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从这张由绕地Chandra X射线望远镜所拍摄的照片可见， 接近中心的光点忽隐忽现，并变得非常光明，本现象持续了好几分钟。许多天文学家相信这是黑洞存在于银河系中心的证据之一。(感谢F. Baganoff提供，本图片曾于美国航空暨太空总署网站的每日天文图刊登)
In this image taken by the orbiting Chandra X-ray Observatory, the bright dot near the center was seen to flicker and brighten dramatically for a few minutes. Many astronomers believe this provides additional evidence that a black hole does indeed reside at our Galaxy's center. (Image courtesy of F. Baganoff, MIT as presented on NASA's Astronomy Picture of the Day web site.)
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课程重点
我能看得到黑洞吗？要是能看见，黑洞又会是什么样子的呢？它看起来是黑色的吗？掉进黑洞时又有何感觉呢？8.224 探索黑洞会利用初等微积分研究这类问题。本网页载有作业、考试、课堂讲稿、影片和期末分组专题之说明。
Can I see a black hole at all? If I can see it, what does a black hole look like? Does it look black? What does it feel like to fall toward a black hole? 8.224 Exploring Black Holes investigates these and many other questions using elementary calculus. The website includes assignments, exams, lecture notes, videos, and a description of the end-of-term collaborative research project.
课程描述
透过研究黑洞对附近环境的物理影响，为同学提供了解广义相对论、天体物理学和基础宇宙学的基础。本课程同时会探讨现今有关理论与观测之发展、平面时空中的能量与动量、度规、接近旋转与非旋转吸引中心的弯曲时空、粒子与光线之轨道及宇宙基础模型。每周包括晚间专题课及复习课各一节。最后三分一的学期将用于综合专题研究，例如全球定位系统、相对论的太阳系测试、 堕入黑洞、重力透镜效应、重力波、重力探测器B及进阶宇宙模型等。
Study of physical effects in the vicinity of a black hole as a basis for understanding general relativity, astrophysics, and elements of cosmology. Extension to current developments in theory and observation. Energy and momentum in flat spacetime; the metric; curvature of spacetime near rotating and nonrotating centers of attraction; trajectories and orbits of particles and light; elementary models of the Cosmos. Weekly meetings include an evening seminar and recitation. The last third of the semester is reserved for collaborative research projects on topics such as the Global Positioning System, solar system tests of relativity, descending into a black hole, gravitational lensing, gravitational waves, Gravity Probe B, and more advanced models of the Cosmos.
技术需求
本课程网址所提供的.rm文件必须使用RealOne™ Player software软件执行。可以用来编写及执行.java文件的开发工具已置于本网。若有个别指示或建议，请参考课程资料。本网提供的.zip档须使用文件解压程式如Winzip®或StuffIt®开启，而.class档则须利用Java® Virtual Machine software（已自动安装于大部分主要网页浏览器）执行。
MATLAB® 是MathWorks公司的商标。
RealOne™ 是 RealNetworks公司的商标或注册商标。
StuffIt® 是Aladdin Systems公司的商标。
WinZip® 是 WinZip Computing公司的商标。
Java® 是Sun Microsystems 公司于美国及其他国家的商标或注册商标。
RealOne™ Player software is required to run the .rm files found on this course site. Any number of development tools can be used to compile and run the .java files found on this course site. Please refer to the course materials for any specific instructions or recommendations. File decompression software, such as Winzip® or StuffIt®, is required to open the .zip files found on this course site. Java® Virtual Machine software (automatically installed in most major web browsers) is required to run the .class files found on this course site.
RealOne™ is a trademark or a registered trademark of RealNetworks, Inc.
StuffIt® is a trademark of Aladdin Systems, Inc.
WinZip® is a registered trademark of WinZip Computing, Inc.
Java® is a trademark or registered trademark of Sun Microsystems, Inc. in the United States and other countries.
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讲师：
Edmund Bertschinger 教授
Edwin F. Taylor 教授
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教师授课：
每周1节
每节1.5小时
复习/实习课程：
每周1节
每节1.5小时
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大学部
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原文声明 |
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