{"id":1140,"date":"2004-11-19T09:43:00","date_gmt":"2004-11-19T08:43:00","guid":{"rendered":"https:\/\/kids.esa.int\/sailing_through_space\/"},"modified":"2026-10-09T11:30:53","modified_gmt":"2026-10-09T09:30:53","slug":"sailing_through_space","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/el\/sailing_through_space\/","title":{"rendered":"\u03a4\u03b1\u03be\u03b9\u03b4\u03b5\u03cd\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c3\u03c4\u03bf \u03b4\u03b9\u03ac\u03c3\u03c4\u03b7\u03bc\u03b1"},"content":{"rendered":"
\n

\u039c\u03ad\u03c7\u03c1\u03b9 \u03c3\u03ae\u03bc\u03b5\u03c1\u03b1, \u03c3\u03c7\u03b5\u03b4\u03cc\u03bd \u03cc\u03bb\u03b5\u03c2 \u03bf\u03b9 \u03b4\u03b9\u03b1\u03c3\u03c4\u03b7\u03bc\u03b9\u03ba\u03ad\u03c2 \u03b1\u03c0\u03bf\u03c3\u03c4\u03bf\u03bb\u03ad\u03c2 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03bf\u03cd\u03c3\u03b1\u03bd \u03ba\u03b9\u03bd\u03b7\u03c4\u03ae\u03c1\u03b5\u03c2 \u03c0\u03c5\u03c1\u03b1\u03cd\u03bb\u03c9\u03bd \u03c0\u03bf\u03c5 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03bf\u03cd\u03bd \u03bc\u03b5 \u03c7\u03b7\u03bc\u03b9\u03ba\u03ac \u03ba\u03b1\u03cd\u03c3\u03b9\u03bc\u03b1. \u0394\u03c5\u03c3\u03c4\u03c5\u03c7\u03ce\u03c2, \u03b1\u03c5\u03c4\u03bf\u03af \u03b4\u03b5\u03bd \u03b5\u03af\u03bd\u03b1\u03b9 \u03b9\u03b4\u03b9\u03b1\u03af\u03c4\u03b5\u03c1\u03b1 \u03b1\u03c0\u03bf\u03b4\u03bf\u03c4\u03b9\u03ba\u03bf\u03af. \u0393\u03b9\u03b1 \u03c0\u03b1\u03c1\u03ac\u03b4\u03b5\u03b9\u03b3\u03bc\u03b1, \u03c0\u03ac\u03bd\u03c9 \u03b1\u03c0\u03cc \u03c4\u03bf \u03ae\u03bc\u03b9\u03c3\u03c5 \u03c4\u03bf\u03c5 \u03b2\u03ac\u03c1\u03bf\u03c5\u03c2 \u03b5\u03ba\u03c4\u03cc\u03be\u03b5\u03c5\u03c3\u03b7\u03c2 \u03c4\u03bf\u03c5 \u03b4\u03b9\u03b1\u03c3\u03c4\u03b7\u03bc\u03b9\u03ba\u03bf\u03cd \u03c3\u03ba\u03ac\u03c6\u03bf\u03c5\u03c2 \u00abRosetta\u00bb \u03c4\u03b7\u03c2 ESA \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03bf\u03cd\u03c4\u03b1\u03bd \u03b1\u03c0\u03cc \u03ba\u03b1\u03cd\u03c3\u03b9\u03bc\u03b1.<\/p>\n<\/div>\n

\u0397 ESA \u03bc\u03b5\u03bb\u03b5\u03c4\u03ac \u03c0\u03bb\u03ad\u03bf\u03bd \u03c4\u03c1\u03cc\u03c0\u03bf\u03c5\u03c2 \u03b3\u03b9\u03b1 \u03c4\u03b7 \u03bc\u03b5\u03af\u03c9\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03c0\u03bf\u03c3\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2 \u03ba\u03b1\u03c5\u03c3\u03af\u03bc\u03bf\u03c5 \u03c0\u03bf\u03c5 \u03bc\u03b5\u03c4\u03b1\u03c6\u03ad\u03c1\u03b5\u03c4\u03b1\u03b9. \u039c\u03b9\u03b1 \u03b9\u03b4\u03ad\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b7 \u03c7\u03c1\u03ae\u03c3\u03b7 \u03b9\u03c9\u03bd\u03b9\u03ba\u03bf\u03cd \u03ba\u03b9\u03bd\u03b7\u03c4\u03ae\u03c1\u03b1, \u03bf \u03bf\u03c0\u03bf\u03af\u03bf\u03c2 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03b5\u03af \u03ad\u03bd\u03b1 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03cc \u2018\u03cc\u03c0\u03bb\u03bf\u2019 \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03b5\u03ba\u03c4\u03bf\u03be\u03b5\u03cd\u03b5\u03b9 \u03b1\u03ad\u03c1\u03b9\u03bf \u03c3\u03c4\u03bf \u03b4\u03b9\u03ac\u03c3\u03c4\u03b7\u03bc\u03b1.<\/p>\n

