered":"https:\/\/bis-space.com\/shop\/?post_type=product&#038;p=56950"},"modified":"2026-03-23T16:46:16","modified_gmt":"2026-03-23T16:46:16","slug":"jbis-079-03-0107","status":"publish","type":"product","link":"https:\/\/bis-space.com\/shop\/product\/jbis-079-03-0107\/","title":{"rendered":"Giant Planet Lagrange Points L2 as Locations for Photon Sail Manufacturing Facilities"},"content":{"rendered":"","protected":false},"excerpt":{"rendered":"<p class=\"p2\"><b>Gregory L. Matloff<\/b><b><\/b><\/p>\n<p>2026.079.0107<\/p>\n<p class=\"p1\"><b>DOI <a href=\"https:\/\/doi.org\/10.59332\/jbis-079-03-0107\">https:\/\/doi.org\/10.59332\/jbis-079-03-0107<\/a><\/b><\/p>\n<p class=\"p1\">Interstellar exploration or colonization ventures by humans will be major undertakings that will likely require utilization of solar system resources. If photon sailing by Sunlight using Sun-diving maneuvers or propulsion by beamed lasers \/masers is the preferred method of interstellar travel, it may be necessary to manufacture the required huge and hyper-thin sails in space. An ideal site for a sail manufacturing facility would be permanently shaded from the Sun. This paper investigates planet-Sun Lagrange 2 (L2) points as possible locations for such facilities. Using a simple geometric construction, it is demonstrated that Sun-Venus and Sun-Earth L2 are located in the shadow\u2019s penumbra and are therefore not suitable for this application. But giant planet Lagrange 2 points are all within the shadow umbra and are totally shaded from solar irradiation. The estimated diameters of the shaded regions at Sun-Jupiter and Sun-Saturn L2 are both greater than 50,000 km in diameter.<\/p>\n<p class=\"p1\"><b>Keywords: <\/b>Interstellar Photon Sailing, In-space manufacturing, Sun-Planet L2 Points<\/p>\n","protected":false},"featured_media":56900,"template":"","meta":[],"pwb-brand":[],"product_brand":[],"product_cat":[3911],"product_tag":[],"class_list":["post-56950","product","type-product","status-publish","has-post-thumbnail","product_cat-2026-papers","first","instock","downloadable","virtual","purchasable","product-type-simple","czr-hentry"],"jetpack_sharing_enabled":true,"brands":[],"_links":{"self":[{"href":"https:\/\/bis-space.com\/shop\/wp-json\/wp\/v2\/product\/56950","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bis-space.com\/shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/bis-space.com\/shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/bis-space.com\/shop\/wp-json\/wp\/v2\/media\/56900"}],"wp:attachment":[{"href":"https:\/\/bis-space.com\/shop\/wp-json\/wp\/v2\/media?parent=56950"}],"wp:term":[{"taxonomy":"pwb-brand","embeddable":true,"href":"https:\/\/bis-space.com\/shop\/wp-json\/wp\/v2\/pwb-brand?post=56950"},{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/bis-space.com\/shop\/wp-json\/wp\/v2\/product_brand?post=56950"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/bis-space.com\/shop\/wp-json\/wp\/v2\/product_cat?post=56950"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/bis-space.com\/shop\/wp-json\/wp\/v2\/product_tag?post=56950"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}