Results 31 to 40 of about 4,059 (221)
Atmospheric collection of extraterrestrial dust at the Earth's surface in the mid‐Pacific
Meteoritics &Planetary Science, Volume 59, Issue 10, Page 2789-2817, October 2024.Abstract The Kwajalein micrometeorite collection utilized high volume air samplers fitted with polycarbonate membrane filters to capture particles directly from the atmosphere at the Earth's surface. This initial study focused on identifying cosmic spherule‐like particles, conservatively categorizing them into four groups based on bulk compositional ...
Penelope J. Wozniakiewicz +8 more
wiley +1 more source
Explaining the Evolution of Ion Velocity Distributions at a Low Activity Comet
Journal of Geophysical Research: Space Physics, Volume 129, Issue 9, September 2024.Abstract At a low activity comet the plasma is distributed in an asymmetric way. The hybrid simulation code Amitis is used to look at the spatial evolution of ion velocity distribution functions (VDFs), from the upstream solar wind (SW) to within the comet magnetosphere where the SW is heavily mass‐loaded by the cometary plasma.
A. Moeslinger +4 more
wiley +1 more source
Not So Fast: A New Catalog of Meteor Persistent Trains
Journal of Geophysical Research: Space Physics, Volume 129, Issue 7, July 2024.Abstract This paper presents the results of a nearly 2‐year long campaign to detect and analyze meteor persistent trains (PTs)—self‐emitting phenomena which can linger up to an hour after their parent meteor. The modern understanding of PTs has been primarily developed from the Leonid storms at the turn of the century; our goal was to assess the ...
L. E. Cordonnier +4 more
wiley +1 more source
Commonsense morality and contact with value
Philosophy and Phenomenological Research, Volume 109, Issue 1, Page 410-430, July 2024.Abstract There seem to be many kinds of moral duties. We should keep our promises; we should pay our debts of gratitude; we should compensate those we've wronged; we should avoid doing or intending harm; we should help those in need. These constitute, some worry, an unconnected heap of duties: the realm of commonsense morality is a disorganized mess ...
Adam Lovett, Stefan Riedener
wiley +1 more source
2005–2010 Multiwavelength Campaing of OJ287
Acta Polytechnica, 2011 The light curve of quasar OJ287 extends from 1891 up today without major gaps. This is partly due to extensive studies of historical plate archives by Rene Hudec and associates, and partly due to several observing campaigns in recent times.
M. Valtonen, A. Sillanpää
doaj
Geophysical Research Letters, Volume 51, Issue 12, 28 June 2024.Abstract We use in situ plasma observations made by the Pioneer Venus Orbiter spacecraft to show for the first time that magnetosonic waves can couple the solar wind to the upper ionosphere and deposit energy there. The waves are generated upstream of Venus, are advected into the shock and propagate across the draped magnetic field, through the ...
C. M. Fowler +5 more
wiley +1 more source
Journal of Advances in Modeling Earth Systems, Volume 16, Issue 5, May 2024.Abstract The gravity wave drag parametrization of the Whole Atmosphere Community Climate Model (WACCM) has been modified to include the wave‐driven atmospheric vertical mixing caused by propagating, non‐breaking, gravity waves. The strength of this atmospheric mixing is represented in the model via the “effective wave diffusivity” coefficient (Kwave ...
Maria‐Vittoria Guarino +8 more
wiley +1 more source
Seeing Halley's Comet: A guide for observers in the Northern Hemisphere [PDF]
A guide for the observation of Halley's comet is presented. The path of the comet is described for the fly by dates and charts are provided for location of the comet in the morning or evening skies.
core +1 more source
Mission strategy for cometary exploration in the 1980's [PDF]
A specific plan for a sequence of cometary intercept missions in the 1980's is reported. Each mission is described in detail and the supporting role of ground based cometary observations is included.
Farquhar, R. W.
core +4 more sources
Halley's comet 1985-86: space exploration [PDF]
A coordinated program to explore Halley's comet in 1985 to 86 is proposed. The program employs a variety of observational systems for remote observations and utilizes spacecraft encounters with the comet to obtain in-situ measurements.
Farquhar, R. W., Wooden, W. H., II
core +1 more source