Results 71 to 80 of about 20,127 (260)

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

Precise Orbit Determination of Mars-crossing Asteroids

The Astronomical Journal
This study investigates the orbit determination of the Mars-crossing asteroids (MCAs) with a focus on the possibility of detecting their Yarkovsky signals. We analyze the influences of force model uncertainties on MCA orbits, including the uncertainty of
Xin Liu, Xi-Yun Hou, Jun Yao, Shanhong Liu, Roberto Armellin, Qingbo Gan, Zhitao Yang   +6 more
doaj   +1 more source

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

Photometry and Polarimetry of 2010 XC15: Observational Confirmation of E-type Near-Earth Asteroid Pair

The Astrophysical Journal, 2023
Asteroid systems such as binaries and pairs are indicative of the physical properties and dynamical histories of small solar system bodies. Although numerous observational and theoretical studies have been carried out, the formation mechanism of asteroid
Jin Beniyama, Shigeyuki Sako, Katsuhito Ohtsuka, Tomohiko Sekiguchi, Masateru Ishiguro, Daisuke Kuroda, Seirato Urakawa, Fumi Yoshida, Asami Takumi, Natsuho Maeda, Jun Takahashi, Seiko Takagi, Hiroaki Saito, Tatsuya Nakaoka, Tomoki Saito, Tomohito Ohshima, Ryo Imazawa, Masato Kagitani, Satoshi Takita   +18 more
doaj   +1 more source

On the formation and evolution of asteroid belts and their potential significance for life

, 2012
Suggestions have been made that asteroid belts may be important both for the existence of life and perhaps even for the evolution of complex life on a planet. Using numerical models for protoplanetary discs we calculate the location of the snow line, and
Livio, Mario, Martin, Rebecca G.
core   +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

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

The Challenge of Measuring Asteroid Masses with Gaia DR2 Astrometry

The Planetary Science Journal, 2023
The Gaia second data release (DR2) contains high-accuracy astrometric measurements of thousands of solar system bodies. These measurements raise the possibility of determining asteroid masses by modeling scattering events between massive objects observed
Zachary Murray
doaj   +1 more source

Diffusion in the asteroid belt [PDF]

Proceedings of the International Astronomical Union, 2004
In the beginning we review briefly the evolution of the ideas on the motion of the bodies in our solar system, from Newton's clockwork Universe to the presently accepted ubiquity of chaotic transport in the asteroid belt. Then we discuss the result of chaotic motion, which is transport in phase space, and we introduce the concept of diffusion of an ...
openaire   +1 more source

Polarimetric survey of main-belt asteroids [PDF]

Astronomy & Astrophysics, 2019
Aims.We present the results of a polarimetric survey of main-belt asteroids at Complejo Astronómico El Leoncito (CASLEO), San Juan, Argentina. The aims of this survey are to increase the database of asteroid polarimetry and to estimate the diversity in the polarimetric properties of asteroids.Methods.The survey began in 1995 and a second period began ...
C. López-Sisterna, E. García-Migani, R. Gil-Hutton   +2 more
openaire   +1 more source