Results 91 to 100 of about 50,771 (302)

Dynamics, Origin, and Activation of Main Belt Comets [PDF]

, 2009
The discovery of Main Belt Comets (MBCs) has raised many questions regarding the origin and activation mechanism of these objects. Results of a study of the dynamics of these bodies suggest that MBCs were formed in-situ as the remnants of the break-up of
Haghighipour, Hsieh, Nader Haghighipour, Nesvorný   +3 more
core   +1 more source

Satellites and Small Bodies With ALMA: Insights Into Solar System Formation and Evolution

AGU Advances, Volume 6, Issue 6, December 2025.
Abstract Our understanding of the formation and evolution of planetary systems has made major advances in the past decade. This progress has been driven in large part by the Atacama Large Millimeter/submillimeter Array (ALMA), which has given us an unprecedented view of solar system bodies themselves, and of the structure and chemistry of forming ...
Katherine de Kleer, Michael E. Brown, Martin Cordiner, Richard Teague   +3 more
wiley   +1 more source

Phyllosilicate Infrared Spectral Features as Tracers of Aqueous Alteration in CM Chondrites and Implications for Remote Sensing of Hydrated Asteroids

Journal of Geophysical Research: Planets, Volume 130, Issue 12, December 2025.
Abstract CM (Mighei‐type) carbonaceous chondrites host abundant OH/H2O‐bearing phyllosilicates formed from water‐rock reactions in primitive planetesimals. Their infrared (IR) spectral features resemble those of C‐type asteroids, making laboratory analyses of CMs essential for interpreting asteroid observations.
W. M. Lawrence, B. L. Ehlmann
wiley   +1 more source

Asteroid Mass Estimation by Mutual Perturbations During Close Encounters After Gaia Focused Product Release

The Astronomical Journal
Mutual perturbations between asteroids during close encounters allow the estimation of their masses using precise astrometric observations. We use all astrometry reported to the Minor Planet Center, high-precision astrometry from ESA’s Gaia Focused ...
Oscar Fuentes-Muñoz, Davide Farnocchia, Jon D. Giorgini, Ryan S. Park   +3 more
doaj   +1 more source

Chaotic diffusion of the Vesta family induced by close encounters with massive asteroids

, 2011
We numerically estimate the semi-major axis chaotic diffusion of the Vesta family asteroids induced by close encounters with 11 massive main belt asteroids : (1) Ceres, (2) Pallas, (3) Juno, (4) Vesta, (7) Iris, (10) Hygiea, (15) Eunomia, (19) Fortuna ...
Delisle, J. -B., Laskar, J.
core   +2 more sources

Evolution of Terrestrial Planetary Bodies and Implications for Habitability

Reviews of Geophysics, Volume 63, Issue 4, December 2025.
Abstract The terrestrial planetary bodies of our solar system—Mercury, Venus, Earth, and Mars—share a common origin through nebular accretion and early magma ocean differentiation, yet they diverged significantly in geological evolution, tectonic regimes, and habitability.
Peter A. Cawood, Eva E. Stüeken, Priyadarshi Chowdhury, Chris J. Hawkesworth, Jacob A. Mulder   +4 more
wiley   +1 more source

Ancient and primordial collisional families as the main sources of X-type asteroids of the inner main belt [PDF]

Astronomy & Astrophysics, 2019
Aims. The near-Earth asteroid population suggests the existence of an inner main belt source of asteroids that belongs to the spectroscopic X complex and has moderate albedos. The identification of such a source has been lacking so far. We argue that the
M. Delbo’, C. Avdellidou, A. Morbidelli   +2 more
semanticscholar   +1 more source

The effect of pressure on dihedral angle between liquid Fe‐S and orthopyroxene: Implication for percolative core formation in planetesimals and planetary embryos

Meteoritics &Planetary Science, Volume 60, Issue 12, Page 2811-2827, December 2025.
Abstract During precursor stages of planet formation, many planetesimals and planetary embryos are considered to have differentiated, forming an iron‐alloy core and silicate mantle. Percolation of liquid iron‐alloy in solid silicates is one of the major possible differentiation processes in these small bodies.
Takumi Miura, Hidenori Terasaki, Hyu Takaki, Kotaro Kobayashi, Geoffrey David Bromiley, Takashi Yoshino   +5 more
wiley   +1 more source

Impactor flux and cratering on Ceres and Vesta: Implications for the early Solar System [PDF]

, 2011
We study the impactor flux and cratering on Ceres and Vesta caused by the collisional and dynamical evolution of the asteroid Main Belt. We develop a statistical code based on a well-tested model for the simultaneous evolution of the Main Belt and NEA ...
Asphaug, Baer, Belton, Benz, Binzel, Bogard, Bottke, Bottke, Bottke, Chapman, Croft, de Elía, Farinella, G. C. de Elía, Holsapple, Holsapple, Housen, McCord, McCord, Melosh, O’Brien, O’Brien, Petit, R. P. Di Sisto, Richardson, Schmidt, Stuart, Tanga, Thomas, Thomas, Thomas, Tsiganis, Veverka, Zolotov   +33 more
core   +3 more sources

Physicochemical Constraints on the Abiotic Polymerization of Nucleotides Into RNA

Journal of Geophysical Research: Biogeosciences, Volume 130, Issue 11, November 2025.
Abstract One of the key steps in the origin of life is the polymerization of nucleotides into nucleic acids like RNA. We have quantified the energetic impact of temperature, pressure, and composition on the polymerization of nucleotides into RNA using the Gibbs function. These Gibbs energies have been used to calculate the probability that a nucleotide
D. E. LaRowe, J. M. Dick
wiley   +1 more source