Product Description
Cutting-edge astrophysics that builds on Einstein's theories to find the unseen matter that fills the Universe. Dark energy. Dark matter. These strange and invisible substances don't just sound mysterious: their unexpected appearance in the cosmic census is upending long-held notions about the nature of the Universe. Astronomers have long known that the Universe is expanding, but everything they could see indicated that gravity should be slowing this spread. Instead, it appears that the Universe is accelerating its expansion and that something stronger than gravity--dark energy--is at work. In Einstein's Telescope Evalyn Gates, a University of Chicago astrophysicist, transports us to the edge of contemporary science to explore the revolutionary tool that unlocks the secrets of these little-understood cosmic constituents. Based on Einstein's theory of general relativity, gravitational lensing, or "Einstein's Telescope," is enabling new discoveries that are taking us toward the next revolution in scientific thinking--one that may change forever our notions of where the Universe came from and where it is going. 8 pages of color; 40 black-and-white illustrations.

CUSTOMER REVIEWS (Average Customer Rating: 4.5 based on 13 reviews)

Wonderful by Tim K (Chicago, IL USA)

5 Stars
October 24, 2009
"Einsteins Telescope" is excellent! Gates explains how we know dark matter and dark energy exist, and what we are doing to understand their mysterious nature. This was a very entertaining book, filled with a lot of good information. I would recommend this to anyone interested in modern cosmology, especially those who want to know more about dark matter and dark energy.

Outstanding popularization by Jerome Beck (Santa Rosa, CA , USA)

5 Stars
October 08, 2009
As others have written this is an outstanding popular treatment of cosmology as of late 2008. If you are interested in the cosmos you you live you will enjoy this book. Also worth reading in a different vein is: "Death From the Skies."

Cosmos exploration by Electric Pen

4 Stars
September 20, 2009
Evalyn Gates has done a superb job of explaining the "how" of current cosmos research. My background is Hollywood journalism, not science writing, but Evalyn Gates pulls galaxies into my living room with plain English and humor. Like Hawking, Geeene and Randall, she makes the current frontier understandable. Howard Williams

Don't be a WIMP!! Discover how astronomers find things they can't see! by Stephen Pletko (London, Ontario, Canada)

5 Stars
August 04, 2009
XXXXX "What we have learned [about our Universe] is amazing. The Universe is 13.7 billion years old, it has a temperature of just under 3 degrees above absolute zero, and its spatial geometry is flat. The enormous expanse of space that we can see today, filled with hundreds of billions of galaxies, began as an intensely hot, almost infinitely dense soup of energy that has expanded and cooled since the beginning of time and space. Space itself is expanding in a great cosmic stretch that has recently begun to kick up a notch--the Universe is accelerating. And it is dark. The cosmic inventory is dominated by dark energy (72%) and dark matter (23%) [both of which we can't see]; normal matter, which comprises everything we [can see and] have ever been able to hold in our hands or examine with our instruments, comes in a distant third, contributing only about 5% of everything that is." The above comes from the epilogue of this well-written, very informative book by Dr. Evalyn Gates, Assistant Director of the Kavli Institute for Cosmological Physics and a Senior Research Associate at the University of Chicago. So what is this book about? As might be deduced from the above quotation, it's about the dark side of the Universe--dark matter, dark energy, even black holes. Dark matter is the hypothetical matter that holds the galaxies together. WIMPs (Weakly Interacting Massive Particle), mentioned in this review's title, are one of the leading candidates for a type of dark matter. Dark energy is the hypothetical form of energy that permeates all of space and tends to increase the rate of expansion of the Universe. (A black hole in general relativity is a region of space in which the gravitational pull is so powerful that nothing, including light, can escape its pull. Black holes can't be seen directly.) As mentioned, dark matter and dark energy can't be seen. How are astronomers to look for these things they can't see? That's where "Einstein's telescope" comes in. Technically, Einstein's telescope is called "gravitational lensing." This book explains how it works. (Note that gravitational lensing is one of the predictions of physicist Albert Einstein's Theory of General Relativity.) Einstein's telescope or gravitational lensing can be used to solve the biggest mysteries of the Universe by using ordinary luminous matter to discover dark matter and its distribution (as well as other dark objects such as black holes and objects too far away to be seen by our best telescopes such as other Earths). This discovered dark matter itself can be used to probe for the imprint of dark energy (and the very structure of space and time). The final chapter is a fantastic discussion of "gravity waves" (or gravitational waves). A gravity wave is a fluctuation in the curvature of space-time which propagates as a wave, traveling outward from the source. Predicted again from Einstein's Theory of General Relativity. This book is quite accessible. No prior knowledge of science of any kind is assumed. Those with a science background will find that the first three chapters cover familiar ground. Throughout the book are helpful black and white illustrations (pictures, graphs, etc.). As a bonus, there is a section of ten beautiful full-color photographs. Finally, my only minor problem with this book is that I would have appreciated in having all new terms introduced in the main narrative listed (with definitions) in a glossary. In conclusion, this is an extraordinary and captivating book!! And don't worry! You don't have to be MACHO to read it. (MACHO stands for Massive Astrophysical Compact Halo Object.) (first published 2009; preface; acknowledgements; glossary of acronyms; 12 chapters; epilogue; main narrative 270 pages; notes; illustration acknowledgments; index; about the author) XXXXX

Einsteins Rings by Golden Lion (North Ogden, Ut United States)

5 Stars
June 10, 2009
1. Einstein predicted that Space and time were affected by matter and energy. 2. Light travels slower through strong gravity and bends around mass 3. A Einstein ring was identifyed between a stellar mass called Haydes and a quaster, six billion light years away, an amazing feat. The quaster was on both sides of the ring. Trillions of stars in the cluster and massive amounts of black matter formed the ring. There are six know Einstein rings. 4. The space time lens can be spherical or eliptical in shape and magnifies light four or five times. 5. Light arrives at the same time from the viewers frame, but varies for the frame of moving at different speeds. 6. Gravity and acceleration are equivalent 7. The short distance between to points in the time space curvature is not a start line. 8. The Elicipse of the sun and light bending measurements verified that the Sun gravity bended light by curving space time and push Einstein into fame. 9. 73 percent of the Universe is dark matter and 21 percent is dark matter and 4 percent is matter by the element chart. 10. Dark energy occurred in the last 1 billion years and it causing the expansion of the cosmos. At twice the distance the cosmos is speeding up at twice the velocity. Dark Energy is creating an antigravity affect. 11. Dark matter emits no light. It can only be determined by gravitational effects, a fingerprint. 12. The Einstein telescope is using gravitational lens to see other parts of the Universe not previously visible or too faint to be seen. The light is distort like looking at an object through the bottom of a wine glass. 13. Gravity reigned supreme in the early part of the Universe. Gravity alone explained the clustering of stellar masses in the early stages. 14. Gates is using gravitational lens to search for Massive Astrophysical Compact Halo Objects (MACHOs) within the halo of the Milky Way galaxy.

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