Reports on the modeling of star collapse and formation on high-speed computers. Early stages in the formation of a star; Use of increasingly realistic descriptions of the parent clouds; Accuracy and detail of the models of star formation; Astrophysicists' use of realistic pictures of a star's...
These detections establish that benzonitrile is not unique to TMC-1; rather, aromatic chemistry appears to be widespread throughout the earliest stages of star formation, probably persisting at least until the initial formation of a protostar. The abundance of benzonitrile far exceeds predictions from...
Let’s discuss what happens in regions of star formation by considering a nearby site where stars are forming right now. One of the best-studied stellar nurseries is in the constellation of Orion, The Hunter, about 1500 light-years away (Figure 2). The pattern of the hunter is easy to r...
Helium Core Stages Stars are born when a cloud of gas and dust collapses under its own gravity. The temperature of the gas in the cloud then rises, and the cloud fragments into hot cores. These cores contract, and the internal temperature rises until it is high enough to allow hydrogen fu...
The giant molecular cloud G216-2.5, also known as Maddalena’s cloud or the Maddalena-Thaddeus cloud, is distinguished by an unusual combination of high gas mass (1 − 6 × 10 M⊙), low kinetic temperatures (10 K), and the lack of bright far infrared emission. Although star formation...
The Beginning of Planet FormationDirections: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they ...
This thesis presents results of Submillimeter Array (SMA) and Very Large Array (VLA) studies of massive star formation regions in the early stages of ionization, as well as an analysis of numerical simulations of the evolution of these young HII regions. The results favor a picture in which ...
Star Formation Rate refers to the rate at which stars are formed from giant gas clouds in a galaxy. It is measured in Solar masses per year per unit area of the galactic disk, indicating the intensity of star formation in a specific region. ...
holes, in light of recent results of stellar evolution models, and of numerical simulations of the early stages of galaxy formation. Furthermore, we discuss the role of the cosmic radiation produced by the early generation of stars and black holes at high redshift in the process of re...
文中提到One possibility is that a supernova occurred close to the cloud that became the Sun just before the Sun formed; it is even possible that the blast wave from this explosion triggered the collapse of the gas cloud that became the Sun and solar system.（在太阳形成之前，一颗超新星出现...