The interplanetary dust cloud, or zodiacal cloud (as the source of the
zodiacal light), consists of
cosmic dust (small
particles floating in
outer space) that pervades the space between
planets within
planetary systems, such as the
Solar System.[2] This system of particles has been studied for many years in order to understand its nature, origin, and relationship to larger bodies. There are several methods to obtain
space dust measurement.
In the Solar System, interplanetary dust particles have a role in
scatteringsunlight and in emitting
thermal radiation, which is the most prominent feature of the
night sky's radiation, with wavelengths ranging 5–50
μm.[3] The
particle sizes of grains characterizing the
infrared emission near
Earth's orbit typically range 10–100 μm.[4] Microscopic impact craters on lunar rocks returned by the
Apollo Program[5] revealed the size distribution of
cosmic dust particles bombarding the lunar surface. The
’’Grün’’ distribution of interplanetary dust at 1 AU,[6] describes the flux of
cosmic dust from nm to mm sizes at 1 AU.
The total mass of the interplanetary dust cloud is approximately the mass of an
asteroid of radius 15 km (with density of about 2.5 g/cm3).[7] Straddling the
zodiac along the
ecliptic, this dust cloud is visible as the zodiacal light in a moonless and naturally dark sky and is best seen sunward during astronomical
twilight.
The Pioneer spacecraft observations in the 1970s linked the
zodiacal light with the interplanetary dust cloud in the Solar System.[8] Also, the
VBSDC instrument on the New Horizons probe was designed to detect impacts of the dust from the zodiacal cloud in the Solar System.[9]
Origin
The sources of interplanetary dust particles (IDPs) include at least: asteroid collisions,
cometary activity and collisions in the inner Solar System,
Kuiper belt collisions, and
interstellar medium grains (Backman, D., 1997). The origins of the zodiacal cloud have long been subject to one of the most heated controversies in the field of astronomy.
It was believed that IDPs had originated from comets or asteroids whose particles had dispersed throughout the extent of the cloud. However, further observations have suggested that Mars
dust storms may be responsible for the zodiacal cloud's formation.[10][2]
Life cycle of a particle
The main physical processes "affecting" (destruction or expulsion mechanisms) interplanetary dust particles are: expulsion by
radiation pressure, inward
Poynting-Robertson (PR) radiation drag,
solar wind pressure (with significant electromagnetic effects),
sublimation, mutual collisions, and the dynamical effects of planets (Backman, D., 1997).
The lifetimes of these dust particles are very short compared to the lifetime of the Solar System. If one finds grains around a star that is older than about 10,000,000 years, then the grains must have been from recently released fragments of larger objects, i.e. they cannot be leftover grains from the
protoplanetary disk (Backman, private communication).[citation needed] Therefore, the grains would be "later-generation" dust. The zodiacal dust in the Solar System is 99.9% later-generation dust and 0.1% intruding
interstellar medium dust. All primordial grains from the Solar System's formation were removed long ago.
Particles which are affected primarily by radiation pressure are known as "beta meteoroids". They are generally less than 1.4 × 10−12 g and are pushed outward from the Sun into interstellar space.[11]
Cloud structures
The interplanetary dust cloud has a complex structure (Reach, W., 1997). Apart from a background density, this includes:
At least 2 resonant dust rings are known (for example, the Earth-resonant dust ring, although every planet in the Solar System is thought to have a resonant ring with a "wake") (Jackson and Zook, 1988, 1992) (Dermott, S.F. et al., 1994, 1997)
Dust collection on Earth
In 1951,
Fred Whipple predicted that micrometeorites smaller than 100 micrometers in diameter might be decelerated on impact with the Earth's upper atmosphere without melting.[12] The modern era of laboratory study of these particles began with the stratospheric collection flights of
Donald E. Brownlee and collaborators in the 1970s using balloons and then
U-2 aircraft.[13]
Although some of the particles found were similar to the material in present-day meteorite collections, the
nanoporous nature and unequilibrated cosmic-average composition of other particles suggested that they began as fine-grained aggregates of nonvolatile building blocks and cometary ice.[14][15] The interplanetary nature of these particles was later verified by
noble gas[16] and
solar flare track[17] observations.
In that context a program for atmospheric collection and curation of these particles was developed at
Johnson Space Center in Texas.[18] This stratospheric micrometeorite collection, along with
presolar grains from meteorites, are unique sources of
extraterrestrial material (not to mention being small astronomical objects in their own right) available for study in laboratories today.
Collections of review articles on various aspects of interplanetary dust and related fields appeared in the following books:
In 1978
Tony McDonnell edited the book Cosmic Dust[19] which contained chapters[20] on comets along with zodiacal light as indicator of interplanetary dust, meteors, interstellar dust, microparticle studies by sampling techniques, and microparticle studies by space instrumentation. Attention is also given to lunar and planetary impact erosion, aspects of particle dynamics, and acceleration techniques and high-velocity impact processes employed for the laboratory simulation of effects produced by micrometeoroids.
