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所在平台: Coursera |
课程主页: https://www.coursera.org/learn/big-bang
课程评论：没有评论
课程名称：从大爆炸到暗能量 课程概述：我们最近对宇宙如何在大爆炸后经历了137亿年的演变有了不少了解。宇宙中超过80%的物质是神秘的暗物质，它促成了星星和星系的形成。新发现的希格斯玻色子在大爆炸后的一万亿分之一秒被冻结在宇宙中，为宇宙带来了秩序。然而，我们仍然不知道普通物质（原子）是如何幸存于反物质的彻底湮灭之下的。大约在70亿年前，宇宙的扩张开始加速，而宇宙正在被撕裂，罪魁祸首是神秘的暗能量，这是一种在真空中扩散的神秘能量。我将呈现这些令人震惊的发现背后的证据，并讨论我们在不久的将来可能学到的内容。 课程大纲： 1. **日常生活到大爆炸** - 描述：理解我们所生活的宇宙以及如何探测宇宙，可以从简单的日常生活经验（如昼夜和四季）开始。我们将从这些观察出发，进行一次从我们当地的地球到宇宙边缘再回到宇宙诞生的旅程，学习现代物理学中提供这一理解的技术和发现。 2. **元素的诞生与希格斯玻色子** - 描述：我们由化学元素构成。因此，根本问题“我们来自哪里？”引发了另一个问题：“元素是如何诞生的？”该模块将与希格斯玻色子相关，该粒子在回答此问题时至关重要，其发现直到2012年7月4日才被宣布。在这一模块中，我们将学习这些主题的最新研究成果。 3. **暗物质与反物质** - 描述：在这一模块中，我们将学习关于暗物质和反物质的内容——宇宙中更神秘的部分。我们知道暗物质在星星和星系形成中扮演了重要角色，但其许多特性仍然对我们未知。我们还将探讨宇宙的起源是如何以相等数量的物质和反物质开始，但最终仅有物质（即我们所由构成的）幸存下来的奇特奥秘。 4. **膨胀与暗能量** - 描述：一开始，宇宙在一段被称为宇宙膨胀的时期内经历了指数级扩张。近期的研究表明，宇宙已进入另一个扩张阶段，被认为是由“神秘”的暗能量引起的。在这一模块中，我们将学习关于膨胀、暗能量以及我们宇宙的可能命运。
Name:From Daily Life to the Big Bang
Description:Understanding the Universe in which we live and how to probe it can begin with simple daily life experiences such as night and day and the four seasons. Starting from these observations, we will take a journey from our local Earth at the present time all the way to the edge of the universe and back to its birth, learning the techniques and findings in modern physics that provide us this understanding.
Name:Birth of Elements and Higgs Boson
Description:We are made of chemical elements. So one of the fundamental questions “where do we come from?” leads to another question: “how were elements born?”. This is related to the Higgs Boson, an important particle in answering this question which remained elusive until its discovery was recently announced on July 4, 2012. In this module, we will learn recent research outcomes on these topics.
Name:Dark Matter and Anti-Matter
Description:In this module, we will learn about dark matter and anti-matter -- some of the more mysterious sides of the Universe. We know dark matter played an important role in the formation of stars and galaxies, but much of properties are still unknown to us. In another strange mystery, we will see how the beginning of the universe started with equal amounts of matter and anti-matter, yet somehow only matter (which we are composed of!) survived.
Name:Inflation and Dark Energy
Description:At the very beginning, the Universe exponentially expanded during a period known as the cosmic inflation. Recent studies suggested that the Universe has entered into another stage of expansion, considered to be caused by 'mysterious' dark energy. In this module, we will learn about inflation, dark energy, and the possible fates of our Universe.
We have learned a lot recently about how the Universe evolved in 13.7 billion years since the Big Bang. More than 80% of matter in the Universe is mysterious Dark Matter, which made stars and galaxies to form. The newly discovered Higgs-boson became frozen into the Universe a trillionth of a second after the Big Bang and brought order to the Universe. Yet we still do not know how ordinary matter (atoms) survived against total annihilation by Anti-Matter. The expansion of the Universe started acceleration about 7 billion years ago and the Universe is being ripped apart. The culprit is Dark Energy, a mysterious energy multiplying in vacuum. I will present evidence behind these startling discoveries and discuss what we may learn in the near future. This course is offered in English.
