Results 31 to 40 of about 14,057 (229)

Rendezvous in Space: Tech Diplomacy and the Commercial Space Era—A Study of Rendezvous and Docking Technologies and Space Exploration Co‐Operation Since the Cold War

Global Policy, EarlyView.
ABSTRACT On‐orbit rendezvous and docking constitute one of the most technically challenging activities in the history of space activities. As space endeavours mature to crewed missions, space rendezous and docking technologies (RDT) emerge as an area of technological innovation critical to advances in future crewed space exploration.
Nikita Chiu, Markus Kornprobst
wiley   +1 more source

The Complete Sample of Available SNe Ia Luminosity Calibrations from the TRGB Observed with either HST or JWST

The Astrophysical Journal
Distance ladders, which calibrate the luminosity of Type Ia supernovae (SNe Ia), currently provide the strongest constraints on the local value of H _0 . Recent studies from the Hubble Space Telescope (HST) and James Webb Space Telescope (JWST) show good
Siyang Li, Adam G. Riess, Gagandeep S. Anand, Dan Scolnic, Yukei S. Murakami, Dillon Brout, Erik R. Peterson   +6 more
doaj   +1 more source

The UNCOVER Survey: A First-look HST + JWST Catalog of 60,000 Galaxies near A2744 and beyond

The Astrophysical Journal Supplement Series, 2023
In 2022 November, the James Webb Space Telescope (JWST) returned deep near-infrared images of A2744—a powerful lensing cluster capable of magnifying distant, incipient galaxies beyond it.
John R. Weaver, Sam E. Cutler, Richard Pan, Katherine E. Whitaker, Ivo Labbé, Sedona H. Price, Rachel Bezanson, Gabriel Brammer, Danilo Marchesini, Joel Leja, Bingjie Wang, Lukas J. Furtak, Adi Zitrin, Hakim Atek, Iryna Chemerynska, Dan Coe, Pratika Dayal, Pieter van Dokkum, Robert Feldmann, Natascha M. Förster Schreiber, Marijn Franx, Seiji Fujimoto, Yoshinobu Fudamoto, Karl Glazebrook, Anna de Graaff, Jenny E. Greene, Stéphanie Juneau, Susan Kassin, Mariska Kriek, Gourav Khullar, Michael V. Maseda, Lamiya A. Mowla, Adam Muzzin, Themiya Nanayakkara, Erica J. Nelson, Pascal A. Oesch, Camilla Pacifici, Casey Papovich, David J. Setton, Alice E. Shapley, Heath V. Shipley, Renske Smit, Mauro Stefanon, Edward N. Taylor, Andrea Weibel, Christina C. Williams   +45 more
doaj   +1 more source

Dependence of the open-closed field line boundary in Saturn's ionosphere on both the IMF and solar wind dynamic pressure : comparison with the UV auroral oval observed by the HST [PDF]

, 2008
We model the open magnetic field region in Saturn's southern polar ionosphere during two compression regions observed by the Cassini spacecraft upstream of Saturn in January 2004, and compare these with the auroral ovals observed simultaneously in ...
Badman, S. V., Kalegaev, V.v., V. V. Kalegaev (7590551), Cowley, S. W. H., S. W. H. Cowley (7590302), Belenkaya, E. S., M. S. Blokhina (7614182), E. S. Belenkaya (7590545), S. V. Badman (7590704), Blokhina, M. S.   +9 more
core  

The First RELHIC? Cloud-9 is a Starless Gas Cloud

The Astrophysical Journal Letters
Five-hundred-meter Aperture Spherical Telescope observations have recently identified a compact H i cloud (hereafter Cloud-9) in the vicinity of the spiral galaxy M94.
Gagandeep S. Anand, Alejandro Benítez-Llambay, Rachael Beaton, Andrew J. Fox, Julio F. Navarro, Elena D’Onghia   +5 more
doaj   +1 more source

Predicting Nitrogen Isotope Fractionation in Nitrate Deposition on Early Mars

Journal of Geophysical Research: Planets, Volume 131, Issue 6, June 2026.
Abstract Noachian and early Hesperian Mars were likely warm and wet, with an atmosphere abundant in molecular nitrogen. The recent discovery of nitrate deposits in the Yellowknife Bay mudstones at Gale Crater confirm the existence of nitrogen oxides (NOX) on Noachian Mars. The processes responsible for the production of these nitrates would fractionate
J. Shawcross, D. J. Adams, M. L. Wong, K. J. Smith, Y. L. Yung   +4 more
wiley   +1 more source

