Science Current Events | Science News | Brightsurf.com
 

New findings on the birth of the solar system

July 20, 2009
A team of international astrophysicists, including Dr Maria Lugaro from Monash University, has discovered a new explanation for the early composition of our solar system.

The team has found that radioactive nuclei found in the earliest meteorites, dating back billions of years, could have been delivered by a nearby dying giant star of six times the mass of the sun.

Dr Lugaro said the findings could change our current ideas on the origin of the solar system.

"We have known about the early presence of these radioactive nuclei in meteorites since the 1960s, but we do not know where they originated from. The presence of the radioactive nuclei has been previously linked to a nearby supernova explosion, but we are showing now that these nuclei are more compatible with an origin from the winds coming from a large dying star," Dr Lugaro said.

The conclusion was reached by combining stellar observations from telescopes with recently developed theoretical models reproduced on powerful computers of how stars evolve and which nuclear reaction occurs within their interiors.

"We need to know if the presence of radioactive nuclei in young planetary systems is a common or a special event in our galaxy because their presence affected the evolution of the first large rocks (the parent bodies of asteroids and meteorites) in the solar system. These are believed to be the source of much of earth's water, which is essential for life," Dr Lugaro said.

"Within one million years of the formation of the solar system the radioactive nuclei decayed inside the rocks where they were trapped, releasing high-energy photons, which caused the rocks to heat. Since much of earth's water is believed to have originated from these first rocks, the possibility of life on earth depends on their heating history and, in turn, on the presence of radioactive nuclei." Dr Lugaro said.

"What we need to do now is investigate the probability that a dying giant star could have actually been nearby our then young solar system and polluted it with radioactive nuclei. This will inform us on the place where the solar system was born, on the probability that other young planetary system also are polluted with radioactive nuclei, and, eventually, on the probability of having water on terrestrial planets in other planetary systems."

Monash University


Related Radioactive Nuclei Current Events and Radioactive Nuclei News Articles


Step closer to birth of the sun
Published in Science, the team led by Dr Maria Lugaro and Professor Alexander Heger, from Monash University, have investigated the solar system's prehistoric phase and the events that led to the birth of the sun.

Evidence for a new nuclear 'magic number'
Researchers have come one step closer to understanding unstable atomic nuclei. A team of researchers from RIKEN, the University of Tokyo and other institutions in Japan and Italy has provided evidence for a new nuclear magic number in the unstable, radioactive calcium isotope 54Ca.

Scientists demonstrate pear shaped atomic nuclei
Scientists at the University of Liverpool have shown that some atomic nuclei can assume the shape of a pear which contributes to our understanding of nuclear structure and the underlying fundamental interactions.

Direct measurements allow detailed look at how quarks of different flavors contribute to spin
Scientists hoping to unravel the mystery of proton spin at the Relativistic Heavy Ion Collider (RHIC), a 2.4-mile-circumference particle accelerator at the U.S. Department of Energy's (DOE) Brookhaven National Laboratory, have a new tool at their disposal - the first to directly explore how quarks of different types, or "flavors," contribute to the overall spin of the proton.

New 'doubly magic' research reveals role of nuclear shell
Researchers at the Department of Energy's Oak Ridge National Laboratory (ORNL), the University of Tennessee (UT) and six collaborating universities have performed an unprecedented nuclear reaction experiment that explores the unique properties of the "doubly magic" radioactive isotope of 132Sn, or tin-132.

Theoretical nuclear physics in China
In recent years several Large-Scale Scientific Facilities (LSSF) for nuclear, hadronic, and particle physics have been upgraded and constructed in China.

Listening to dark matter
A team of researchers in Canada have made a bold stride in the struggle to detect dark matter. The PICASSO collaboration has documented the discovery of a significant difference between the acoustic signals induced by neutrons and alpha particles in a detector based on superheated liquids.

Star light, star bright: FSU facility duplicating conditions of supernovas
How is matter created? What happens when stars die? Is the universe shrinking, or is it expanding? For decades, scientists have been looking for answers to such "big picture" questions.

Little earth
Arts/science video installation to open in London (January) and Scotland (February).
More Radioactive Nuclei Current Events and Radioactive Nuclei News Articles

Quantum Physics of Atoms, Molecules, Solids, Nuclei, and Particles

Quantum Physics of Atoms, Molecules, Solids, Nuclei, and Particles
by Robert Eisberg (Author), Robert Resnick (Author)


A revision of a successful junior/senior level text, this introduction to elementary quantum mechanics clearly explains the properties of the most important quantum systems. Emphasizes the applications of theory, and contains new material on particle physics, electron-positron annihilation in solids and the Mossbauer effect. Includes new appendices on such topics as crystallography, Fourier Integral Description of a Wave Group, and Time-Independent Perturbation Theory.

Particles and Nuclei: An Introduction to the Physical Concepts

Particles and Nuclei: An Introduction to the Physical Concepts
by Bogdan Povh (Author), Klaus Rith (Author), Christoph Scholz (Author), Frank Zetsche (Author), Martin Lavelle (Translator)


To cope with modern developments, especially in nuclear physics research, this textbook presents nuclear and particle physics from a unifying point of view. The first part, Analysis, is devoted to disentangling the substructure of matter. The second part, Synthesis, shows how the elementary particles may be combined to build hadrons and nuclei. A section on neutrino oscillations and one on nuclear matter at high temperatures bridge the field of "nuclear and particle physics" and "modern astrophysics and cosmology". New developments are also covered. This concise text has become a standard reference for advanced and undergraduate courses.

