[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-154934-105":3,"detail-sidebar-cat-0-en-105":81,"doc-detail-154934-en":130},{"code":4,"msg":5,"data":6},0,"ok",{"site_id":7,"language":8,"slug":9,"title":10,"keywords":11,"description":12,"schema_data":13,"social_meta":74,"head_meta":76,"extra_data":78,"updated_unix":80},105,"en","invisible-galaxies-the-story-of-dark-matter","Invisible Galaxies: The Story of Dark Matter","","以日常母子对话的叙事方式引出暗物质概念，解释暗物质无法直接观测却占宇宙物质约80%。文中通过对比地球物质组成与恒星成分，阐明“看得见的物质（恒星与气体）并不代表宇宙总物质”。进一步从引力效应谈间接探测原理，并以天王星偏离轨道、最终发现海王星的历史案例说明“由可见运动推断不可见天体”的科学路径。",{"@graph":14,"@context":73},[15,34,56],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/technology/","Technology",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/invisible-galaxies-the-story-of-dark-matter/154934/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/invisible-galaxies-the-story-of-dark-matter/154934.png","ImageObject",300,407,{"name":42,"@type":43},"Chloe Bennett","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-10-08","2026-08-28",true,{"@type":52,"interactionType":53,"userInteractionCount":55},"InteractionCounter",{"@type":54},"ViewAction",7,{"@type":57,"mainEntity":58},"FAQPage",[59,65,69],{"name":60,"@type":61,"acceptedAnswer":62},"暗物质为什么“看不见”，却又被认为真实存在？","Question",{"text":63,"@type":64},"暗物质无法直接被看见，但会通过引力影响可见物质，因此能被间接观测到。文中强调暗物质的存在来自其对普通物质的影响。","Answer",{"name":66,"@type":61,"acceptedAnswer":67},"文中用什么方法解释暗物质的间接探测？",{"text":68,"@type":64},"通过“悬挂重画”寻找墙内木龙骨的类比：龙骨看不见，但能通过它对磁铁的拉力感知其位置与存在。暗物质同样通过引力效应被探测。",{"name":70,"@type":61,"acceptedAnswer":71},"天王星轨道异常如何帮助理解暗物质这类不可见成分？",{"text":72,"@type":64},"天王星并未按牛顿定律预测的轨道运行，科学家提出要么存在未知行星，要么牛顿规律不对。最终发现海王星，用可见运动推断不可见对象，从而形成解释思路。","https://schema.org",{"og:url":32,"og:type":75,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":77,"canonical":32},"index,follow",{"doc_id":79,"site_id":7},154934,1787901143,{"code":4,"msg":82,"data":83},"success",[84,88,92,96,101,105,109,114,119,122,126],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":85,"show_sort_weight":86,"slug":87},"Story & Novel",90,"story-novel",{"id":26,"doc_module":4,"doc_module_name":25,"category_name":89,"show_sort_weight":90,"slug":91},"Literature",80,"literature",{"id":33,"doc_module":4,"doc_module_name":25,"category_name":93,"show_sort_weight":94,"slug":95},"Exam",70,"exam",{"id":97,"doc_module":4,"doc_module_name":25,"category_name":98,"show_sort_weight":99,"slug":100},5,"Comic",60,"comic",{"id":102,"doc_module":4,"doc_module_name":25,"category_name":29,"show_sort_weight":103,"slug":104},6,50,"technology",{"id":55,"doc_module":4,"doc_module_name":25,"category_name":106,"show_sort_weight":107,"slug":108},"Healthcare",40,"healthcare",{"id":110,"doc_module":4,"doc_module_name":25,"category_name":111,"show_sort_weight":112,"slug":113},8,"Research & Report",30,"research-report",{"id":115,"doc_module":4,"doc_module_name":25,"category_name":116,"show_sort_weight":117,"slug":118},9,"Religion & Spirituality",20,"religion-spirituality",{"id":117,"doc_module":4,"doc_module_name":25,"category_name":120,"show_sort_weight":117,"slug":121},"World Cup","world-cup",{"id":123,"doc_module":4,"doc_module_name":25,"category_name":124,"show_sort_weight":123,"slug":125},10,"Lifestyle","lifestyle",{"id":127,"doc_module":4,"doc_module_name":25,"category_name":128,"show_sort_weight":97,"slug":129},19,"General","general",{"code":4,"msg":82,"data":131},{"doc_id":79,"user_id":132,"nickname":42,"user_avatar":133,"doc_module":4,"category_id":102,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":55,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":55,"language":139,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":12,"update_tm":80,"read_time":143},962084925782,"https://ap-avatar.wpscdn.com/davatar_9964176cb1d06d4a9deccf72a44ae3dc","No. 72 • Summer 2007 [www.astrosociety.org/uitc](www.astrosociety.org/uitc)  \n© 2007, Astronomical Society of the Pacific 390 Ashton Avenue, San Francisco, CA 94112  \nInvisible Galaxies: The Story of Dark Matter  \nby Matthew Craig and Sara Schultz  \nometimes astronomers need a reality check. The  \nSother evening I was talking to my mother about ~~dark ~~  \nmatter1, and the more I said, the more she looked at me like I was nuts. It started when she asked me about my summer plans. The plans involve dark matter, so the question “What is dark matter?”2 arose almost immediately.  \nI explained that dark matter is this stuff that you cannot see, touch, taste, hear or feel, even with the most sensitive instruments. She looked suspicious. I added that most of the matter in the universe is dark matter3. She looked more suspicious. Getting a little desperate I confidently said the stuff is everywhere, even in our galaxy. Her face said she thought I was off my rocker. Out loud she asked,“How do you know this stuff really exists if you can’t see it? Especially if there is so much of it!”  \nIn this image, dark matter (shown in blue) has become separated from luminous matter (shown in red) in the bullet cluster.  \nImage credit: X-ray: NASA/CXC/CfA/M.Markevitch et al.; Optical: NASA/STScI;  \nMagellan/U.Arizona/D.Clowe et al.; Lensing Map: NASA/STScI; ESO WFI;  \nMagellan/U.Arizona/D.Clowe et al.  \nI realized then how poorly everyday life prepares one for understanding what the universe is made of. The Earth is a really exceptional place. Think about the kinds of things you encounter each day. You breathe air, which is mostly nitrogen and oxygen. You drink water, which is mostly oxygen by weight with some hydrogen. You eat food containing sugars composed of carbon, hydrogen and oxygen. The ground you walk on is composed of relatively heavy elements like silicon, iron and oxygen. It is natural enough to conclude the whole universe must be like this, alot of heavy elements, a bit of hydrogen, and essentially no helium.  \nIt is not.  \nThe things you breathe, eat, and drink on Earth make up less than 1% of the sun. A star, like our sun, is about 75% hydrogen and 24% helium. Every object larger than a planet that we see in the universe is pretty similar to the sun in terms of its composition: mostly hydrogen, some helium, not much else.  \nSo what about this dark matter stuff? Mom thought I was trying to change the subject so she gently reminded me to get to the point.  \nThe point is that just as the materials commonly found on Earth don’t represent what you observe in the sun, the materials that comprise the Sun don’t represent all the matter there is in the universe. When you look at a galaxy the stuff that you see with a telescope is only a relatively small fraction of the stuff that is actually there. The stuff you can see—stars and gas—is made out of the same stuff as the sun; mostly hydrogen, some helium. The stuff you cannot see, called dark matter is...well, it is called dark matter. Nobody knows what it is.  \nAbout 80% of the matter in the universe is dark matter.4 Describing a galaxy by saying it is made out of stars and gas  \nEstimated distribution of dark matter and dark energy in the universe.  \nImage credit: NASA  \nisn’t really accurate, in the same way that saying the sun is made out of helium isn’t really accurate. Sure, there is some helium there, but most of the sun is not helium. Most of a galaxy is not stars and gas, it is dark matter.  \nI was feeling pretty pleased with myself now. This seemed like a mighty fine explanation. Then Mom reminded me I still hadn’t answered the big question: If no one has ever seen this stuff why do grownups (with Ph.D.s no less) believe this stuff exists?  \nThe short answer is that the dark matter that we cannot see pulls, through gravity, on the matter that we can see. We“observe” the dark matter indirectly through the influence it has on ordinary matter.  \nYou experience this sort of indirect detection","cbCaicDvnLJoiEvF","https://ap.wps.com/l/cbCaicDvnLJoiEvF","pdf",1014258,"English","# Invisible Galaxies: The Story of Dark Matter\n## From everyday life to the need for dark matter\n## What dark matter is and how we know it exists\n## Indirect detection through gravity\n## A brief history: Uranus and Neptune","[{\"question\":\"暗物质为什么“看不见”，却又被认为真实存在？\",\"answer\":\"暗物质无法直接被看见，但会通过引力影响可见物质，因此能被间接观测到。文中强调暗物质的存在来自其对普通物质的影响。\"},{\"question\":\"文中用什么方法解释暗物质的间接探测？\",\"answer\":\"通过“悬挂重画”寻找墙内木龙骨的类比：龙骨看不见，但能通过它对磁铁的拉力感知其位置与存在。暗物质同样通过引力效应被探测。\"},{\"question\":\"天王星轨道异常如何帮助理解暗物质这类不可见成分？\",\"answer\":\"天王星并未按牛顿定律预测的轨道运行，科学家提出要么存在未知行星，要么牛顿规律不对。最终发现海王星，用可见运动推断不可见对象，从而形成解释思路。\"}]","Invisible Galaxies: The Story of Dark Matter | PDF",18]