Results 101 to 110 of about 7,944 (214)

Evolution of carbonaceous chondrite parent bodies: Insights into cometary nuclei [PDF]

It is thought that cometary samples will comprise the most primitive materials that are able to be sampled. Although parent body alteration of such samples would not necessarily detract from scientists' interest in them, the possibility exists that ...
Mcsween, Harry Y., Jr.
core   +1 more source

Constraining the Effects of Pre- and Post-accretionary Processes on Ryugu Insoluble Organic Matter

The Astrophysical Journal
Asteroidal and cometary fragments have been indicated as possible sources of the building blocks of life for the early Earth. Samples returned from the asteroid Ryugu are uncontaminated and contain organic matter.
Christian Potiszil, Masahiro Yamanaka, Tsutomu Ota, Chie Sakaguchi, Hiroshi Kitagawa, Ryoji Tanaka, Tak Kunihiro, Katsura Kobayashi, Eizo Nakamura   +8 more
doaj   +1 more source

Fumarolic-like activity on carbonaceous chondrite parent body. [PDF]

Sci Adv, 2020
Ganino C, Libourel G.
europepmc   +1 more source

Recurrent planetesimal formation in an outer part of the early solar system

Scientific Reports
The formation of planets in our solar system encompassed various stages of accretion of planetesimals that formed in the protoplanetary disk within the first few million years at different distances to the sun.
Wladimir Neumann, Ning Ma, Audrey Bouvier, Mario Trieloff   +3 more
doaj   +1 more source

The Polonnaruwa meteorite: oxygen isotope, crystalline and biological composition

, 2013
Results of X-Ray Diffraction (XRD) analysis, Triple Oxygen Isotope analysis and Scanning Electron Microscopic (SEM) studies are presented for stone fragments recovered from the North Central Province of Sri Lanka following a witnessed fireball event on ...
Gibson, Carl H., Hoover, Richard B., Miyake, Nori, Oldroyd, Andrew, Samaranayake, Anil, Wallis, Daryl H., Wallis, Jamie, Wallis, M. K., Wickramarathne, K., Wickramasinghe, N. C.   +9 more
core  

Al-Mg systematics of hibonite-bearing Ca,Al-rich inclusions from Ningqiang [PDF]

, 2011
Hibonite-bearing Ca,Al-rich inclusions (CAIs) usually occur in CM and CH chondrites and possess petrographic and isotopic characteristics distinctive from other typical CAIs.
Guan, Yunbin, Hsu, Weibiao, Wang, Ying
core  

Large Carbonaceous Chondrite Parent Bodies Favored by Abundance–Volatility Modeling: A Possible Chemical Signature of Pebble Accretion

The Planetary Science Journal
Primitive meteorite groups such as the Vigarano, Mighei, and Karoonda carbonaceous chondrites have enigmatic patterns of elemental abundances, with moderately volatile elements—those that transition from vapor to condensate between ∼400 and ∼900 K ...
Jeremy W. Boyce, Francis M. McCubbin, Nicole Lunning, Tyler Anderson   +3 more
doaj   +1 more source

A primordial ¹⁵N-depleted organic component detected within the carbonaceous chondrite Maribo. [PDF]

Sci Rep, 2020
Vollmer C, Leitner J, Kepaptsoglou D, Ramasse QM, King AJ, Schofield PF, Bischoff A, Araki T, Hoppe P.   +8 more
europepmc   +1 more source

Meteoritic Evidence for a Ceres-sized Water-rich Carbonaceous Chondrite Parent Asteroid. [PDF]

Nat Astron, 2020
Hamilton VE, Goodrich CA, Treiman AH, Connolly HC, Zolensky ME, Shaddad MH.   +5 more
europepmc   +1 more source

The evolution of organic material on Asteroid 162173 Ryugu and its delivery to Earth

Nature Communications
The recent return of samples from asteroid 162173 Ryugu provides a first insight into early Solar System prebiotic evolution from known planetary bodies. Ryugu’s samples are CI chondrite-like, rich in water and organic material, and primarily composed of
H. G. Changela, Y. Kebukawa, L. Petera, M. Ferus, E. Chatzitheodoridis, L. Nejdl, R. Nebel, V. Protiva, P. Krepelka, J. Moravcova, R. Holbova, Z. Hlavenkova, T. Samoril, J. C. Bridges, S. Yamashita, Y. Takahashi, T. Yada, A. Nakato, K. Sobotkova, H. Tesarova, D. Zapotok   +20 more
doaj   +1 more source