{"id":637125,"date":"2026-10-21T07:22:09","date_gmt":"2026-10-21T07:22:09","guid":{"rendered":"https:\/\/www.newsbeep.com\/nz\/637125\/"},"modified":"2026-10-21T07:22:09","modified_gmt":"2026-10-21T07:22:09","slug":"apod-2026-october-21-new-ghosts-revealed-in-cassiopeia","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/nz\/637125\/","title":{"rendered":"APOD: 2026 October 21 &#8211; New Ghosts Revealed in Cassiopeia"},"content":{"rendered":"<p class=\"p-md margin-0 media-detail-hero__description\">\n\t\t\t\t\t\t\tExplanation: Jinkies, look at all those ghosts! It took 100 hours of observation and a special oxygen <a href=\"https:\/\/www.schoolsobservatory.org\/learn\/telescopes\/how\/filters\" rel=\"nofollow noopener\" target=\"_blank\">filter<\/a> for <a href=\"https:\/\/app.astrobin.com\/i\/6b6z2r\" rel=\"nofollow noopener\" target=\"_blank\">today\u2019s image<\/a> to capture three faint <a href=\"https:\/\/science.nasa.gov\/universe\/stories\/quick-reads\/decoding-nebulae\/\" rel=\"nofollow noopener\" target=\"_blank\">nebulas<\/a> hidden in the <a href=\"https:\/\/noirlab.edu\/public\/education\/constellations\/cassiopeia\/\" rel=\"nofollow noopener\" target=\"_blank\">Cassiopeia constellation<\/a>. IC 59 and <a href=\"https:\/\/science.nasa.gov\/asset\/hubble\/ic-63-ghost-nebula\/\" rel=\"nofollow noopener\" target=\"_blank\">IC 63<\/a>, the original <a href=\"https:\/\/science.nasa.gov\/image-article\/apod-2025-october-31-ghosts-in-cassiopeia\/\" rel=\"nofollow noopener\" target=\"_blank\">Ghosts of Cassiopeia<\/a>, haunt the region near multi-star system <a href=\"https:\/\/archive.aavso.org\/vsots_gammacas\" rel=\"nofollow noopener\" target=\"_blank\">\u03b3 Cassiopeia<\/a>. <a href=\"https:\/\/science.nasa.gov\/ems\/10_ultravioletwaves\/\" rel=\"nofollow noopener\" target=\"_blank\">Energetic light<\/a> from \u03b3 Cassiopeia causes the hydrogen gas in IC 59 and 63 to glow red. Their <a href=\"https:\/\/science.nasa.gov\/universe\/stories\/quick-reads\/be-glad-you-dont-have-to-dust-in-space\/\" rel=\"nofollow noopener\" target=\"_blank\">dust<\/a> reflects and scatters some blue-ish white starlight. Newly discovered Objects 1, 2, and 3 appear as blue phantoms, revealing the presence of ionized oxygen. But ionized by what? Like at the bow of a speeding boat, \u03b3 Cassiopeia may be piling up material as the system moves through interstellar gas and dust. It follows that Object 3 may be the compressed and heated oxygen of that <a href=\"https:\/\/science.nasa.gov\/science-research\/astrophysics\/cosmic-bow-shocks\/\" rel=\"nofollow noopener\" target=\"_blank\">bow shock<\/a>. Object 1 could be a <a href=\"https:\/\/science.nasa.gov\/image-article\/apod-2026-june-22-m27-the-dumbbell-nebula\/\" rel=\"nofollow noopener\" target=\"_blank\">planetary nebula<\/a> if a central <a href=\"https:\/\/imagine.gsfc.nasa.gov\/science\/objects\/dwarfs1.html\" rel=\"nofollow noopener\" target=\"_blank\">white dwarf<\/a> is identified. The origins of these astronomical apparitions remain a mystery to be solved.<\/p>\n<p>Tomorrow&#8217;s picture: it&#8217;s not easy being green\t\t\t\t\t\t<\/p>\n","protected":false},"excerpt":{"rendered":"Explanation: Jinkies, look at all those ghosts! It took 100 hours of observation and a special oxygen filter&hellip;\n","protected":false},"author":2,"featured_media":637126,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[271739,111,139,69,147,392],"class_list":["post-637125","post","type-post","status-publish","format-standard","has-post-thumbnail","category-space","tag-apod","tag-new-zealand","tag-newzealand","tag-nz","tag-science","tag-space"],"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/posts\/637125","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/comments?post=637125"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/posts\/637125\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/media\/637126"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/media?parent=637125"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/categories?post=637125"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/tags?post=637125"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}