Results 201 to 210 of about 10,691 (260)
An estimate of the impact rate on Mars from statistics of very-high-frequency marsquakes. [PDF]
Nat AstronZenhäusern G +8 more
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Deep microbial colonization during impact-generated hydrothermal circulation at the Lappajärvi impact structure, Finland. [PDF]
Nat CommunGustafsson J +9 more
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Automated Lunar Crater Identification with Chandrayaan-2 TMC-2 Images using Deep Convolutional Neural Networks. [PDF]
Sci RepSinha M +4 more
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Astronomy and Astrophysics, 2019 Context.A significant fraction of small meteors are produced by iron meteoroids. Their origin and the interaction with the atmosphere have not been well explained up to now.Aims.The goals of the study are to observe faint, slow, low altitude meteors, to identify candidates for iron meteoroids among them, to model their ablation and light curves, and to
David Capek +2 more
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Prediction of meteoroid stream structure based on meteoroid fragmentation
Journal of Astrophysics and Astronomy, 2020Every day, large number of meteoroids enter the Earth’s atmosphere and deposit their mass either in atomic form or in ionic form depending on whether it has undergone ablation or fragmentation. The heavier meteoroids undergo fragmentation while the lighter ones are more prone to ablate.
K. SANJEEV KUMAR +3 more
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Earth, Moon, and Planets, 2004
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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
openaire +1 more source