Results 51 to 60 of about 450 (192)

Болід [Bolid]

, 2004
БОЛІ́Д (від грец. βολίς – метальний спис) – яскравий метеор, блиск якого при спостереженні з Землі перевищує блиск планети Венера. Тому яскраві Б. можна спостерігати і вдень. Б. – тверді космічні частинки, які входять у земну атмосферу зі швидкістю від 11 до 72 км/сек. і мають ма... ⚠️ Цей запис містить лише бібліографічні метадані.
openaire   +2 more sources

Life After Impact: Paleobathymetric Gradients in Post‐K/Pg Nannoplankton Boom‐Bust Successions

Paleoceanography and Paleoclimatology, Volume 41, Issue 10, October 2026.
Abstract The Cretaceous/Paleogene (K/Pg) bolide impact ∼66 Ma caused the near‐demise of calcareous nannoplankton–key primary producers and major components of the biological pump that exports organic and inorganic carbon to the deep sea. Despite their ecological significance, resolving the exact impact of nannoplankton's mass extinction on ecosystem ...
Heather L. Jones, Lorna E. Kearns, Julio Sepúlveda, Christopher M. Lowery, Laia Alegret, Thomas Westerhold, M. Hedi Negra, Michael J. Henehan, Jessica H. Whiteside, Johan Vellekoop, Mark E. Patzkowsky, Timothy J. Bralower   +11 more
wiley   +1 more source

Probing Subsurface Properties With Mission Hardware: Lessons Learned From Artificial Impacts of Mars 2020

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract Hardware released during spacecraft entry can generate hypervelocity impacts that provide unique constraints on planetary subsurface properties. During NASA's Perseverance descent, two tungsten cruise ballast mass devices (CBMD) and fragments of the cruise stage formed meter‐scale craters north‐west of Jezero crater, in one of the sinuous ...
A. J. Sokołowska, I. J. Daubar, G. S. Collins, F. Calef, A. Jones   +4 more
wiley   +1 more source

Neutron Diffraction Evidence for Stress‐Induced Melting of Ice During Deformation of D2O‐Ice Ih—Fluorite Mixtures

Journal of Geophysical Research: Planets, Volume 131, Issue 9, September 2026.
Abstract Water ice is an important rock‐forming mineral, both on the Earth and on various extraterrestrial bodies. Naturally occurring ice is often “dirty”–an intimate mixture with harder mineral grains, which can have significant effects on the bulk properties of the aggregate. We have used neutron powder diffraction, with in situ triaxial deformation,
Ceri A. Middleton, A. Dominic Fortes, Peter M. Grindrod, Shu Yan Zhang, Stephen J. Covey‐Crump, Peter R. Sammonds, Ian G. Wood, David P. Dobson, Lidunka Vočadlo, Simon A. Hunt   +9 more
wiley   +1 more source

Current Impact Rate on Earth, Moon, and Mars [PDF]

, 2015
Planets are getting whacked, but are the bolides mostly from asteroids or comets?
Byrne, S., Oberst, J., McEwen, A.S., Daubar, I. J., Ivanov, B. A., Malhotra, R., JeongAhn, Y.   +6 more
core   +1 more source

Bolide light curve systematics from 75 recovered meteorites

Meteoritics &Planetary Science, Volume 61, Issue 9, Page 2351-2392, September 2026.
Abstract How does the energy deposition profile (light curve), deceleration, and penetration depth in Earth's atmosphere depend on asteroid composition and meteorite type? Here, we present the light curve and velocity profile of 75 bolides from camera‐documented meteorite falls.
Peter Jenniskens, Stuart Pilorz, Darrel Robertson, Eric C. Stern   +3 more
wiley   +1 more source

Bolide Infrasound Signal Morphology and Yield Estimates: A Case Study of Two Events Detected by a Dense Acoustic Sensor Network

The Astronomical Journal
Two bolides (2016 June 2 and 2019 April 4) were detected at multiple regional infrasound stations, with many of the locations receiving multiple detections.
Trevor C. Wilson, Elizabeth A. Silber, Thomas A. Colston, Brian R. Elbing, Thom R. Edwards   +4 more
doaj   +1 more source

METHODS OF QUALITATIVE ANALYSIS IN THE PROBLEM OF RIGID BODY MOTION IN MEDIUM

, 2011
The present paper describes the application of methods of qualitative analysis in the classical problem of rigid body motion in medium. Three particular problems are used as examples: bolides flight, galloping of aeroelastic constructions, and behavior ...
MARAT Z. DOSAEV, VITALY A. SAMSONOV, YURY D. SELYUTSKIY   +2 more
core   +1 more source

Application of a novel schema for describing fossil fern foliage and investigating taxonomic and morphological change across the Cretaceous–Paleogene boundary in western North America

American Journal of Botany, Volume 113, Issue 8, August 2026.
Abstract Premise The Chicxulub asteroid impact at the Cretaceous–Paleogene (K–Pg) boundary triggered a mass extinction 66 million years ago. Ferns thrived in the aftermath of the extinction, evidenced by the well‐documented “fern spore spike.” However, fern macrofossil records across the K–Pg boundary are less understood.
Fern B. Holian, Emily B. Sessa, Richard S. Barclay, Regan E. Dunn, Jacquelyn L. Gill, Kirk R. Johnson, S. Augusta Maccracken, Ian M. Miller, Jarmila Pittermann, Ellen D. Currano   +9 more
wiley   +1 more source

Fireballs recorded between May and July 2021 by the Southwestern Europe Meteor Network [PDF]

, 2021
This work focuses on the analysis of the most remarkable bolides recorded over the Iberian Peninsula and neighboring areas in the framework of the Southwestern Europe Meteor Network (SWEMN) and the SMART project.
Ávila, D., Yanguas Sayas, Patricia, Guindos, E. de, Santos-Sanz, P., San Segundo, A., Izquierdo, J., Madiedo, J. M., Aceituno, J., Ortiz, J. L., Palacián Subiela, Jesús Francisco   +9 more
core