Results 211 to 220 of about 298,499 (308)

Implications of cosmologically coupled black holes for pulsar timing arrays. [PDF]

Sci Rep
Calzà M, Gianesello F, Rinaldi M, Vagnozzi S.   +3 more
europepmc   +1 more source

Kinetic Structure of an Interplanetary Shock Observed at Two Heliocentric Longitudes

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract Collisionless shocks convert bulk flow energy into heat, electromagnetic fields, and non‐thermal particle populations. Recent studies suggest that downstream magnetic oscillations could play an important role in ion‐scale energy dissipation at low‐Mach‐number shocks; however, the specific shock and plasma parameters involved remain poorly ...
J. J. Boldú, D. B. Graham, M. Morooka, M. André, Yu. V. Khotyaintsev, A. Dimmock, A. Lalti, D. Píša, J. Souček, M. Maksimovic, P. Louarn, A. Fedorov, C. J. Owen   +12 more
wiley   +1 more source

Astrophysics and Cosmology [PDF]

, 1997
openaire   +1 more source

Apatite in Bennu samples indicates multiple stages of aqueous alteration

Meteoritics &Planetary Science, Volume 61, Issue 3, Page 504-521, March 2026.
Abstract Calcium phosphates are ubiquitous in planetary materials, including samples returned from asteroid Bennu by the OSIRIS‐REx mission. We characterized apatite [Ca5(PO4)3(F,Cl,OH)] grains in Bennu samples by scanning electron microscopy, electron microprobe analysis, and transmission electron microscopy to investigate their compositions, mineral ...
Laura B. Seifert, T. M. Erickson, L. P. Keller, J. J. Barnes, K. Thomas‐Keprta, L. Le, J. Gorce, Z. Rahman, T. J. Zega, H. C. Connolly Jr, D. S. Lauretta   +10 more
wiley   +1 more source

Counting Cosmic Cycles: Past Big Crunches, Future Recurrence Limits, and the Age of the Quantum Memory Matrix Universe. [PDF]

Entropy (Basel)
Neukart F, Marx E, Vinokur V.
europepmc   +1 more source

Geochemical and petrographic re‐evaluation of ungrouped iron meteorites from Western Australia

Meteoritics &Planetary Science, Volume 61, Issue 3, Page 444-465, March 2026.
Abstract Under the current classification scheme, ungrouped irons make up ~11% of all recognized iron meteorites. A further ~7% of iron meteorites are currently classified as simply “irons” and are yet to be fully classified. To potentially classify these meteorites, newer approaches, including either statistical modeling or advanced geochemical ...
Ashley Rogers, Lucy Forman, Kai Rankenburg, Rachel Kirby, Martin Danišík, Victoria Cousins, Gretchen K. Benedix   +6 more
wiley   +1 more source

Cosmic mysteries and the hydrogen 21-cm line: bridging the gap with lunar observations. [PDF]

Philos Trans A Math Phys Eng Sci
Fialkov A, Gessey-Jones T, Dhandha J.
europepmc   +1 more source

Shock metamorphic effects in Itokawa phosphates: A comparison with megaregolith‐derived meteorites

Meteoritics &Planetary Science, Volume 61, Issue 3, Page 351-370, March 2026.
Abstract Returned regolith samples from the asteroid Itokawa provide a unique opportunity to compare shock metamorphic effects in unconsolidated regolith materials with those preserved in lithified meteorites, that is, megaregolith. We analyzed four Itokawa particles (Ueda—RA‐QD02‐0519, Narahara—RA‐QD02‐0573, Domon—RA‐QD02‐0588, Ishiuchi—RX‐MD03‐0212 ...
E. Dobrică, A. N. Krot, A. J. Brearley
wiley   +1 more source

Radiometer calibration using machine learning. [PDF]

Sci Rep
Leeney SAK, Bevins HTJ, Acedo EL, Handley WJ, Kirkham C, Patel RS, Zhu J, Molnar D, Cumner J, Anstey D, Artuc K, Bernardi G, Bucher M, Carey S, Cavillot J, Chiello R, Croukamp W, de Villiers DIL, Ely JA, Fialkov A, Gessey-Jones T, Kulkarni G, Magro A, Meerburg PD, Mittal S, Pattison JHN, Pegwal S, Pieterse CM, Pritchard JR, Puchwein E, Razavi-Ghods N, Roque ILV, Saxena A, Scheutwinkel KH, Scott P, Shen E, Sims PH, Spinelli M.   +37 more
europepmc   +1 more source

Moon's volcanic history revealed in glassy spherules from Apollo 17 soil 76501

Meteoritics &Planetary Science, Volume 61, Issue 3, Page 389-404, March 2026.
Abstract Rapidly quenched droplets of pyroclastically erupted lava are common in lunar regolith at landing sites proximal to the maria. Here, we document the U‐Pb chronologies, major element, and trace element compositions of picritic glassy particles from Apollo 17 regolith sample 76501. These particles are dominated by high‐Ti compositions similar to
Alexander A. Nemchin, Marc D. Norman, Martin J. Whitehouse, Evgenia Salin, Nicholas E. Timms, Tao Long, Xiaochao Che, Renaud Merle, Fred Jourdan, Tao Luo   +9 more
wiley   +1 more source