{"id":5442,"date":"2016-02-16T00:00:00","date_gmt":"2016-02-15T23:00:00","guid":{"rendered":"https:\/\/www.ieec.cat\/lisa-pathfinder-releases-successfully-test-masses-which-are-already-in-free-fall-inside-the-spacecraft\/"},"modified":"2022-12-22T23:23:05","modified_gmt":"2022-12-22T22:23:05","slug":"lisa-pathfinder-releases-successfully-test-masses-which-are-already-in-free-fall-inside-the-spacecraft","status":"publish","type":"post","link":"https:\/\/www.ieec.cat\/en\/lisa-pathfinder-releases-successfully-test-masses-which-are-already-in-free-fall-inside-the-spacecraft\/","title":{"rendered":"LISA Pathfinder releases successfully test masses which are already in free fall inside the spacecraft"},"content":{"rendered":"<p>[et_pb_section fb_built=&#8221;1&#8243; fullwidth=&#8221;on&#8221; theme_builder_area=&#8221;post_content&#8221; _builder_version=&#8221;4.14.8&#8243; _module_preset=&#8221;default&#8221; height=&#8221;114px&#8221; background_color=&#8221;&#8221; hover_enabled=&#8221;0&#8243; sticky_enabled=&#8221;0&#8243; title_text=&#8221;&#8221; background_image=&#8221;\/wp-content\/uploads\/2022\/04\/slider-corpo2.jpg&#8221;][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; theme_builder_area=&#8221;post_content&#8221; _builder_version=&#8221;4.14.8&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;||0px||false|false&#8221; custom_margin=&#8221;||0px||false|false&#8221; hover_enabled=&#8221;0&#8243; sticky_enabled=&#8221;0&#8243;][et_pb_row _builder_version=&#8221;4.14.8&#8243; _module_preset=&#8221;default&#8221; theme_builder_area=&#8221;post_content&#8221;][et_pb_column _builder_version=&#8221;4.14.8&#8243; _module_preset=&#8221;default&#8221; type=&#8221;4_4&#8243; theme_builder_area=&#8221;post_content&#8221;][et_pb_text _builder_version=&#8221;4.14.8&#8243; _module_preset=&#8221;default&#8221; theme_builder_area=&#8221;post_content&#8221; _dynamic_attributes=&#8221;content&#8221; hover_enabled=&#8221;0&#8243; sticky_enabled=&#8221;0&#8243; custom_margin=&#8221;0px||0px||false|false&#8221; custom_padding=&#8221;0px||0px||false|false&#8221;]@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF90aXRsZSIsInNldHRpbmdzIjp7ImJlZm9yZSI6IjxoMSBjbGFzcz1cImVudHJ5X3RpdGxlXCI+IiwiYWZ0ZXIiOiI8L2gxPiJ9fQ==@[\/et_pb_text][et_pb_text _builder_version=&#8221;4.14.8&#8243; _module_preset=&#8221;default&#8221; theme_builder_area=&#8221;post_content&#8221; _dynamic_attributes=&#8221;content&#8221; custom_padding=&#8221;0px||0px||false|false&#8221; custom_margin=&#8221;0px||0px||false|false&#8221; hover_enabled=&#8221;0&#8243; sticky_enabled=&#8221;0&#8243;]@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF9kYXRlIiwic2V0dGluZ3MiOnsiYmVmb3JlIjoiIiwiYWZ0ZXIiOiIiLCJkYXRlX2Zvcm1hdCI6ImN1c3RvbSIsImN1c3RvbV9kYXRlX2Zvcm1hdCI6IlktbS1kIEg6aTpzIn19@[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;4.14.8&#8243; _module_preset=&#8221;default&#8221; custom_margin=&#8221;0px||||false|false&#8221; custom_padding=&#8221;0px||||false|false&#8221; top_divider_color=&#8221;RGBA(255,255,255,0)&#8221; top_divider_height=&#8221;0px&#8221; hover_enabled=&#8221;0&#8243; global_colors_info=&#8221;{}&#8221; sticky_enabled=&#8221;0&#8243;][et_pb_row column_structure=&#8221;4_4&#8243; _builder_version=&#8221;4.14.8&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.14.8&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_image src=&#8221;https:\/\/www.ieec.cat\/wp-content\/uploads\/2022\/12\/1543421889_5767f9854b70213a2360d8472bc244a3_freely_floating_in_space_large.jpg&#8221; alt=&#8221;LISA Pathfinder releases successfully test masses which are already in free fall inside the spacecraft&#8221; _builder_version=&#8221;4.14.8&#8243; _module_preset=&#8221;default&#8221; title_text=&#8221;PR_Image1.png&#8221; hover_enabled=&#8221;0&#8243; sticky_enabled=&#8221;0&#8243; width=&#8221;600px&#8221; module_alignment=&#8221;center&#8221;][\/et_pb_image][et_pb_text _builder_version=&#8221;4.14.8&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;]Completed the most delicate operation of <a href=\"http:\/\/www.ieec.cat\/ca\/lisa-pathfinder-2015\/\">mission LISA Pathfinder of ESA<\/a> which will test the technology that will allow to detect gravitational waves in space.  