Results 51 to 60 of about 4,877 (221)
The Planetary Science JournalComets, as remnants of the solar system’s formation, vary in volatile-refractory content. In situ comet studies, such as the Rosetta mission to 67P/Churyumov–Gerasimenko, provide detailed volatile composition insights, while ground-based studies offer ...
Mohammad Saki +7 more
doaj +1 more source
Streaming clumps ejection model and the heterogeneous inner coma of Comet Wild 2 [PDF]
, 2004 It is modeled that a significant component of the jets of some comets are released as aggregate clumps, which then fragment and shed particles after release, leading to a heterogeneous innermost ...
Clark, B. C. +4 more
core
What drives the dust activity of comet 67P/Churyumov-Gerasimenko?
, 2015 We use the gravitational instability formation scenario of cometesimals to derive the aggregate size that can be released by the gas pressure from the nucleus of comet 67P/Churyumov-Gerasimenko for different heliocentric distances and different volatile ...
Blum, J. +3 more
core +1 more source
Mountain‐top spherules: Criteria to identify natural and synthetic particles
Meteoritics &Planetary Science, EarlyView.Abstract Natural microspherules are important tracers of geologic and environmental processes in modern and ancient deposits. However, anthropogenic contamination can dilute natural collections by releasing synthetic microspherules into the environment.
M. R. Boyd, M. J. Genge
wiley +1 more source
The Planetary Science JournalObserving [O i ] emission to calculate an oxygen line ratio has been proposed as a potential proxy for direct CO _2 measurement in comets. However, the photochemistry governing [O i ] release into the coma is not well understood, and using theoretical ...
Ella J. Mayfield +3 more
doaj +1 more source
Obesity Reviews, EarlyView.ABSTRACT Introduction This scoping review aims to identify all outcomes reported in school‐based obesity prevention interventions in childhood. It serves as an essential first step towards developing an internationally agreed‐upon Core Outcome Set (COS), which defines what should be measured in all school‐based childhood obesity prevention studies ...
Teatske M. Altenburg +14 more
wiley +1 more source
Constraints from Comets on the Formation and Volatile Acquisition of the Planets and Satellites [PDF]
Space Science Reviews, 2015 Comets play a dual role in understanding the formation and evolution of the solar system. First, the composition of comets provides information about the origin of the giant planets and their moons because comets formed early and their composition is not expected to have evolved significantly since formation.
Mandt, K. E. +6 more
openaire +4 more sources
Comet 9P/Tempel 1: Interpretation with the Deep Impact Results
, 2008 According to our common understandings, the original surface of a short-period comet nucleus has been lost by sublimation processes during its close approaches to the Sun. Sublimation results in the formation of a dust mantle on the retreated surface and
Croft S. K. +9 more
core +1 more source
Local manifestations of cometary activity [PDF]
, 2019 Comets are made of volatile and refractory material and naturally experience various degrees of sublimation as they orbit around the Sun. This gas release, accompanied by dust, represents what is traditionally described as activity.
El-Maarry, Ramy +7 more
core +2 more sources
Chemical Exposures, DNA Methylation and Whole Blood DNA Damage in Pet Golden Retrievers
Veterinary and Comparative Oncology, EarlyView.ABSTRACT Canine multicentric lymphoma (CL) is a common and typically fatal cancer among dogs. Although certain breeds have a higher incidence of CL, its environmental risk factors remain uncertain. Exposures to herbicides and volatile organic compounds (VOCs) associate with non‐Hodgkin lymphoma in people.
Ashleigh N. Tindle +6 more
wiley +1 more source