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The Quadrantid meteor shower is among the strongest annual meteor showers, and has drawn the attention of scientists for several decades. The stream is unusual, among others, for several reasons: its very short duration around maximum…

地球与行星天体物理 · 物理学 2015-09-16 Abedin Abedin , Pavel Spurny , Paul Wiegert , Petr Pokorny , Jiri Borovicka , Peter Brown

Small asteroids intersecting Earth's orbit can deliver extraterrestrial rocks to the Earth, called meteorites. This process is accompanied by a luminous phenomena in the atmosphere, called bolides or fireballs. Observations of bolides…

地球与行星天体物理 · 物理学 2016-08-31 Jiří Borovička , Pavel Spurný , Peter Brown

The Virginid meteoroid streams produce a series of meteor showers active annually during February-May. A certain parent comet is not found but a related association of some showers with near-Earth asteroids was previously established and a…

地球与行星天体物理 · 物理学 2023-05-26 G. I. Kokhirova , A. I. Zhonmuhammadi , U. H. Khamroev , T. J. Jopek

The Sari\c{c}i\c{c}ek howardite meteorite shower consisting of 343 documented stones occurred on 2 September 2015 in Turkey and is the first documented howardite fall. Cosmogenic isotopes show that Sari\c{c}i\c{c}ek experienced a complex…

A considerable portion of near-Earth objects could have come from the trans-Neptunian belt. Some of them have aphelia deep inside Jupiter's orbit during more than 1 Myr.

天体物理学 · 物理学 2011-08-19 S. I. Ipatov

High temperature impact melt breccias from the Rochechouart (France) meteorite crater record magnetization component with antipodal, normal and reverse polarities. The corresponding paleomagnetic pole for this component lies between the 220…

地球物理 · 物理学 2007-05-23 Laurent Carporzen , Stuart A. Gilder

In 1980, Alvarez and colleagues proposed that, in the transition from the Cretaceous to Paleogene, a large impactor collided with Earth being the cause of the mass extinction occurred at the limit K / Pg. In 1980 there was no known impact…

地球与行星天体物理 · 物理学 2014-03-26 Hector Javier Durand-Manterola , Guadalupe Cordero-Tercero

Kuiper belt objects, such as Arrokoth, the probable progenitors of short-period comets, formed and evolved at large heliocentric distances, where the ambient temperatures appear to be sufficiently low for preserving volatile ices. By…

地球与行星天体物理 · 物理学 2023-04-19 Adam Parhi , Dina Prialnik

Understanding the co-evolution of complex life with Earth's geology is an enduring challenge. The rock record evidences remarkable correlations between changes in biology and the wider Earth system, yet cause and effect remain unclear.…

地球与行星天体物理 · 物理学 2023-12-15 Craig R. Walton , Oliver Shorttle

A major revision of the geological timescale was published in 2012. We re-examine our past finding of a 27 Myr periodicity in marine extinction rates by re-assigning dates to the extinction data used previously. We find that the spectral…

地球与行星天体物理 · 物理学 2013-07-22 Adrian L. Melott , Richard K. Bambach

The search of a rational explanation of eclipses pervades the beginnings of philosophical and scientific thought. Within this intellectual frame, the knowledge of the "saros cycle" (a cycle of 18 years, 10 or 11 days and 1/3 of a day that…

物理学史与哲学 · 物理学 2013-04-30 Roberto Casazza , Alejandro Gangui

A tau-Herculid meteor outburst or even a storm was predicted by several models to occur around 5~UT on 31~May, 2022 as a consequence of the break-up of comet 73P/Schwassmann-Wachmann 3 in 1995. The multi-instrument and multi-station…

Comet 157P is a faint object with a history of being prone to unfortunate situations, circumstances, and/or coincidences. Several weeks after its 1978 discovery the comet disappeared and remained lost nonstop for twenty five years.…

地球与行星天体物理 · 物理学 2023-09-06 Zdenek Sekanina

The fate of hot Jupiters is thought to be engulfment by their host stars, the outcome of tidal orbital decay. Transit timing has revealed a few systems with apparently shrinking orbital periods, but such signals can be mimicked by light…

地球与行星天体物理 · 物理学 2025-11-20 Joshua N. Winn , Guðmundur Stefánsson

It has recently been suggested that a gravitational transition of the effective Newton's constant $G_{\rm eff}$ by about 10%, taking place 50-150 Myrs ago, can lead to the resolution of both the Hubble crisis and the growth tension of the…

地球与行星天体物理 · 物理学 2022-01-28 Leandros Perivolaropoulos

With the same general purposes as Part I of this monograph, we analyze here major events in the history of the Earth, such as the formation of the Earth itself, the origin of life, the great glaciations and the mass extinctions of species,…

地球与行星天体物理 · 物理学 2025-08-26 Carlos Alberto Olano

This paper discusses advance of the research on Speleothem Paleoluminescence Records of Environmental Changes after it have been first introduced by the author 20 years ago. It is demonstrated that most of the progress in this field was…

地球物理 · 物理学 2009-09-09 Yavor Y. Shopov

This paper discusses a recently proposed scenario of a climate-induced Collapse of the Eastern Mediterranean in the 11th century AD. It demonstrates that such a scenario cannot be maintained when confronted with proxy data from various…

物理与社会 · 物理学 2017-05-12 Johannes Preiser-Kapeller

The evolution of planetary systems around white dwarfs is crucial to understanding the presence of planetary material in the atmospheres of white dwarfs. These systems uniquely probe exoplanetary compositions. Periodic signals in the…

地球与行星天体物理 · 物理学 2025-06-26 Yuqi Li , Amy Bonsor , Oliver Shorttle , Laura K. Rogers

Meteoroids of a low-inclination stream hit the Earth arriving from a direction near the ecliptic. The radiant area of stream like this is often divided into two parts: one is situated northward and the other southward of the ecliptic. In…

地球与行星天体物理 · 物理学 2023-07-05 L. Neslušan , T. J. Jopek , R. Rudawska , M. Hajduková , G. Kokhirova