| タイトル | Theory of Planetary System Formation |
| 著者（英） | Cassen, Patrick |
| 著者所属（英） | NASA Ames Research Center |
| 発行日 | 1996-12-01 |
| 言語 | eng |
| 内容記述 | Observations and theoretical considerations support the idea that the Solar System formed by the collapse of tenuous interstellar matter to a disk of gas and dust (the primitive solar nebula), from which the Sun and other components separated under the action of dissipative forces and by the coagulation of solid material. Thus, planets are understood to be contemporaneous byproducts of star formation. Because the circumstellar disks of new stars are easier to observe than mature planetary systems, the possibility arises that the nature and variety of planets might be studied from observations of the conditions of their birth. A useful theory of planetary system formation would therefore relate the properties of circumstellar disks both to the initial conditions of star formation and to the consequent properties of planets to those of the disk. Although the broad outlines of such a theory are in place, many aspects are either untested, controversial, or otherwise unresolved; even the degree to which such a comprehensive theory is possible remains unknown. |
| NASA分類 | Astrophysics |
| レポートNO | 97N24950 |
| 権利 | No Copyright |
|