\u0391\u03bd \u03ba\u03b1\u03b9 \u03b7 \u03ce\u03b8\u03b7\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03ba\u03b9\u03bd\u03b7\u03c4\u03ae\u03c1\u03b1 \u03c0\u03c1\u03bf\u03c2 \u03c4\u03b1 \u03b5\u03bc\u03c0\u03c1\u03cc\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c0\u03bf\u03bb\u03cd \u03bc\u03b9\u03ba\u03c1\u03ae, \u03b7 \u03c4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03b1 \u03b1\u03c5\u03be\u03ac\u03bd\u03b5\u03c4\u03b1\u03b9 \u03c3\u03c4\u03b1\u03b4\u03b9\u03b1\u03ba\u03ac. \u03a4\u03b5\u03bb\u03b9\u03ba\u03ac, \u03b1\u03c5\u03c4\u03cc \u03b5\u03c0\u03b9\u03c4\u03c1\u03ad\u03c0\u03b5\u03b9 \u03c3\u03c4\u03bf \u03b4\u03b9\u03b1\u03c3\u03c4\u03b7\u03bc\u03b9\u03ba\u03cc \u03c3\u03ba\u03ac\u03c6\u03bf\u03c2 \u03bd\u03b1 \u03c4\u03b1\u03be\u03b9\u03b4\u03b5\u03cd\u03b5\u03b9 \u03c0\u03bf\u03bb\u03cd \u03b3\u03c1\u03ae\u03b3\u03bf\u03c1\u03b1.<\/p>\n

\"Artist's
\u0391\u03c0\u03b5\u03b9\u03ba\u03cc\u03bd\u03b9\u03c3\u03b7 \u03c4\u03bf\u03c5 SMART-1 \u03b1\u03c0\u03cc \u03ba\u03b1\u03bb\u03bb\u03b9\u03c4\u03ad\u03c7\u03bd\u03b7<\/figcaption><\/figure>\n

\u039f SMART-1 \u03c0\u03c1\u03b1\u03b3\u03bc\u03b1\u03c4\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03b5 \u03bc\u03b5 \u03b5\u03c0\u03b9\u03c4\u03c5\u03c7\u03af\u03b1 \u03b4\u03bf\u03ba\u03b9\u03bc\u03ae \u03b5\u03bd\u03cc\u03c2 \u03ba\u03b9\u03bd\u03b7\u03c4\u03ae\u03c1\u03b1 \u03b9\u03cc\u03bd\u03c4\u03c9\u03bd \u03ba\u03b1\u03c4\u03ac \u03c4\u03b7 \u03b4\u03b9\u03ac\u03c1\u03ba\u03b5\u03b9\u03b1 \u03c4\u03b7\u03c2 \u03c0\u03bf\u03c1\u03b5\u03af\u03b1\u03c2 \u03c4\u03bf\u03c5 \u03c0\u03c1\u03bf\u03c2 \u03c4\u03b7 \u03a3\u03b5\u03bb\u03ae\u03bd\u03b7. \u039f \u03ba\u03b9\u03bd\u03b7\u03c4\u03ae\u03c1\u03b1\u03c2 \u03c0\u03b1\u03c1\u03ae\u03b3\u03b1\u03b3\u03b5 10 \u03c6\u03bf\u03c1\u03ad\u03c2 \u03bc\u03b5\u03b3\u03b1\u03bb\u03cd\u03c4\u03b5\u03c1\u03b7 \u03ce\u03b8\u03b7\u03c3\u03b7 \u03b1\u03c0\u03cc \u03ad\u03bd\u03b1\u03bd \u03c3\u03c5\u03bd\u03b7\u03b8\u03b9\u03c3\u03bc\u03ad\u03bd\u03bf \u03c0\u03c5\u03c1\u03b1\u03c5\u03bb\u03b9\u03ba\u03cc \u03ba\u03b9\u03bd\u03b7\u03c4\u03ae\u03c1\u03b1 \u03b3\u03b9\u03b1 \u03ba\u03ac\u03b8\u03b5 \u03ba\u03b9\u03bb\u03cc \u03ba\u03b1\u03c5\u03c3\u03af\u03bc\u03bf\u03c5 \u03c0\u03bf\u03c5 \u03ba\u03b1\u03c4\u03b1\u03bd\u03ac\u03bb\u03c9\u03bd\u03b5.<\/p>\n