2001
Eberhard Grün, Bo Gustafson, Stan Dermott, and Hugo Fechtig published the book Interplanetary Dust.[21] Topics covered[22] are: historical perspectives; cometary dust; near-Earth environment; meteoroids and meteors; properties of interplanetary dust, information from collected samples; in situ measurements of cosmic dust; numerical modeling of the Zodiacal Cloud structure; synthesis of observations; instrumentation; physical processes; optical properties of interplanetary dust; orbital evolution of interplanetary dust; circumplanetary dust, observations and simple physics; interstellar dust and circumstellar dust disks.
2019 Rafael Rodrigo, Jürgen Blum, Hsiang-Wen Hsu, Detlef V. Koschny,
Anny-Chantal Levasseur-Regourd, Jesús Martín-Pintado, Veerle J. Sterken, and Andrew Westphal collected reviews in the book Cosmic Dust from the Laboratory to the Stars.[23] Included are discussions[24] of dust in various environments: from planetary atmospheres and airless bodies over interplanetary dust, meteoroids, comet dust and emissions from active moons to interstellar dust and protoplanetary disks. Diverse research techniques and results, including in-situ measurement, remote observation, laboratory experiments and modelling, and analysis of returned samples are discussed.
Rings of dust
Interplanetary dust has been found to form rings of dust in the orbital space of Mercury and Venus.[25] Venus's orbital dust ring is suspected to originate either from yet undetected Venus trailing asteroids,[25] interplanetary dust migrating in waves from orbital space to orbital space, or from the remains of the Solar System's
circumstellar disc, out of which its
proto-planetary disc and then itself, the Solar
planetary system, formed.[26]
^Pavlov, Alexander A.; Pavlov, Anatoli K.;
Kasting, James F. (1999). "Irradiated interplanetary dust particles as a possible solution for the deuterium/hydrogen paradox of Earth's oceans". Journal of Geophysical Research: Planets. 104 (E12): 30725–28.
Bibcode:
1999JGR...10430725P.
doi:
10.1029/1999JE001120.
PMID11543198.
^Horányi, M.; Hoxie, V.; James, D.; Poppe, A.; Bryant, C.; Grogan, B.; Lamprecht, B.; Mack, J.; Bagenal, F.; S. Batiste; Bunch, N.; Chantanowich, T.; Christensen, F.; Colgan, M.; Dunn; Drake, G.; Fernandez, A.; Finley, T.; Holland, G.; Jenkins, A.; Krauss, C.; Krauss, E.; Krauss, O.; Lankton, M.; Mitchell, C.; Neeland, M.; Resse, T.; Rash, K.; Tate, G.; Vaudrin, C.; Westfall, J. (2008).
"The Student Dust Counter on the New Horizons Mission"(PDF). Space Science Reviews. 140 (1–4): 387–402.
Bibcode:
2008SSRv..140..387H.
doi:
10.1007/s11214-007-9250-y.
S2CID17522966. Retrieved 17 September 2022.
^Shekhtman, Svetlana (8 March 2021).
"Serendipitous Juno Detections Shatter Ideas About Zodiacal Light". NASA. Retrieved 8 May 2022. While there is good evidence now that Mars, the dustiest planet we know of, is the source of the zodiacal light, Jørgensen and his colleagues cannot yet explain how the dust could have escaped the grip of Martian gravity.
^Brownlee, D. E. (December 1977). "Interplanetary dust - Possible implications for comets and presolar interstellar grains". In: Protostars and Planets: Studies of Star Formation and of the Origin of the Solar System. (A79-26776 10-90) Tucson: 134–150.
Bibcode:
1978prpl.conf..134B.
^Fraundorf, P.;
Brownlee, D. E. & Walker, R. M. (1982) [1st pub. 1986]. "Laboratory studies of interplanetary dust". In Wilkening, L. (ed.). Comets. University of Arizona Press. pp. 383–409.
^Walker, R. M. (January 1986). "Laboratory studies of interplanetary dust". In NASA. 2403: 55.
Bibcode:
1986NASCP2403...55W.
^Hudson, B.; Flynn, G. J.; Fraundorf, P.; Hohenberg, C. M.; Shirck, J. (January 1981). "Noble Gases in Stratospheric Dust Particles: Confirmation of Extraterrestrial Origin". Science. 211 (4480): 383–386(SciHomepage).
Bibcode:
1981Sci...211..383H.
doi:
10.1126/science.211.4480.383.
PMID17748271.
Dermott, S.F.; Jayaraman, S.; Xu, Y.L.; Gustafson, A.A.S.; Liou, J.C. (30 June 1994). "A circumsolar ring of asteroid dust in resonant lock with the Earth". Nature. 369 (6483): 719–23.
Bibcode:
1994Natur.369..719D.
doi:
10.1038/369719a0.
S2CID4345910.
Dermott, S.F. (1997). "Signatures of Planets in Zodiacal Light". Extrasolar Zodiacal Emission - NASA Study Panel Report.
Levasseur-Regourd, A.C. (1996). "Optical and Thermal Properties of Zodiacal Dust". Physics, Chemistry and Dynamics of Interplanetary Dust, ASP Conference series, Vol 104. pp. 301–.
Reach, W. (1997). "General Structure of the Zodiacal Dust Cloud". Extrasolar Zodiacal Emission - NASA Study Panel Report.