IBNA - Most Popular Technology and Science :: Full Edition http://www.ibna.ir/en/technology_science Sat, 14 Sep 2019 06:35:26 GMT /skins/default/en/normal3/ch01_newsfeed_logo.gif Iran's Book News Agency (IBNA) http://www.ibna.ir/ 100 70 en All rights reserved,Citing materials is authorized by making reference to IBNA. Sat, 14 Sep 2019 06:35:26 GMT Technology and Science 60 ‎‘The Solar Corona’ provides scientific answers for longstanding questions http://www.ibna.ir/en/doc/tolidi/280652/the-solar-corona-provides-scientific-answers-for-longstanding-questions According to IBNA correspondent, ‘The Solar Corona’ which has been translated into Persian by Marjan Yusefzadeh Shabestari and released by Sefidsar Publishing is introduced: “Observations from the ground and space have advanced our knowledge of the solar corona dramatically over the last three decades. This textbook is the first to present this new understanding at a level appropriate for advanced undergraduate and graduate students, and researchers seeking an entry-point into the research literature. This timely volume presents a lucid and synthesized review of the latest observations of the solar corona and how they have advanced and shaped our understanding of coronal physics. This book provides a much-needed introduction to coronal physics for advanced students and researchers.   The Sun is the star at the center of the Solar System. It is a nearly perfect sphere of hot plasma, with internal convective motion that generates a magnetic field via a dynamo process. It is by far the most important source of energy for life on Earth. Its diameter is about 1.39 million kilometers (864,000 miles), or 109 times that of Earth, and its mass is about 330,000 times that of Earth. It accounts for about 99.86% of the total mass of the Solar System. Roughly three quarters of the Sun's mass consists of hydrogen (~73%); the rest is mostly helium (~25%), with much smaller quantities of heavier elements, including oxygen, carbon, neon, and iron   The Sun is a G-type main-sequence star (G2V) based on its spectral class. As such, it is informally and not completely accurately referred to as a yellow dwarf (its light is closer to white than yellow). It formed approximately 4.6 billion years ago from the gravitational collapse of matter within a region of a large molecular cloud. Most of this matter gathered in the center, whereas the rest flattened into an orbiting disk that became the Solar System. The central mass became so hot and dense that it eventually initiated nuclear fusion in its core. It is thought that almost all stars form by this process. ‘The Solar Corona’ in Persian has been published in 176 pages and 1000 copies.   ]]> Technology and Science Fri, 13 Sep 2019 11:39:04 GMT http://www.ibna.ir/en/doc/tolidi/280652/the-solar-corona-provides-scientific-answers-for-longstanding-questions