Crowded No More: The Accuracy of the Hubble Constant Tested with High-resolution Observations of Cepheids by JWST

The Astrophysical Journal Letters, 2023
High-resolution James Webb Space Telescope (JWST) observations can test confusion-limited Hubble Space Telescope (HST) observations for a photometric bias that could affect extragalactic Cepheids and the determination of the Hubble constant.
Adam G. Riess, Gagandeep S. Anand, Wenlong Yuan, Stefano Casertano, Andrew Dolphin, Lucas M. Macri, Louise Breuval, Dan Scolnic, Marshall Perrin, Richard I. Anderson   +9 more
doaj   +1 more source

Jupiter's Auroral Ionosphere: Hybrid Monte Carlo, Auroral Spectrum and Conductivity Modeling

Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.
Abstract We present a new model of auroral precipitation and associated phenomena at Jupiter, called the Jupiter Auroral Ionosphere Code (JAIC). The hybrid model follows the primary electron population using a Monte Carlo code that runs on a GPU, and computes the contribution of the secondaries using a two‐stream approximation.
J. D. Nichols
wiley   +1 more source

Cassini observations of ion and electron beams at Saturn and their relationship to infrared auroral arcs [PDF]

, 2012
[1] We present Cassini Visual and Infrared Mapping Spectrometer observations of infrared auroral emissions from the noon sector of Saturn's ionosphere revealing multiple intense auroral arcs separated by dark regions poleward of the main oval.
T. Kimura (7025969), Badman, S. V., Kimura, T., Tao, C., Coates, AJ, S. V. Badman, Achilleos, Nick, C. S. Arridge, Melin, H, K.H. Baines (7600877), T. Stallard, Kasahara, S., N. Achilleos, Arridge, C. S., M.K. Dougherty (7598654), Bunce, EJ, Badman, S.V., T.S. Stallard (7600244), H. Melin, C.S. Arridge (7598645), Mitchell, D. G., G. Hospodarsky (7600883), Baines, KH, S.V. Badman (7600679), R.H. Brown (7600880), Badman, SV, Arridge, CS, S. Kasahara, Dougherty, M. K., Brown, RH, Cowley, S. W. H., Dougherty, M.K., Bunce, E. J., K. H. Baines, Arridge, Chris S., S. Kasahara (7600886), Fujimoto, M, Achilleos, N., Baines, K. H., C. Tao, S. W. H. Cowley, Mitchell, DG, H. Melin (7600241), R. H. Brown, D.G. Mitchell (7600691), Achilleos, N, M. Fujimoto (3243669), Hospodarsky, G, G. Hospodarsky, Bunce, E.J., Dougherty, MK, Hospodarsky, G., A. J. Coates, Kasahara, S, Stallard, T, Mitchell, D.G., M. K. Dougherty, Kimura, T, Brown, R.H., E.J. Bunce (7600682), Stallard, T., N. Achilleos (7600235), C. Tao (7600889), Coates, Andrew J., Fujimoto, M., Coates, A. J., Cowley, S.W.H., Tao, C, S.W.H. Cowley (7591226), Melin, H., Brown, R. H., T. Kimura, E. J. Bunce, A.J. Coates (7598648), Baines, K.H., Cowley, SWH, M. Fujimoto, D. G. Mitchell   +77 more
core   +1 more source

Mastcam‐Z Spectrophotometric Properties of Materials at the Van Zyl Overlook, Jezero Crater

Journal of Geophysical Research: Planets, Volume 131, Issue 6, June 2026.
Abstract During Sols 63–65 of Mars 2020, Mastcam‐Z multispectral (442–1022 nm) images were acquired at Van Zyl Overlook (VZO), spanning phase angles from ∼0° to 150°, to model photometric parameters for seven surface units. These units included rocks, soils, regolith, and rover tracks near the Jezero landing site.
B. Margara, J. R. Johnson, A. G. Hayes, M. T. Lemmon, W. M. Grundy, J. F. Bell III, M. N. Barrington   +6 more
wiley   +1 more source