THE OORT CLOUD

被引：67
作者：
WEISSMAN, PR
机构：
[1] Earth and Space Sciences Division, Jet Propulsion Laboratory, Pasadena, CA 91109
来源：
NATURE | 1990年 / 344卷 / 6269期
关键词：
D O I：
10.1038/344825a0
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Although the outermost planet, Pluto, is 6×l09km from the Sun, the Sun's gravitational sphere of influence extends much further, out to ∼2×1013 km. This space is occupied by the Oort cloud, comprising 1012×1013 cometary nuclei, formed in the primordial solar nebula. Observations and computer modelling have contributed to a detailed understanding of the structure and dynamics of the cloud, which is thought to be the source of the long-period comets and possibly comet showers. © 1990 Nature Publishing Group.
引用
收藏
页码：825 / 830
页数：6
相关论文
共 76 条
[1]  
Allen C.W., 1973, ASTROPHYSICAL QUANTI
[2]  
ANTONOV VA, 1972, MOTION EVOLUTION ORB, P341
[3]   SELF-CONSISTENT DETERMINATIONS OF THE TOTAL AMOUNT OF MATTER NEAR THE SUN [J].
BAHCALL, JN .
ASTROPHYSICAL JOURNAL, 1984, 276 (01) :169-181
[4]  
BAILEY ME, 1988, MON NOT R ASTRON SOC, V235, P1
[5]   THE FORMATION OF COMETS IN WIND-DRIVEN SHELLS AROUND PROTOSTARS [J].
BAILEY, ME .
ICARUS, 1987, 69 (01) :70-82
[6]  
BAILEY ME, 1986, MON NOT R ASTRON SOC, V218, P1
[7]  
BAILEY ME, 1983, NATURE, V303, P399
[8]   ORIGIN OF COMETARY NUCLEI IN PRE-SOLAR NEBULA [J].
BIERMANN, L ;
MICHEL, KW .
MOON AND THE PLANETS, 1978, 18 (04) :447-464
[9]  
BIERMANN L, 1978, ASTRONOMICAL PAPERS, P327
[10]   GALACTIC PERTURBATIONS ON NEARLY-PARABOLIC COMETARY ORBITS [J].
BYL, J .
MOON AND THE PLANETS, 1983, 29 (02) :121-137
12345678