It has been released the second test mass; the first one was released yesterday morning. For the first time, the two masses (a pair of identical 46 mm gold\u2013platinum cubes) in the heart of the spacecraft are floating freely. The cubes sit 38 cm apart linked only by laser beams that measure the accurate distance at every moment.<\/p>\n<p>Freely_Floating_in_space_large<\/p>\n<p>The researcher of the Institute of Space Sciences (IEEC-CSIC) Llu\u00eds Gesa has participated in the operation that has been carried out from the European Space Operations Center (ESOC) in Darmstadt, Germany, and he has highlighted the importance of the release: \u201cIt is the first time that we placed two masses in freefall in the space on an experimental basis\u201d. According to the researcher from the LISA gravitational astronomy group \u201cthis was far more critical of the mission since this mechanical and engineering action could not be tested at 100% in Earth because we cannot eliminate the gravitational field\u201d.<\/p>\n<p>It will be another week before the cubes are left completely at the mercy of gravity, with no other forces acting on them. Before that, the masses are controlled inside to follow the spacecraft movement in its flight through space. The next step is to relax this control and make the spacecraft follow the masses in a real free fall.<\/p>\n<p>Once successfully passed the most crucial point of the mission, on March 1st, researchers will begin science mission.<\/p>\n<p>The search for gravitational waves in space<\/p>\n<p>Gravitational waves are minute fluctuations in the fabric of spacetime, predicted by Albert Einstein\u2019s general theory of relativity and directly observed for the first time recently by the Laser Interferometer Gravitational-Wave Observatory \u2013 an announcement that created a worldwide sensation last week.<\/p>\n<p>As this discovery confirmed, ground-based experiments can detect high-frequency gravitational waves from cosmic events such as the coalescence of a pair of stellar remnants, like neutron stars or black holes. However, to observe lower-frequency gravitational waves emitted by different astronomical sources, such as the merging of supermassive black holes at the centre of large galaxies, it is necessary to move the search into space.<\/p>\n<p>There, a future gravitational wave observatory, already identified as the goal for the L3 mission in ESA\u2019s Cosmic Vision programme, will measure distortions in the fabric of spacetime on the inconceivably tiny scale of a few millionths of a millionth of a metre over a distance of a million kilometres.<\/p>\n<p>In the coming months, LISA Pathfinder will verify the fundamental condition needed for such a future gravitational wave observatory: putting test masses into freefall at unprecedented levels of accuracy, by isolating the two cubes from all external and internal forces except one: gravity.<\/p>\n<p><a href=\"http:\/\/www.esa.int\/Our_Activities\/Space_Science\/Test_cubes_floating_freely_inside_LISA_Pathfinder\">More information at ESA website<\/a>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Completed the most delicate operation of mission LISA Pathfinder of ESA which will test the technology that will allow to detect gravitational waves in space. It has been released the second test mass; the first one was released yesterday morning. For the first time, the two masses (a pair of identical 46 mm gold\u2013platinum cubes) [&hellip;]<\/p>\n","protected":false},"author":0,"featured_media":5438,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"2880","footnotes":""},"categories":[71,76],"tags":[],"class_list":["post-5442","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-announcements","category-other-announcements"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>LISA Pathfinder releases successfully test masses which are already in free fall inside the spacecraft - IEEC<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ieec.cat\/en\/lisa-pathfinder-releases-successfully-test-masses-which-are-already-in-free-fall-inside-the-spacecraft\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"LISA Pathfinder releases successfully test masses which are already in free fall inside the spacecraft - IEEC\" \/>\n<meta property=\"og:description\" content=\"Completed the most delicate operation of mission LISA Pathfinder of ESA which will test the technology that will allow to detect gravitational waves in space. 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