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图书The Origin of the Stars and the Causes of Their Motions and Their Light 介绍、书评、论坛及推荐
The origin of stars. (poem)Lieberman, Laurence
All of these events (possibly with the exception of X-ray bursts) eject material with an abundance composition unique to the specific event and lead over time to the evolution of elemental (and isotopic) abundances in the galactic gas and their imprint on the next generation of stars. In ...
The modern theory of stellar evolution leads to several possible scenaria for the formation of many types of hydrogen deficient (usually helium rich) stars. Some of these scenaria are briefly discussed in this paper to provide possible explanations for origins of R Cr B, hot helium and Wolf- ...
We discuss in this contribution constraints on the origin of mass-loss from young stars brought by recent observations at high angular resolution (0.1″ = 14 AU) of the inner regions of winds from T Tauri stars. Jet widths and collimation scales, the large extent of the velocity profile as...
Yellow chuckled:“The sun is yellow,the moon is yellow,the stars are yellow.Every time you look at a sunflower,the whole world starts to smile. Without me there would be no fun.”黄色暗自笑道:“太阳是黄色的,月亮是黄的,星星也是黄色的。每次你看着向日葵,整个世界也开始笑起来。没有我,那...
Within the distance of 1 pc from the Galactic center (GC), more than 100 young massive stars have been found. The massive stars at 0.1-1 pc from the GC are located in one or two disks, while those within 0.1 pc from the GC, S-stars, have an isotropic distribution. How these stars...
By this time the once vast cloud had assumed a flat disk shape with a large concentration of material at its center, called the protosun (pre-Sun). Astronomers are fairly confident that the nebular cloud formed a disk because similar structures have been detected around other stars. 2. ...
BEIJING, Oct. 28 (Xinhua) -- Chinese scientists have revealed the origin of calcium in first stars by using the world's deepest underground laboratory in southwest China's Sichuan Province, according to a study published online Wednesday in the journal Nature. ...