Results 41 to 50 of about 78,844 (253)
The refractory-to-ice mass ratio in comets
Monthly notices of the Royal Astronomical Society, 2018 We review the complex relationship between the dust-to-gas mass ratio usually estimated in the material lost by comets, and the Refractory-to-Ice mass ratio inside the nucleus, which constrains the origin of comets.
M. Fulle +8 more
semanticscholar +1 more source
Chemical Convection and Stratification in the Earth's Outer Core
Frontiers in Earth Science, 2019 Convection in the Earth's outer core is driven by buoyancy sources of both thermal and compositional origin. The thermal and compositional molecular diffusivities differ by several orders of magnitude, which can affect the dynamics in various ways.
Mathieu Bouffard +3 more
doaj +1 more source
MUPUS insertion device for the Rosetta mission
Journal of Telecommunications and Information Technology, 2023 An original mechanical device designed to insert a penetrator into a cometary nucleus in an almost gravityfree environment is described. The device comprises a hammer and a power supply system that stores electrical energy in a capacitor.
Jerzy Grygorczuk +3 more
doaj +1 more source
COLOR SYSTEMATICS OF COMETS AND RELATED BODIES [PDF]
, 2015 Most comets are volatile-rich bodies that have recently entered the inner solar system following long-term storage in the Kuiper belt and the Oort cloud reservoirs. These reservoirs feed several distinct, short-lived “small body” populations.
D. Jewitt
semanticscholar +1 more source
Comets as collisional fragments of a primordial planetesimal disk [PDF]
, 2015 The Rosetta mission and its exquisite measurements have revived the debate on whether comets are pristine planetesimals or collisionally evolved objects.
A. Morbidelli, H. Rickman
semanticscholar +1 more source
The Composition of Comets [PDF]
, 2015 This paper is the result of the International Cometary Workshop, held in Toulouse, France in April 2014, where the participants came together to assess our knowledge of comets prior to the ESA Rosetta Mission. In this paper, we look at the composition of
A. Cochran +12 more
semanticscholar +1 more source
The activity characteristics and mechanisms of long-period comets
Earth and Planetary PhysicsComets are small celestial bodies orbiting around the Sun. They are remnants left over from the formation of the solar system; their interiors store original material of the planetary disk within the solar system. They are thus "fossils" for studying the
YingQi Wu +3 more
doaj +1 more source
Amplification on Undirected Population Structures: Comets Beat Stars
Scientific Reports, 2017 The fixation probability is the probability that a new mutant introduced in a homogeneous population eventually takes over the entire population.
Andreas Pavlogiannis +3 more
semanticscholar +1 more source