Lunar soil movement registerd by the apollo 17 cosmic dust experiment

Berg, O. E.; Wolf, Hinko; Rhee, John W.

doi:10.1007/3-540-07615-8_486

Cited by 76 publications

(13 citation statements)

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“…Images from the Surveyor lunar lander spacecraft showed an unexpected "horizon glow", caused by forward scattering from dust particles ∼10 µm in size located ∼1 m above the surface (Rennilson and Criswell 1974). Later, the Lunar Ejecta and Meteorites (LEAM) dust detection experiment of Apollo 17 recorded the impact of low velocity (≤100 m s −1 ) dust particles, and showed particularly intense fluxes of such particles near local sunrise and sunset (Berg et al 1976). The measured dust particles fluxes are ∼7 orders of magnitude too large to be associated with churning of the surface by micrometeorite bombardment.…”

Section: Electrostatic Forcesmentioning

confidence: 99%

The Active Asteroids

Jewitt¹,

Hsieh²,

Agarwal³

2015

Asteroids IV

134

176

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Some asteroids eject dust, producing transient, comet-like comae and tails; these are the active asteroids. The causes of activity in this newly-identified population are many and varied. They include impact ejection and disruption, rotational instabilities, electrostatic repulsion, radiation pressure sweeping, dehydration stresses and thermal fracture, in addition to the sublimation of asteroidal ice. These processes were either unsuspected or thought to lie beyond the realm of observation before the discovery of asteroid activity. Scientific interest in the active asteroids lies in their promise to open new avenues into the direct study of asteroid destruction, the production of interplanetary debris, the abundance of asteroid ice and the origin of terrestrial planet volatiles.

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Section: Electrostatic Forcesmentioning

confidence: 99%

The Active Asteroids

Jewitt¹,

Hsieh²,

Agarwal³

2015

Asteroids IV

134

176

View full text Add to dashboard Cite

show abstract

“…Images from the Surveyor lunar lander spacecraft showed an unexpected "horizon glow," caused by forward scattering from dust particles ∼10 μm in size located ∼1 m above the surface (Rennilson & Criswell 1974). Later, the Lunar Ejecta and Meteorites (LEAM) dust detection experiment of Apollo 17 recorded the impact of low-velocity ( 100 m s −1 ) dust particles and showed particularly intense fluxes of such particles near local sunrise and sunset (Berg et al 1976). The measured dust particle fluxes are ∼7 orders of magnitude too large to be associated with churning of the surface by micrometeorite bombardment.…”

Section: Electrostatic Forcesmentioning

confidence: 99%

The Active Asteroids

Jewitt

2012

The Astronomical Journal

297

244

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Some asteroids eject dust, unexpectedly producing transient, comet-like comae and tails. First ascribed to the sublimation of near-surface water ice, mass-losing asteroids (also called "main-belt comets") can in fact be driven by a surprising diversity of mechanisms. In this paper, we consider 11 dynamical asteroids losing mass, in nine of which the ejected material is spatially resolved. We address mechanisms for producing mass loss including rotational instability, impact ejection, electrostatic repulsion, radiation pressure sweeping, dehydration stresses, and thermal fracture, in addition to the sublimation of ice. In two objects (133P and 238P) the repetitive nature of the observed activity leaves ice sublimation as the only reasonable explanation, while in a third ((596) Scheila), a recent impact is the cause. Another impact may account for activity in P/2010 A2, but this tiny object can also be explained as having shed mass after reaching rotational instability. Mass loss from (3200) Phaethon is probably due to cracking or dehydration at extreme (∼1000 K) perihelion temperatures, perhaps aided by radiation pressure sweeping. For the other bodies, the mass-loss mechanisms remain unidentified, pending the acquisition of more and better data. While the active asteroid sample size remains small, the evidence for an astonishing diversity of mass-loss processes in these bodies is clear.

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“…The Lunar Ejecta And Meteorite (LEAM) Experiment was designed to measure the impact of micrometeorites and their hypervelocity ejecta (Berg et al, 1976). However, most impacts detected were not from hypervelocity particles, and they occurred at the terminator as illustrated in Fig.…”

Section: Dust Lifting On the Moonmentioning

confidence: 99%

“…The observation by Apollo astronauts of crepuscular rays at the terminator provides further evidence of dust lifting on the Moon (McCoy, 1976). These lunar crepuscular rays are probably caused by the scattering of sunlight by small dust particles with diameters of ~ 0.2 µm at altitudes ranging from 1 to 100 km (Berg et al, 1976).…”

Section: Dust Lifting On the Moonmentioning

confidence: 99%

Electrical Activity and Dust Lifting on Earth, Mars, and Beyond

Rennó

Kok

2008

Space Sci Rev

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We review electrical activity in blowing sand and dusty phenomena on Earth, Mars, the Moon, and asteroids. On Earth and Mars, blowing sand and dusty phenomena such as dust devils and dust storms are important geological processes and the primary sources of atmospheric dust. Large electric fields have been measured in terrestrial dusty phenomena and are predicted to occur on Mars. We review the charging mechanisms that produce these electric fields and discuss the implications of electrical activity on dust lifting and atmospheric chemistry. In addition, we review the ideas that support the occurrence of electric discharges on Mars. Finally, we discuss the evidence that electrostatics is responsible for dust transport on the Moon and asteroids.

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Lunar soil movement registerd by the apollo 17 cosmic dust experiment

Cited by 76 publications

References 1 publication

The Active Asteroids

The Active Asteroids

The Active Asteroids

Electrical Activity and Dust Lifting on Earth, Mars, and Beyond

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