\u0397 ESA \u03bc\u03b5\u03bb\u03b5\u03c4\u03ac \u03b5\u03c0\u03af\u03c3\u03b7\u03c2 \u03b4\u03b9\u03b1\u03c3\u03c4\u03b7\u03bc\u03b9\u03ba\u03ac \u03c3\u03ba\u03ac\u03c6\u03b7 \u03c0\u03bf\u03c5 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03bf\u03cd\u03bd \u03b7\u03bb\u03b9\u03b1\u03ba\u03ac \u03c0\u03b1\u03bd\u03b9\u03ac \u03b1\u03bd\u03c4\u03af \u03b3\u03b9\u03b1 \u03ba\u03b9\u03bd\u03b7\u03c4\u03ae\u03c1\u03b5\u03c2. \u03a4\u03bf \u03b7\u03bb\u03b9\u03b1\u03ba\u03cc \u03c6\u03c9\u03c2 \u03c0\u03bf\u03c5 \u03c0\u03c1\u03bf\u03c3\u03c0\u03af\u03c0\u03c4\u03b5\u03b9 \u03c3\u03b5 \u03ad\u03bd\u03b1 \u03bc\u03b5\u03b3\u03ac\u03bb\u03bf \u03c0\u03b1\u03bd\u03af \u03c0\u03bf\u03c5 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03b5\u03af \u03c3\u03b1\u03bd \u03ba\u03b1\u03b8\u03c1\u03ad\u03c6\u03c4\u03b7\u03c2 \u03b8\u03b1 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03c9\u03b8\u03ae\u03c3\u03b5\u03b9 \u03ad\u03bd\u03b1 \u03b4\u03b9\u03b1\u03c3\u03c4\u03b7\u03bc\u03b9\u03ba\u03cc \u03c3\u03ba\u03ac\u03c6\u03bf\u03c2 \u03c0\u03c1\u03bf\u03c2 \u03ac\u03bb\u03bb\u03bf\u03c5\u03c2 \u03c0\u03bb\u03b1\u03bd\u03ae\u03c4\u03b5\u03c2. \u039c\u03b5\u03c4\u03ac \u03b1\u03c0\u03cc \u03c0\u03bf\u03bb\u03bb\u03bf\u03cd\u03c2 \u03bc\u03ae\u03bd\u03b5\u03c2, \u03ad\u03bd\u03b1 \u03c4\u03ad\u03c4\u03bf\u03b9\u03bf \u03b4\u03b9\u03b1\u03c3\u03c4\u03b7\u03bc\u03b9\u03ba\u03cc \u03c3\u03ba\u03ac\u03c6\u03bf\u03c2 \u03b8\u03b1 \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03c3\u03b5 \u03bd\u03b1 \u03c6\u03c4\u03ac\u03c3\u03b5\u03b9 \u03c3\u03b5 \u03c4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03b1 360.000 \u03c7\u03bb\u03bc.\/\u03ce\u03c1\u03b1.<\/p>\n

