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人类对物质的认识可分为两个层次:一是宏观,二是微观。所谓宏观是指研究的对象尺寸很大,在宏观的时间空间坐标中它的下限是有限的,而上限是无限的。宏观大的物体一般是指天体,例如地球、行星、恒星及银河系,一般把人的肉眼可见的物体称最小物体。随着科学技术的发展、天文观测仪器的出现,人们对宏观物体的认识不断深化,人们对宏观认识的尺度已经延伸到几亿和几十亿光年。在这个基础上,一些科学领域相继建立,如力学、地球物理学、天体物理学、空间科学等。
Human understanding of matter can be divided into two levels: one is macro, the second is micro. The so-called macro refers to the size of the object of the study in the macro-space-time coordinates of its lower limit is limited, and the upper limit is unlimited. Macroscopic objects generally refers to the celestial bodies, such as the Earth, planets, stars and the Milky Way, the general human visible objects that the smallest objects. With the development of science and technology, the appearance of astronomical observation instruments has deepened people’s understanding of macroscopic objects. People’s understanding of macroscopic standards has been extended to hundreds of millions and billions of light years. On this basis, a number of scientific fields have been established, such as mechanics, geophysics, astrophysics, space science and so on.