{"id":578,"date":"2026-08-08T10:16:17","date_gmt":"2026-08-08T10:16:17","guid":{"rendered":"https:\/\/baarda.ch\/?p=578"},"modified":"2026-08-08T10:16:17","modified_gmt":"2026-08-08T10:16:17","slug":"gemini-no-you-do-not-need-fuel-or-energy-to-keep-moving-through-space","status":"publish","type":"post","link":"https:\/\/baarda.ch\/?p=578","title":{"rendered":"Gemini: No, you do not need fuel or energy to keep moving through space."},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Once you burn fuel to accelerate your spaceship to a certain speed and point it in a direction, you can turn off your engines completely. The spaceship will coast through space at that exact speed indefinitely without using a single drop of fuel.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Why Spacecraft Don&#8217;t Need Engine Power to Move<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">On Earth, a car needs continuous engine power to stay moving at 100 km\/h because it fights <strong>air resistance<\/strong> and <strong>friction<\/strong> from the road. In the vacuum of space, those friction forces don&#8217;t exist.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This behavior follows <strong>Newton\u2019s First Law of Motion (Inertia)<\/strong>: <em>An object in motion stays in motion with the same speed and in the same direction unless acted upon by an external force.<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The Voyager 1 probe, launched in 1977, turned off its primary thrusters decades ago. It is currently traveling out of the solar system at roughly 38,000 mph (61,000 km\/h) purely on momentum.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">When Spacecraft <em>Do<\/em> Need Fuel or Energy<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">While you don&#8217;t need energy to <em>stay<\/em> moving, a spaceship still requires energy for three specific actions:<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>To Change Speed or Direction:<\/strong> To go faster, slow down, or turn, you must fire rocket thrusters to exert a force.<\/li>\n\n\n\n<li><strong>To Fight Gravity:<\/strong> If you are in Low Earth Orbit (like the International Space Station at ~400 km altitude), tiny traces of Earth&#8217;s upper atmosphere create &#171;atmospheric drag.&#187; Spacecraft in low orbits occasionally fire small thrusters (a &#171;reboost&#187;) to avoid falling back into Earth&#8217;s atmosphere.<\/li>\n\n\n\n<li><strong>To Run Onboard Systems:<\/strong> Life support, navigation computers, heat controls, and communications require electrical energy\u2014typically powered by solar panels or nuclear generators (RTGs), separate from rocket fuel.<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">Summary<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>To cruise in a straight line:<\/strong> 0 fuel required.<\/li>\n\n\n\n<li><strong>To change velocity, steer, or land:<\/strong> Fuel is required.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Question<\/strong>: <strong>Is there any progress on anti gravitional lifting equipment?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Gemini<\/strong>: There is <strong>no progress on true &#171;anti-gravity&#187;<\/strong> (manipulating, shielding, or canceling gravitational fields) because it remains impossible under known physics. General relativity dictates that mass-energy is always attractive, and experiments (such as CERN&#8217;s ALPHA-g project) have confirmed that even antimatter falls downward like ordinary matter.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">However, depending on what context you mean by &#171;anti-gravity lifting equipment,&#187; there are significant real-world technologies that achieve &#171;gravity-defying&#187; effects:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. Medical &amp; Rehabilitation Equipment<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">If you have heard of &#171;anti-gravity treadmills&#187; or lifting gear in physical therapy:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Differential Air Pressure (DAP) Systems:<\/strong> Equipment like the <strong>AlterG Anti-Gravity Treadmill<\/strong> uses an airtight chamber inflated around the lower body. By pressurizing the air, it lifts the body and reduces a patient&#8217;s effective weight by up to 80%, allowing low-impact post-surgery rehabilitation.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2. Industrial &#171;Zero-Gravity&#187; Lifting Systems<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">In manufacturing and logistics, factory equipment designed to make heavy loads feel weightless is commonly referred to as &#171;zero-gravity&#187; or &#171;anti-gravity&#187; lifters:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Intelligent Assist Devices (IADs) &amp; Servo-Balancers:<\/strong> These overhead hoists use force sensors and computer-controlled electric motors or pneumatic systems to continuously sense operator input and counteract the weight of heavy components (e.g., engines, steel plates). Operators can move 200 kg loads using just a few grams of fingertip pressure.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">3. Alternative Levitation Technologies (Physics)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Where physical forces offset gravitational pull without changing gravity itself:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Magnetic Levitation (Maglev):<\/strong> Uses high-powered electromagnets or superconductors (quantum locking) to suspend heavy loads, train cars, or industrial bearings completely without friction.<\/li>\n\n\n\n<li><strong>Acoustic &amp; Electrohydrodynamic Levitation:<\/strong> High-frequency sound waves (acoustic tweezers) or ionized air (ion thrusters\/lifters) are used to lift small objects and liquid droplets in laboratory settings.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Once you burn fuel to accelerate your spaceship to a certain speed and point it in a direction, you can turn off your engines completely. The spaceship will coast through space at that exact speed indefinitely without using a single drop of fuel. Why Spacecraft Don&#8217;t Need Engine Power to Move On Earth, a car &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/baarda.ch\/?p=578\" class=\"more-link\"><span class=\"screen-reader-text\">&#171;Gemini: No, you do not need fuel or energy to keep moving through space.&#187;<\/span> weiterlesen<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-578","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/baarda.ch\/index.php?rest_route=\/wp\/v2\/posts\/578","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/baarda.ch\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/baarda.ch\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/baarda.ch\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/baarda.ch\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=578"}],"version-history":[{"count":1,"href":"https:\/\/baarda.ch\/index.php?rest_route=\/wp\/v2\/posts\/578\/revisions"}],"predecessor-version":[{"id":579,"href":"https:\/\/baarda.ch\/index.php?rest_route=\/wp\/v2\/posts\/578\/revisions\/579"}],"wp:attachment":[{"href":"https:\/\/baarda.ch\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=578"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/baarda.ch\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=578"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/baarda.ch\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=578"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}