Comets in the Path of Earth

被引：2

作者：

Jenniskens, Peter ^{[1
]}

Popova, Olga ^{[2
]}

机构：

[1] SETI Inst, 189 Bernardo Ave, Mountain View, CA 94043 USA

[2] Russian Acad Sci, Inst Dynam Geospheres, Leninsky Prospect 38 Bldg 1, Moscow 119334, Russia

来源：

ELEMENTS | 2018年 / 14卷 / 02期

关键词：

comet; impact; meteor; meteoroid; interplanetary dust; zodiacal cloud; IMPACTORS; AIRBURST; JUPITER; ORIGIN; CLOUD;

D O I：

10.2138/gselements.14.2.107

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Earth's atmosphere offers little protection against comet impacts, because many comets are bigger than 1 km. Fewer comets hit Earth than asteroids of the same size, except perhaps for sizes larger than 10 km. Comets release copious amounts of solid debris called meteoroids, and these meteoroids disperse to form meteoroid streams, some of which cause meteor showers on Earth. Recent meteor shower observations reveal the presence of potentially dangerous parent comets and trace their dynamical evolution. In addition, some showers leave a signature of "cosmic dust" in our atmosphere.

引用

页码：107 / 112

页数：6

共 50 条

[11] The earth ard comets tails.
Innes, RTA
NATURE, 1910, 83 : 459 - 459
[12] Comets in the near-Earth object population
Demeo, Francesca
Binzel, Richard P.
ICARUS, 2008, 194 (02) : 436 - 449
[13] IMPACTS ON THE EARTH BY ASTEROIDS AND COMETS - ASSESSING THE HAZARD
CHAPMAN, CR
MORRISON, D
NATURE, 1994, 367 (6458) : 33 - 40
[14] THE FUNDAMENTAL ROLE OF GIANT COMETS IN EARTH HISTORY
Clube, S. V. M.
CELESTIAL MECHANICS & DYNAMICAL ASTRONOMY, 1992, 54 (1-3): : 179 - 193
[15] Diatoms on Earth, comets, Europa and in interstellar space
Hoover, RB
Hoyle, F
Wickramasinghe, NC
Hoover, MJ
Al-Mufti, S
ASTROPHYSICS AND SPACE SCIENCE, 1999, 268 (1-3) : 197 - 224
[16] DIATOMS ON EARTH, COMETS, EUROPA AND IN INTERSTELLAR SPACE
HOOVER, RB
HOYLE, F
WICKRAMASINGHE, NC
HOOVER, MJ
ALMUFTI, S
EARTH MOON AND PLANETS, 1986, 35 (01): : 19 - 45
[17] COMETS AND FORMATION OF BIOCHEMICAL COMPOUNDS ON PRIMITIVE EARTH
ORO, J
NATURE, 1961, 190 (477) : 389 - &
[18] NEIGHBORS OF EARTH - PLANETS COMETS AND DEBRIS OF SPACE
DWIGHT, CH
AMERICAN JOURNAL OF PHYSICS, 1966, 34 (04) : 368 - &
[19] Defense of earth against large comets and asteroids
Friedman, G
1997 IEEE AEROSPACE CONFERENCE PROCEEDINGS, VOL 4, 1997, : 5 - 29
[20] Galactic tides bring showers of comets to Earth
Gribbin, J
NEW SCIENTIST, 1996, 152 (2060) : 15 - 15

← 1 2 3 4 5 →