Results 41 to 50 of about 1,176 (209)

Multiparameter Constraints on Empirical Infrasound Period-Yield Relations for Bolides and Implications for Planetary Defense

The Astronomical Journal
How 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, Josep M. Trigo-Rodríguez, Iyare Oseghae, Eloy Peña-Asensio, Mark Boslough, Rodney Whitaker, Christoph Pilger, Philip Lubin, Vedant Sawal, Claus Hetzer, Randy Longenbaugh, Peter Jenniskens, Brin Bailey, Esther Mas Sanz, Patrick Hupe, Alexander N. Cohen, Thom R. Edwards, Sasha Egan, Reynold E. Silber, Summer C. Czarnowski, Miro Ronac Giannone   +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, Dana L Royer, Kirk R Johnson, Ian Miller, Brian J Enquist   +4 more
doaj   +1 more source

«CHURYUMOV UNIFIED NETWORK»: NEW, IMPORTANT TASKS FOR ASTRONOMICAL OBSERVATORIES TO PROTECT SOCIETY IN THE ERA OF MODERN HYBRID WARS

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, A. P. Vidmachenko, A. F. Steklov, N. G. Dashkiev, Ya. O. Romanyuk, I. V. Stepakhno   +5 more
doaj   +1 more source

LOWER PALEOCENE DEEP-WATER AGGLUTINATED FORAMINIFERA FROM THE CONTESSA HIGHWAY SECTION (UMBRIA-MARCHE BASIN, ITALY): TAXONOMY, STRATIGRAPHIC DISTRIBUTION AND ASSEMBLAGE TURNOVER ACROSS THE CRETACEOUS/PALEOGENE BOUNDARY

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, Mike Kaminski, CLAUDIA G. CETEAN   +2 more
doaj   +1 more source

Mass Estinctions Caused by Large Bolide Impacts [PDF]

, 1987
In this talk, I will describe the wealth of evidence that has forced my colleagues and me to conclude that the great mass extinctions, 65 million years ago, were caused by a large bolide impact on the earth.
Lavarez, Luis W.
core  

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, Yang Lu, Jiahao Ning, Wenge Yang, Jinfu Shu, Ho-kwang Mao   +5 more
doaj   +1 more source

The Balloon Lidar Experiment BOLIDE [PDF]

, 2019
The Balloon Lidar Experiment BOLIDE was the first mesospheric lidar system carried by a long duration balloon. As part of NASA’s PMC-Turbo balloon payload, the lidar was launched from Kiruna, Sweden in July 2018 on a six day mission to northern Canada.
Baturkin, Volodymyr, Rempel, Dimitry, Kaifler, Bernd, Rossi, Philipp, Kaifler, Natalie, Büdenbender, Hans Christian   +5 more
core  

Observation d'un bolide

, 1896
Observation d'un bolide. In: Bulletin astronomique, tome 13, 1896. pp.
Bruck, Paul
core   +1 more source

Frequency‐Dependent Acoustic Reflection Coefficients of Flat Ground Assessed Using the Sonic Boom From the OSIRIS‐Rex Sample Return Capsule Recorded on Free Flying Balloons

Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract Low frequency sound can travel great distances in planetary atmospheres. When these waves reflect off the air/ground interface, energy may be absorbed or transferred to mechanical waves in the subsurface. This study describes the direct and reflected acoustic wave generated by the re‐entry of the OSIRIS‐REx Sample Return Capsule captured on a ...
Daniel C. Bowman, Jonathan M. Lees, Siddharth Krishnamoorthy, Elizabeth A. Silber, Jacob S. Izraelevitz, Ashish Goel, Emalee Hough, Zach Yap, Mirza Samnani, Michael J. Fleigle, Justin R. LaPierre, James A. Cutts, Attila Komjathy   +12 more
wiley   +1 more source

Oceans, Lakes, and Stromatolites on Mars

Advances in Astronomy, 2020
Billions of years ago, the Northern Hemisphere of Mars may have been covered by at least one ocean and thousands of lakes and rivers. These findings, based initially on telescopic observations and images by the Mariner and Viking missions, led ...
Rhawn G. Joseph, Olivier Planchon, N. S. Duxbury, K. Latif, G. J. Kidron, L. Consorti, R. A. Armstrong, C. Gibson, R. Schild   +8 more
doaj   +1 more source