Results 61 to 70 of about 6,945 (227)
Journal for the Theory of Social Behaviour, Volume 55, Issue 4, December 2025.ABSTRACT Humanity seems stuck on different ways to fail to meet the challenge posed by a declared climate emergency and manifest problems of ecological breakdown. Rather than reprise these failures, we use the Fermi Paradox and simulation hypothesis to make a simple point about agency. The argument unfolds in two sections.
Jamie Morgan
wiley +1 more source
Mapping the dynamics, star-formation rates, and chemical properties of galaxies with integral field spectroscopy [PDF]
, 2005 Major advances in the development of instruments for eight and ten meter class telescopes are revolutionising our understanding of galaxy formation. In particular, Integral Field Spectrographs (which produce a three dimensional {x, y, velocity) map of a ...
Swinbank, Anthony Mark +1 more
core
PEARLS: Near-infrared Photometry in the JWST North Ecliptic Pole Time Domain Field
The Astrophysical Journal Supplement Series, 2023 We present near-infrared (NIR) ground-based Y , J , H , and K imaging obtained in the James Webb Space Telescope (JWST) North Ecliptic Pole Time Domain Field (NEP TDF) using the MMT-Magellan Infrared Imager and Spectrometer on the MMT.
Christopher N. A. Willmer +25 more
doaj +1 more source
On the Optimization of Broadband Photometry for Galaxy Evolution Studies [PDF]
The Astronomical Journal, 2002 20 pages, 9 postscript figures, 3 tables, accepted for publication in ...
Gil De Paz, Armando, Madore, B. F.
openaire +3 more sources
Astronomische Nachrichten, Volume 346, Issue 9, November 2025.ABSTRACT We present James Webb Space Telescope observations of M 4—the closest globular cluster—that probe the lower Main Sequence down to the hydrogen‐burning limit. The unveiled stellar sequence reaches much fainter luminosities than previously possible, revealing a few extremely red objects that are consistent with brown dwarfs as cool as Teff∼1000K$
L. R. Bedin +10 more
wiley +1 more source
WISE Photometry of Galaxies within 10 Mpc
The Astronomical JournalFor photometry of galaxies in the infrared that extend to very low surface brightnesses, it is necessary to observe with telescopes in space. The Wide-field Infrared Survey Explorer (WISE) and NEOWISE provide sensitive all-sky access to mid-infrared flux
R. Brent Tully +2 more
doaj +1 more source
HEAD IN THE STARS, FEET ON THE GROUND: Scale and Astronomy Initiatives in Southern Africa
Cultural Anthropology, Volume 40, Issue 4, Page 571-596, November 2025.ABSTRACT This article explores the evolution of radio astronomy in South Africa and Madagascar, focusing on how “scale” functions as both a way of understanding the world and marking differences in existence. In outer space research, the ground is crucial but often overlooked.
HANNA NIEBER, DAVIDE CHINIGÒ
wiley +1 more source
The nature and origin of disky elliptical galaxies [PDF]
, 2002 The observational trend that disky elliptical galaxies exhibit younger luminosity- weighted ages than boxy ellipticals is investigated. The presence of a possible young stellar disk embedded in these galaxies is explored by comparing kinematics derived ...
McDermid, Richard Morgan
core
A search for the most massive galaxies: double trouble? [PDF]
, 2005 We describe the results of a search for galaxies with large ({approx}> 350 kms{sup -1}) velocity dispersions. The largest systems we have found appear to be the extremes of the early-type galaxy population: compared to other galaxies with similar ...
York, D. G. +15 more
core +1 more source
JWST Photometry of Globular Cluster Populations in MACS0417.5−1154
The Astrophysical JournalDeep JWST imaging of the massive galaxy cluster MACS0417.5−1154, at redshift z = 0.443, reveals a huge population of globular clusters (GCs) and ultracompact dwarfs (UCDs) primarily distributed around its single central giant brightest cluster galaxy ...
William E. Harris +10 more
doaj +1 more source