A Brief History of Time

A Brief History of Time
by Stephen Hawking (Author)


#1 NEW YORK TIMES BESTSELLER

A landmark volume in science writing by one of the great minds of our time, Stephen Hawking’s book explores such profound questions as: How did the universe begin—and what made its start possible? Does time always flow forward? Is the universe unending—or are there boundaries? Are there other dimensions in space? What will happen when it all ends?

Told in language we all can understand, A Brief History of Time plunges into the exotic realms of black holes and quarks, of antimatter and “arrows of time,” of the big bang and a bigger God—where the possibilities are wondrous and unexpected. With exciting images and profound imagination, Stephen Hawking brings us closer to the ultimate secrets at the very heart of...

Chemistry

Chemistry
by Steven S. Zumdahl (Author), Susan A. Zumdahl (Author)


This fully updated Ninth Edition of Steven and Susan Zumdahl's CHEMISTRY brings together the solid pedagogy, easy-to-use media, and interactive exercises that today's instructors need for their general chemistry course. Rather than focusing on rote memorization, CHEMISTRY uses a thoughtful approach built on problem-solving. For the Ninth Edition, the authors have added a new emphasis on critical systematic problem solving, new critical thinking questions, and new computer-based interactive examples to help students learn how to approach and solve chemical problems--to learn to think like chemists--so that they can apply the process of problem solving to all aspects of their lives. Students are provided with the tools to become critical thinkers: to ask questions, to apply rules and...

Physics, 9th Edition

Physics, 9th Edition
by John D. Cutnell (Author), Kenneth W. Johnson (Author)


Cutnell and Johnson has been the #1 text in the algebra-based physics market for almost 20 years. PHYSICS 9e continues that tradition by providing superior support students need to facilitate a deeper level of conceptual understanding, improve their reasoning skills and see the relevance of physics to their lives and future careers.Research studies have shown that there is a strong correlation between time on task and student learning gains. PHYSICS 9e with WileyPLUS offers instructors innovative new tools for engaging students. Through the use of a proven pedagogy that includes integrated reading activities, instructors are able to much more effectively monitor student reading and progress, resulting in a higher level of student engagement with the course content.Success in physics is...

Pathophysiology: The Biologic Basis for Disease in Adults and Children, 6th Edition

Pathophysiology: The Biologic Basis for Disease in Adults and Children, 6th Edition
by Kathryn L. McCance (Editor), Sue E. Huether (Editor), Valentina L. Brashers (Editor), Neal S. Rote (Editor)


Well-known for its authoritative and comprehensive coverage, complete treatment of pediatric pathophysiology, and the most extensive illustration program in its field, this textbook features expert content on everything from the general principles of pathophysiology to detailed discussions of genetics and specific diseases. Chapters on alteration present the pathophysiology, clinical manifestations, and evaluation and treatment of each disease to help you learn to identify normal anatomy and physiology, as well as alterations of function in adults and in children.Unparalleled coverage of disease processes makes this text the most comprehensive pathophysiology text available. The largest full-color art program in the field illustrates the clinical manifestations of diseases and disease...

Fundamentals of Biochemistry: Life at the Molecular Level

Fundamentals of Biochemistry: Life at the Molecular Level
by Donald Voet (Author), Judith G. Voet (Author), Charlotte W. Pratt (Author)


Voet and Pratt's 4th edition of Principles of Biochemistry, challenges readers to better understand the chemistry behind the biological structure and reactions occurring in living systems. The latest edition continues this tradition, and additionally incorporates coverage of recent research and an expanded focus on preparing and supporting students throughout the course. With the addition of new conceptual assessment content to WileyPLUS, providing the opportunity to assess conceptual understanding of key introductory biochemistry concepts and retrain themselves on their misconceptions

Environment

Environment
by Peter H. Raven (Author), David M. Hassenzahl (Author), Linda R. Berg (Author)


The 8th Edition of Environment builds on the previous comprehensive, systems-based environmental science issue with more in-depth information on systems approach, which emphasizes the interconnected nature of environmental science throughout the text. The book is even more reader-friendly integrated learning system designed to help move from general concepts to specific applications and continues to focus on currency. It presents the basic facts, various perspectives on issues, and framework to help readers reach their own informed decisions in a changing marketplace.

Essentials Of Environmental Health, 2nd Edition (Essential Public Health)

Essentials Of Environmental Health, 2nd Edition (Essential Public Health)
by Robert H. Friis (Author)


Given the success and positive reviews of the first edition, Friis has kept in tact the features that work well. The author has instead focused on completing a thorough update of tables, figures and data. Major updates: • New chapter (Chapter 14) on injuries • All Web-based sources updated throughout to include the most recent information • Expanded discussion of the history of environmental health, e.g., contributions of John Snow, Lemuel Shattuck, and Walter Reed • New case study on pandemic influenza (H1N1) 2009 • Coverage of recent environmental controversies, such as use of bisphenol A in plastics This best-selling offering from the APHA/Jones & Bartlett Learning Essential Public Health series is a clear and comprehensive study of the major topics of environmental health,...

Barron's AP Chemistry, 7th Edition

Barron's AP Chemistry, 7th Edition
by Neil D. Jespersen (Author)


Updated to reflect the brand new AP Chemistry exam that will be administered for the first time in May 2014, this manual includes:

Six practice AP exams: three diagnostic tests and three full-length practice exams that are aligned with the upcoming, new AP Chemistry examAll questions answered and explainedA comprehensive subject review covering the structure of matter, chemical bonding, states of matter, physical chemistry, chemical reactions, and all other test topicsStudy tips and test-taking strategies

The manual can be purchased alone or with an optional CD-ROM that presents two additional full-length practice tests with automatic scoring and fully explained answers.







System Requirements:





Microsoft® Windows®:...

© 2014 BrightSurf.com