The Invisible Universe: Dark Matter and Dark Energy (Lecture Notes in Physics, Band 720) ebooks

Dark Energy, Dark Matter / Science Mission Directorate ~ What is dark energy? More is unknown than is known — we know how much there is, and we know some of its properties; other than that, dark energy is a mystery — but an important one. Roughly 70% of the Universe is made of dark energy. Dark matter makes up about 25%. The rest - everything on Earth, everything ever observed with all of our instruments, all normal matter adds up to less than 5 .

What Is Dark Matter? / NASA ~ The invisible matter that we can't detect is called "dark matter." The Swiss astronomer Fritz Zwicky first used the term "dark matter" in the 1930s. He studied the so-called Coma galaxy cluster and, specifically, how fast it revolves. Clusters are like merry-go-rounds: Their speed of revolution depends on the weight and position of the objects in the clusters, like the weight of the objects .

Sean Carroll – Preposterous Universe ~ Dark Matter, Dark Energy (course) Audio/Video Menu Toggle. Videos; Audio/Interviews; Blog ; Calendar; Contact; I'm interested in how the world works at the deepest levels, which leads me to do research in physics and philosophy. My current interests include quantum mechanics, gravitation, cosmology, statistical mechanics, and foundations of physics, with occasional dabblings elsewhere. My most .

Digital - Kölner Stadt-Anzeiger ~ AboShop - Kölner Stadt-Anzeiger. Amsterdamer Str. 192, 50735 Köln / Tel. +49 221 / 92 58 64 20. Amtsgericht Köln, HRA 25393

The Universe: Big Bang to Now in 10 Easy Steps / Space ~ Dark matter is thought to make up 23 percent of the universe. In comparison, only 4 percent of the universe is composed of regular matter, which encompasses stars, planets and people.

5 Lecture 5: Solutions of Friedmann Equations ~ 5 Lecture 5: Solutions of Friedmann Equations “A man gazing at the stars is proverbially at the mercy of the puddles in the road.” Alexander Smith The Big Picture: Last time we derived Friedmann equations — a closed set of solutions of Einstein’s equations which relate the scale factor a(t), energy density ρ and the pressure P for ïŹ‚at, open and closed Universe (as denoted by .

The Friedmann Equations ~ (Dark energy) ‱ More convenient to use the ratio of the density to the critical density ‱ Îș/ R 0 = 0 gives the critical density ‱ The density parameter Ω ultimately governs whether the curvature is: – negative (Ω < 1) – positive (Ω > 1) – flat (Ω = 1) Rewriting the Friedmann equation in integral form . Part III Analytic and numerical solutions to the Friedmann equation .

7 Surprising Things About the Universe / Space ~ From its expansion and acceleration to dark matter and energy, the universe continues to surprise astronomers. Here are some of the most surprising and interesting facts about the universe we live in.

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matter / Definition, Characteristics, States, Examples ~ Matter, material substance that constitutes the observable universe and, together with energy, forms the basis of all objective phenomena. At the most fundamental level, matter is composed of elementary particles, known as quarks and leptons (the class of elementary particles that includes electrons).

How Did the Universe Begin? / Live Science ~ What is dark matter, dark energy, . including dark matter, dark energy and why the universe appears to be expanding at an ever-accelerating clip. The 18 Biggest Unsolved Mysteries in Physics .

Physics Today ~ In his spare time he studied at Leiden University, and in 1873 he received his doctorate in physics after developing an equation of state to describe liquids and gases. Van der Waals's thesis established him as the leader in the study of thermodynamics. He also adapted the ideal gas law to accommodate molecules and intermolecular forces—before anyone had definitively proven that molecules .

Quantum Mechanics Made Simple: Lecture Notes ~ where I feel the book to be incomplete, I supplement them with my lecture notes. I try to reach into rst principles as much as I could with these lecture notes. The only background needed for reading these notes is a background in undergraduate wave physics, and linear algebra.

Roos, M: Introduction to Cosmology: : Roos, Matts ~ Dark matter is discussed on galaxy and cluster scales, and dark matter candidates are presented, some requiring a five-dimensional universe and several representing various types of exotica. In the context of cosmic structures the cold dark matter paradigm is described. Dark energy models include the cosmological constant, quintessence and other single field models, f(R) models and models .

Introduction to the Electromagnetic Spectrum / Science ~ Electromagnetic energy travels in waves and spans a broad spectrum from very long radio waves to very short gamma rays. The human eye can only detect only a small portion of this spectrum called visible light. A radio detects a different portion of the spectrum, and an x-ray machine uses yet another portion. NASA's scientific instruments use the full range of the electromagnetic spectrum to .

Lecture Notes on General Relativity – Sean Carroll ~ This set of lecture notes on general relativity has been expanded into a textbook, Spacetime and Geometry: An Introduction to General Relativity, available for purchase online or at finer bookstores everywhere.About 50% of the book is completely new; I've also polished and improved many of the explanations, and made the organization more flexible and user-friendly.

The Accidental Universe: The World You Thought You Knew ~ “Lightman is one of the few physicists who can name-check the Dalai Lama, astronomer Henrietta Leavitt, Dostoevsky, and dark energy in the same work, while deftly guiding readers through discussions of modern physics and philosophy. Here he has composed a thoughtful, straightforward collection of essays that invite readers to think deeply about the world around them.”

Particle Astrophysics, Second Edition Oxford Master Series ~ Particle Astrophysics, Second Edition (Oxford Master Series in Physics, Band 10) / Donald H. Perkins / ISBN: 9780199545452 / Kostenloser Versand fĂŒr alle BĂŒcher mit Versand und Verkauf duch .

The Accidental Universe: The World You Thought You Knew ~ “Lightman is one of the few physicists who can name-check the Dalai Lama, astronomer Henrietta Leavitt, Dostoevsky, and dark energy in the same work, while deftly guiding readers through discussions of modern physics and philosophy. Here he has composed a thoughtful, straightforward collection of essays that invite readers to think deeply about the world around them.” —

Relativity, Gravitation and Cosmology: A Basic ~ With the latest developments in cosmology, ie, dark flow, dark energy, dark matter, I finally couldn't suppress my curiosity any longer. The framework for understanding cosmology is GR. I own the other GR books by Hartle, Schutz and Carroll. Each of them is more a textbook to accompany a lecture course than one for the self-taught.

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