Results 201 to 210 of about 527 (254)
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Earth, Moon, and Planets, 2004
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Science, 1968
The meteoroid experiments by five Lunar Orbiters have provided direct measurements in the near-lunar environment of the rate of penetration of 0.025-millimeter beryllium copper by meteoroids. Each experiment used 20 pressurized-cell detectors having a total effective exposed area of 0.186 square meter.
C A, Gurtler, G W, Grew
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The meteoroid experiments by five Lunar Orbiters have provided direct measurements in the near-lunar environment of the rate of penetration of 0.025-millimeter beryllium copper by meteoroids. Each experiment used 20 pressurized-cell detectors having a total effective exposed area of 0.186 square meter.
C A, Gurtler, G W, Grew
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Symposium - International Astronomical Union, 1994
Meteoroid streams, producing meteor showers if some part of the stream has a node near 1 AU, have complex structures which are only just beginning to be understood. The old simplistic idea of a narrow loop being formed about the orbit of a parent comet with one, or possibly two, terrestrial intersection(s) is now being replaced by the recognition that ...
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Meteoroid streams, producing meteor showers if some part of the stream has a node near 1 AU, have complex structures which are only just beginning to be understood. The old simplistic idea of a narrow loop being formed about the orbit of a parent comet with one, or possibly two, terrestrial intersection(s) is now being replaced by the recognition that ...
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Meteoritics, 1964
AbstractAluminum bumpers (Type 6061‐T6) with thicknesses of 0.1875, 0.125, 0.090, 0.063, and 0.032 inch have been subjected to impact with a 0.57 gram cylindrical steel projectile traveling at 9,400 to 21,700 ft/sec. In addition, the 0.032 inch bumpers were subjected to impact with 0.21 gram cylindrical steel projectiles traveling at 11,800 to 14,700 ...
R. F. ROLSTEN +2 more
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AbstractAluminum bumpers (Type 6061‐T6) with thicknesses of 0.1875, 0.125, 0.090, 0.063, and 0.032 inch have been subjected to impact with a 0.57 gram cylindrical steel projectile traveling at 9,400 to 21,700 ft/sec. In addition, the 0.032 inch bumpers were subjected to impact with 0.21 gram cylindrical steel projectiles traveling at 11,800 to 14,700 ...
R. F. ROLSTEN +2 more
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Interplanetary Meteoroid Environment Model Update
Journal of Spacecraft and Rockets, 1998The effects of the sporadic meteoroid environment on interplanetary spacecraft have an important impact on mission design. A reformulation is described of the Divine interplanetary meteoroid model, called the meteoroid engineering model (METEM), that is capable of estimating many ofthoseeffects.
Henry Garrett +3 more
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Conference summary: Meteoroids
Earth, Moon, and Planets, 1996Summarizing our meeting for its meteoroid part is mostly the task of definition, what meteoroids are. Some are certainly small pieces of comets as we know from meteor-stream comet associations. Jewitt in his invited talk draw our attention to definition of terms: asteroid and comet. It is certainly used as phenomenalistic description of the bodies, but
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RADAR MEASUREMENTS OF METEOROID DECELERATIONS
Earth, Moon, and Planets, 2004Measurements of meteoroid velocities and decelerations have been obtained from post-t 0 diffraction patterns present in echo signatures obtained from the multi-site AMOR radar operated at the University of Canterbury’s research facility. The system allows the sampling of a meteoroid’s velocity at separated points along the body’s trajectory to yield ...
W. J. Baggaley, J. Grant
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SAE Technical Paper Series, 1965
<div class="htmlview paragraph">The effects of meteoroid protection weight requirements on space exploration costs are examined. A basis is developed for selecting upper and lower bounds to the acceptable risk. The quality of present knowledge of the meteoroid environment and of hypervelocity impact penetration is reviewed.
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<div class="htmlview paragraph">The effects of meteoroid protection weight requirements on space exploration costs are examined. A basis is developed for selecting upper and lower bounds to the acceptable risk. The quality of present knowledge of the meteoroid environment and of hypervelocity impact penetration is reviewed.
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Science, 1974
Data on interplanetary and near-Jupiter micrometer-sized particle encounters from the meteoroid-detection experiment on Pioneer 10 indicate that Jupiter is much 'dustier' than interplanetary space. Whereas the near-earth particulate flux showed very little increase over the interplanetary flux, the near-Jupiter penetration flux was over two orders of ...
W H, Kinard +3 more
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Data on interplanetary and near-Jupiter micrometer-sized particle encounters from the meteoroid-detection experiment on Pioneer 10 indicate that Jupiter is much 'dustier' than interplanetary space. Whereas the near-earth particulate flux showed very little increase over the interplanetary flux, the near-Jupiter penetration flux was over two orders of ...
W H, Kinard +3 more
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Solar System Research, 2001
The density of the Galactic meteoroid background formed by the loss of large dust grains escaped from circumstellar disks during the formation of a star is estimated. This density is shown to be substantially higher than the local density of meteoroids that escaped from dusty stellar disks as a result of two-star collisions.
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The density of the Galactic meteoroid background formed by the loss of large dust grains escaped from circumstellar disks during the formation of a star is estimated. This density is shown to be substantially higher than the local density of meteoroids that escaped from dusty stellar disks as a result of two-star collisions.
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