Results 41 to 50 of about 4,557 (205)
New Signatures of Bio-Molecular Complexity in the Hypervelocity Impact Ejecta of Icy Moon Analogues
Life, 2022 Impact delivery of prebiotic compounds to the early Earth from an impacting comet is considered to be one of the possible ways by which prebiotic molecules arrived on the Earth.
Surendra V. Singh +11 more
doaj +1 more source
On the Ontology of Composites in Abhidharma Buddhism
Philosophy and Phenomenological Research, EarlyView.ABSTRACT Abhidharma Buddhism maintains that the only ultimately real (paramārtha) entities in the universe are dharmas, which are simples. What then is the ontological status of composites on this theory? One possibility is that Abhidharma Buddhists deny the reality of composites.
Monima Chadha, Shaun Nichols
wiley +1 more source
The Astronomical JournalHow effective are methods for estimating bolide energies from infrasound signal period-yield relationships? A single global period–energy relation can obscure significant variability introduced by parameters such as the atmospheric Doppler wind profile ...
Elizabeth A. Silber +20 more
doaj +1 more source
Plant ecological strategies shift across the Cretaceous-Paleogene boundary.
PLoS Biology, 2014 The Chicxulub bolide impact caused the end-Cretaceous mass extinction of plants, but the associated selectivity and ecological effects are poorly known. Using a unique set of North Dakota leaf fossil assemblages spanning 2.2 Myr across the event, we show
Benjamin Blonder +4 more
doaj +1 more source
Odessa Astronomical Publications, 2016 Authors created and provided the operation of the first version of the "Bolide Network of Churyumov" for continuous recording of twilight and daytime traces of aerial and aerospace intrusions overKievandKievdistrict during 2013-2016.
K. I. Churyumov +5 more
doaj +1 more source
Rivista Italiana di Paleontologia e Stratigrafia, 2022 Deep-water agglutinated foraminifera (DWAF) are investigated from the lower Paleocene of the Contessa Highway Paleocene (CHP) section in the Umbria-Marche Basin in Italy.
SYOUMA HIKMAHTIAR +2 more
doaj +1 more source
What Can Craters Tell Us About a Planet? [PDF]
In this activity, students examine images of Martian craters and speculate about what caused them. Next, they model the formation of an impact crater by dropping objects into a tray of powder. They examine the effects of each impact and the features each
core +1 more source
Physics of the Chelyabinsk bolide [PDF]
Astronomical School’s Report, 2013 Shown, that estimations of the Chelyabinsk body size order of 20–30 m (15/02/2013 phenomenon), publishing in the press, are overstated significantly. Estimations of its explosion height are wrong. On the basis of the destructions by action of the shock wave, the height of explosion must be no more than 10–12 km. We think, that the Chelyabinsk meteorite
V. G. Kruchinenko +2 more
openaire +2 more sources
Discovery of the Baijifeng impact structure in Tonghua, Jilin, China
Matter and Radiation at Extremes, 2023 An impact structure 1400 m in diameter, formed by a bolide impact, has been discovered on Baijifeng Mountain in Tonghua City in Northeast China’s Jilin province. The impact structure takes the form of a cirque-shaped depression on the top of the mountain
Ming Chen +5 more
doaj +1 more source
Impact of an asteroid or comet in the ocean and extinction of terrestrial life [PDF]
, 1983 Finite difference calculations describing the impact mechanics associated with a 10 to 30 km diameter silicate or water object impacting a 5 km deep ocean overlying a silicate solid planet demonstrate that from 12 to 15% of the bolide energy resides in ...
Ahrens, T. J., Okeefe, J. D.
core +1 more source