Results 111 to 120 of about 4,564 (304)

The futuristic manifolds of REM sleep

Journal of Sleep Research, Volume 34, Issue 2, April 2025.
Summary Since one of its first descriptions 70 years ago, rapid eye movement sleep has continually inspired and excited new generations of sleep researchers. Despite significant advancements in understanding its neurocircuitry, underlying mechanisms and microstates, many questions regarding its function, especially beyond the early neurodevelopment ...
Liborio Parrino, Ivana Rosenzweig
wiley   +1 more source

Lunar Meteoroid Impact Observations and the Flux of Kilogram-sized Meteoroids

, 2011
Lunar impact monitoring provides useful information about the flux of meteoroids in the hundreds of grams to kilograms size range. The large collecting area of the night side of the lunar disk, approximately 3.8 10(exp 6)sq km in our camera field-of-view,
Suggs, R. M., Cooke, W. J., Moser, D. E., Suggs, R. J., Koehler, H. M., Swift, W. R.   +5 more
core   +1 more source

The micrometeorite flux to Earth through the Phanerozoic Eon [Elektronisk resurs] : Reconstructed using sediment-dispersed extraterrestrial spinels

, 2021
The purpose of this thesis is to add an astronomical component to the history and evolution of Earth by reconstructing the micrometeorite flux to Earth at different time intervals during the Phanerozoic Eon, using sediment-dispersed extraterrestrial ...
Martin, Ellinor
core  

A record of the micrometeorite flux during an enigmatic extraterrestrial 3He anomaly in the Turonian (Late Cretaceous)

, 2019
We reconstructed a record of the micrometeorite flux in the Late Cretaceous using the distribution of extraterrestrial spinel grains across an ~2 m.y. interval of elevated 3He in the Turonian Stage (ca. 92–90 Ma).
Schmitz, Birger, Montanari, Alessandro, Martin, Ellinor   +2 more
core   +1 more source

Precious metal enrichment during impacts on the Moon

Communications Earth & Environment
Any sustained space exploration is likely to depend on the Moon and its resources. Understanding lunar mineral deposit potential, particularly for precious metals including Os, Ir, Ru, Rh, Pt, Pd, and Au (the platinum group elements, or PGE) and their ...
Yash Srivastava, James M. D. Day, Akira Yamaguchi, Amit Basu Sarbadhikari   +3 more
doaj   +1 more source

Noble gases and nitrogen in material from asteroid Bennu

Meteoritics &Planetary Science, EarlyView.
Abstract We report the elemental and isotopic abundances of all stable noble gases (helium, neon, argon, krypton, and xenon) in eight particles from asteroid Bennu returned by NASA's OSIRIS‐REx mission. We also report nitrogen abundances and isotopic ratios that were analyzed alongside neon and argon in four additional Bennu particles.
B. Marty, L. Zimmermann, E. Füri, D. V. Bekaert, J. J. Barnes, A. N. Nguyen, H. C. Connolly, D. S. Lauretta   +7 more
wiley   +1 more source

Lunar Highland Preserves Meteoritic-iron-rich Materials in the Earth–Moon System

The Astrophysical Journal
Meteoritic impacts over 4.5 billion yr have modified the composition and properties of the Earth and Moon’s surfaces. The low-iron lunar highlands (FeO ∼ 5 wt%) may provide insights into the contribution of meteoritic iron to the Earth–Moon system ...
Haojin Hu, Xiaojia Zeng, Xiongyao Li, Jianzhong Liu   +3 more
doaj   +1 more source

Araguainha Dome, Brazil: A polygonal impact structure due to a complex pre‐impact regional structural framework

Meteoritics &Planetary Science, EarlyView.
Abstract We investigated the structural framework of the north–northwestern Paraná Basin in Brazil to test whether the pre‐impact structures in this region may have had any influence on the first‐order formation and morphostructure of the Araguainha impact structure (AIS).
Renato B. Bernardes, Wolf U. Reimold, Roger L. Gibson, Julia B. Curto Ma, Adolfo B. Silva, Natalia Hauser   +5 more
wiley   +1 more source

Observation from the ground and analysis of emissions associated with meteoroides falling on the moon

, 2016
Les météoroïdes, issus de petits corps du système solaire produisent des phénomènes lumineux (flashs d'impact) lorsqu'ils percutent le sol de la Lune.
Ait Moulay Larbi, El mamoun
core  

Evaluating the Depth–Age Hypothesis for the Evolution of the Lunar Regolith

The Planetary Science Journal
Lunar regolith is the fractured rock layer covering most of the lunar surface. This rock is fractured into regolith primarily by repeated meteorite impacts over eons.
Gwendolyn D. Bart
doaj   +1 more source