\u0388\u03bd\u03b1\u03c2 \u03ac\u03bb\u03bb\u03bf\u03c2 \u03c4\u03c1\u03cc\u03c0\u03bf\u03c2 \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03b5\u03be\u03bf\u03b9\u03ba\u03bf\u03bd\u03cc\u03bc\u03b7\u03c3\u03b7 \u03ba\u03b1\u03c5\u03c3\u03af\u03bc\u03bf\u03c5 \u03ba\u03b1\u03b9 \u03b2\u03ac\u03c1\u03bf\u03c5\u03c2 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b7 \u03bc\u03b5\u03af\u03c9\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03c4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03b1\u03c2 \u03bc\u03ad\u03c3\u03c9 \u03c4\u03b7\u03c2 \u03c0\u03c4\u03ae\u03c3\u03b7\u03c2 \u03bc\u03ad\u03c3\u03b1 \u03c3\u03c4\u03b7\u03bd \u03b1\u03bd\u03ce\u03c4\u03b5\u03c1\u03b7 \u03b1\u03c4\u03bc\u03cc\u03c3\u03c6\u03b1\u03b9\u03c1\u03b1 \u03b5\u03bd\u03cc\u03c2 \u03c0\u03bb\u03b1\u03bd\u03ae\u03c4\u03b7. \u0397 ESA \u03c3\u03c7\u03b5\u03b4\u03b9\u03ac\u03b6\u03b5\u03b9 \u03bd\u03b1 \u03ba\u03b1\u03c4\u03b1\u03c3\u03ba\u03b5\u03c5\u03ac\u03c3\u03b5\u03b9 \u03ad\u03bd\u03b1 \u03b4\u03b9\u03b1\u03c3\u03c4\u03b7\u03bc\u03b9\u03ba\u03cc \u03c3\u03ba\u03ac\u03c6\u03bf\u03c2 \u03c0\u03bf\u03c5 \u03b8\u03b1 \u03b5\u03b9\u03c3\u03ad\u03bb\u03b8\u03b5\u03b9 \u03c3\u03b5 \u03c4\u03c1\u03bf\u03c7\u03b9\u03ac \u03b3\u03cd\u03c1\u03c9 \u03b1\u03c0\u03cc \u03c4\u03bf\u03bd \u0386\u03c1\u03b7 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03ce\u03bd\u03c4\u03b1\u03c2 \u03b1\u03c5\u03c4\u03ae \u03c4\u03b7 \u03bc\u03ad\u03b8\u03bf\u03b4\u03bf \u2018\u03b1\u03b5\u03c1\u03bf\u03c3\u03cd\u03bb\u03bb\u03b7\u03c8\u03b7\u03c2\u2019.<\/p>","protected":false},"excerpt":{"rendered":"

Until now, nearly all space missions have used rocket motors that feed on chemical fuel. Unfortunately, these are not very efficient. For example, over half the launch weight of ESA’s […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"esa_banner_image":"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2003\/04\/close-up_view_of_smart-1_s_stationary_plasma_thruster2\/17900310-2-eng-GB\/Close-up_view_of_SMART-1_s_stationary_plasma_thruster.jpg","esa_banner_description":"Close-up view of SMART-1's stationary plasma thruster","esa_banner_credit":"ESA 2002. Illustration by Medialab.","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2003\/04\/Close-up_view_of_SMART-1_s_stationary_plasma_thruster2","esa_external_url":"","esa_external_new_window":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":true},"categories":[10,44,40],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-1140","post","type-post","status-publish","format-standard","hentry","category-learn","category-spacecraft","category-technology","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/el\/wp-json\/wp\/v2\/posts\/1140","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/el\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/el\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/el\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/el\/wp-json\/wp\/v2\/comments?post=1140"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/el\/wp-json\/wp\/v2\/posts\/1140\/revisions"}],"predecessor-version":[{"id":4867,"href":"https:\/\/kids.esa.int\/el\/wp-json\/wp\/v2\/posts\/1140\/revisions\/4867"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/el\/wp-json\/wp\/v2\/media?parent=1140"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/el\/wp-json\/wp\/v2\/categories?post=1140"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/el\/wp-json\/wp\/v2\/tags?post=1140"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/el\/wp-json\/wp\/v2\/panel?post=1140"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/el\/wp-json\/wp\/v2\/language?post=1140"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/el\/wp-json\/wp\/v2\/age?post=1140"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/el\/wp-json\/wp\/v2\/duration?post=1140"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/el\/wp-json\/wp\/v2\/resource_type?post=1140"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/el\/wp-json\/wp\/v2\/audience?post=1140"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/el\/wp-json\/wp\/v2\/wf_post_folders?post=1140"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}