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How Big Is The Universe
 
How Big is the Universe?
How Big is the Universe?
Marie and Leo are walking on the beach with their Dad, when Marie has a burning question in regards to our Sun and the Universe. While the book is a cute story, it also awakens the curiosity of the children in the Universe, and how big and vast it really is.



How Big is Big and How Small is Small: The Sizes of Everything and Why
How Big is Big and How Small is Small: The Sizes of Everything and Why
This book is about how big is the universe and how small are quarks, and what are the sizes of dozens of things between these two extremes. It describes the sizes of atoms and planets, quarks and galaxies, cells and sequoias. It is a romp through forty-five orders of magnitude from the smallest sub-nuclear particles we have measured, to the edge of the observed universe. It also looks at time, from the epic age of the cosmos to the fleeting lifetimes of ethereal particles. It is a narrative that trips its way from stellar magnitudes to the clocks on GPS satellites, from the nearly logarithmic scales of a piano keyboard through a system of numbers invented by Archimedes and on to the measurement of the size of an atom.Why do some things happen at certain scales? Why are cells a hundred thousandths of a meter across? Why are stars never smaller than about 100 million meters in diameter? Why are trees limited to about 120 meters in height? Why are planets spherical, but asteroids not? Often the size of an object is determined by something simple but quite unexpected. The size of a cell and a star depend in part on the ratio of surface area to volume. The divide between the size of a spherical planet and an irregular asteroid is the balance point between the gravitational forces and the chemical forces in nature.Most importantly, with a very few basic principles, it all makes sense. The world really is a most reasonable place.

$26.72
-$15.23(-36%)



How Old Is the Universe?
How Old Is the Universe?
Astronomers have determined that our universe is 13.7 billion years old. How exactly did they come to this precise conclusion? How Old Is the Universe? tells the incredible story of how astronomers solved one of the most compelling mysteries in science and, along the way, introduces readers to fundamental concepts and cutting-edge advances in modern astronomy. The age of our universe poses a deceptively simple question, and its answer carries profound implications for science, religion, and philosophy. David Weintraub traces the centuries-old quest by astronomers to fathom the secrets of the nighttime sky. Describing the achievements of the visionaries whose discoveries collectively unveiled a fundamental mystery, he shows how many independent lines of inquiry and much painstakingly gathered evidence, when fitted together like pieces in a cosmic puzzle, led to the long-sought answer. Astronomers don't believe the universe is 13.7 billion years old--they know it. You will too after reading this book. By focusing on one of the most crucial questions about the universe and challenging readers to understand the answer, Weintraub familiarizes readers with the ideas and phenomena at the heart of modern astronomy, including red giants and white dwarfs, cepheid variable stars and supernovae, clusters of galaxies, gravitational lensing, dark matter, dark energy and the accelerating universe--and much more. Offering a unique historical approach to astronomy, How Old Is the Universe? sheds light on the inner workings of scientific inquiry and reveals how astronomers grapple with deep questions about the physical nature of our universe.

$11.64
-$18.31(-61%)



Is a Blue Whale the Biggest Thing There Is? (Wells of Knowledge Science Series)
Is a Blue Whale the Biggest Thing There Is? (Wells of Knowledge Science Series)
The blue whale is the biggest creature on Earth. But a hollow Mount Everest could hold billions of whales! And though Mount Everest is enormous, it is pretty small compared to the Earth. This book is an innovative exploration of size and proportion.

$3.48
-$4.51(-56%)



A Universe from Nothing: Why There Is Something Rather than Nothing
A Universe from Nothing: Why There Is Something Rather than Nothing
Bestselling author and acclaimed physicist Lawrence Krauss offers a paradigm-shifting view of how everything that exists came to be in the first place.“Where did the universe come from? What was there before it? What will the future bring? And finally, why is there something rather than nothing?”One of the few prominent scientists today to have crossed the chasm between science and popular culture, Krauss describes the staggeringly beautiful experimental observations and mind-bending new theories that demonstrate not only can something arise from nothing, something will always arise from nothing. With a new preface about the significance of the discovery of the Higgs particle, A Universe from Nothing uses Krauss’s characteristic wry humor and wonderfully clear explanations to take us back to the beginning of the beginning, presenting the most recent evidence for how our universe evolved—and the implications for how it’s going to end. Provocative, challenging, and delightfully readable, this is a game-changing look at the most basic underpinning of existence and a powerful antidote to outmoded philosophical, religious, and scientific thinking.

$7.40
-$8.60(-54%)



How Big Is Our Universe? Mathematical Analogies
How Big Is Our Universe? Mathematical Analogies
Ever wondered how big our universe is? Dr. Anwar Hamdi, one of the greatest thinkers of our time, uses accurate mathematical analogies to make the astronomical sizes of the universe graspable. Find the shocking facts: •More than 400 trillion Khufu pyramids can fit inside planet Earth •Our Earth orbits the sun at a speed 60 times faster than a bullet •Our solar system is 23 times faster than the speed of an F-15 fighter jet •It would take more than 19 centuries to count the stars in our galaxy •The sun gives humanity 22,000 times its energy need •A day is longer than a year on the planet of love •A planet that can float on water ----- Enjoy the engaging topics: •The cockroach and the jet •Earth's stamp on the Jupiter envelope •Toy ship in the Nile •A lentils-stuffed watermelon •The entire human race fails to lift one drop of water •And much more…

$2.65
-$2.84(-52%)



Digital Humanitarians: How Big Data Is Changing the Face of Humanitarian Response
Digital Humanitarians: How Big Data Is Changing the Face of Humanitarian Response
The overflow of information generated during disasters can be as paralyzing to humanitarian response as the lack of information. Making sense of this information--Big Data--is proving an impossible challenge for traditional humanitarian organizations, which is precisely why they're turning to Digital Humanitarians. This new humanitarians mobilize online to make sense of vast volumes of data--social media and text messages; satellite and aerial imagery--in direct support of relief efforts worldwide. How? They craft ingenious crowdsourcing solutions with trail-blazing insights from artificial intelligence. This book charts the spectacular rise of Digital Humanitarians, highlighting how their humanity coupled with innovative Big Data solutions is changing humanitarian relief for forever.Praise for the book: ... examines how new uses of technology and vast quantities of digital data are transforming the way societies prepare for, respond to, cope with, and ultimately understand humanitarian disasters. --Dr. Enzo Bollettino, Executive Director, The Harvard Humanitarian Initiative, Harvard University ... explains the strengths and potential weaknesses of using big data and crowdsourced analytics in crisis situations. It is at once a deeply personal and intellectually satisfying book.--Professor Steven Livingston, Professor of Media & Public and International Affairs, Elliott School of International Affairs, George Washington University

$34.55
-$16.40(-32%)





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