Results 81 to 90 of about 30,236 (236)

On the Early Thermal Processing of Planetesimals during and after the Giant Planet Instability

The Planetary Science Journal
Born as ice-rich planetesimals, cometary nuclei were gravitationally scattered onto their current orbits in the Kuiper Belt and the Oort Cloud during the giant planets’ dynamical instability in the early stages of our solar system’s history.
Anastasios Gkotsinas, David Nesvorný, Aurélie Guilbert-Lepoutre, Sean N. Raymond, Nathan Kaib   +4 more
doaj   +1 more source

A study of the orbital evolution of 10 short-period comets by solving differential equations of motion obtained on the basis of a new principle of interaction

Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2007
The research of the orbital evolution of 10 short-period comets on the time interval of 400 years (1800–2200) is made by solving the differential equations of motion based on the new principle of mutual interaction of material bodies.
A. F. Zausaev
doaj   +1 more source

Untreated Hair Dye Effluents Enter the Environment: Are They a Threat to Human Health?

Environmental Toxicology, EarlyView.
ABSTRACT The effluents generated during the process of hair dyeing exhibit a complex composition, comprising chemical compounds with varying toxicity levels. While the adverse impact of hair dyes on human health is acknowledged, there is a notable absence of studies addressing the toxicity associated with effluents produced during these activities. The
Letícia Cristina Gonçalves, Matheus Mantuanelli Roberto, Adriana Fabiana Corrêa da Silva, Maria Aparecida Marin‐Morales   +3 more
wiley   +1 more source

How Long-lived Grains Dominate the Shape of the Zodiacal Cloud

The Planetary Science Journal
Grain–grain collisions shape the three-dimensional size and velocity distribution of the inner Zodiacal Cloud and the impact rates of dust on inner planets, yet they remain the least understood sink of zodiacal dust grains. For the first time, we combine
Petr Pokorný, Althea V. Moorhead, Marc J. Kuchner, Jamey R. Szalay, David M. Malaspina   +4 more
doaj   +1 more source

The NEOWISE-Discovered Comet Population and the CO+CO_2 production rates [PDF]

, 2015
The 163 comets observed during the WISE/NEOWISE prime mission represent the largest infrared survey to date of comets, providing constraints on dust, nucleus size, and CO + CO_2 production.
Bauer, James M., Blair, Nathan, Cutri, Roc M., Dailey, John W., Fernandez, Yan R., Grav, Tommy, Kramer, Emily, Lisse, C. M., Lucas, Andrew, Mainzer, A. K., Masci, Frank J., Masiero, Joseph R., McMillan, Robert S., Meech, Karen J., Nugent, Carrie R., Sonnett, Sarah, Stevenson, Rachel, Walker, Russell, Weissman, Paul R., Wright, Edward L.   +19 more
core   +1 more source

Cytogenotoxic Effects of Fluopyram in Allium cepa Root Cells Involving Microtubule Disruption

Environmental Toxicology, EarlyView.
ABSTRACT Fluopyram is a next‐generation fungicide widely used in agriculture; however, its persistence in soils and mobility toward aquatic systems have raised concerns regarding potential ecotoxicological risks. This study evaluated the cytogenotoxic effects of a commercial fluopyram‐based pesticide formulation on Allium cepa root meristem cells ...
Carlos Filipe Camilo‐Cotrim, Natanael Alves da Silva, Gabriela Gomes Lima, Igor Rodrigues Vasconcelos, Luciana Souza Ondei, Elisa Flávia Luiz Cardoso Bailão, Antônio Sérgio Nakao de Aguiar, Marcelino Benvindo‐Souza, Leonardo Luiz Borges, Virgínia Damin, Luciane Madureira Almeida   +10 more
wiley   +1 more source

Nongravitational Forces in Planetary Systems

The Planetary Science Journal
Nongravitational forces play surprising and, sometimes, centrally important roles in shaping the motions and properties of small planetary bodies. In the solar system, the morphologies of comets, the delivery of meteorites, and the shapes and dynamics of
David Jewitt
doaj   +1 more source

How to make a comet [PDF]

The primary mandate of NASA is the study of the nature and origin of the solar system. The study of the comets provide information about conditions and processes at the beginning of the solar system.
Fanale, Fraser, Saunders, R. Stephen, Stephens, James   +2 more
core   +2 more sources

A simple bound for the variation at closest approach of a small body and star due to general relativity

, 2014
As a comet, asteroid or planet approaches its parent star, the orbit changes shape due to the curvature of spacetime. For comets in particular, the deviation at the pericentre may noticeably change their ephemerides and affect the dynamics of outgassing,
Veras, Dimitri
core   +1 more source

Psychedelic‐assisted treatment for substance use disorder: A narrative systematic review

Addiction, EarlyView.
Abstract Background and aims This is the first systematic review of the extant literature on all major psychedelic‐assisted treatment for alcohol use disorder (AUD), tobacco use disorder (TUD) and other substance use disorders (SUD). We aimed to summarise the evidence for efficacy of psychedelic‐assisted treatment for AUD, TUD, and SUD; to evaluate its
Theodore Piper, Francesca Small, Sam Brown, Michael Kelleher, Luke Mitcheson, James Rucker, Allan H. Young, John Marsden   +7 more
wiley   +1 more source