Results 171 to 180 of about 754,035 (345)
On the structure and dynamics of galaxies [PDF]
, 1983 The dynamics of spiral galaxies is the main theme towards which the two other themes converge. Normal spiral galaxies are in uniform rotation around their nuclei. The kinematical and dynamical study of NGC 7793 from 21 Fabry-Perot interferograms in H alpha light confirms this. Barred spiral galaxies need more complex dynamical models.
openaire +2 more sources
Systematic Entomology, Volume 48, Issue 1, Page 178-197, January 2023., 2023 Phylogenetic relationships are reconstructed among the Liriomyza leafminers using phylogenomic analysis of nuclear gene loci obtained by anchored hybrid enrichment (AHE). Trees inferred using multiple data types and analysis methods are congruent and individual clade support confirms morphological species groups and relationships among them.
Jing‐Li Xuan +7 more
wiley +1 more source
Elliptical Galaxy Dynamics: The Issues Pertaining to Galaxy Formation [PDF]
arXiv, 1999 How elliptical galaxy dynamics relate to galaxy structure, stellar populations, spiral galaxies and environment are reviewed. The evidence assembled shows that most, if not all, galaxies originally classified as gE contain disks within them. Taken together, the existing evidence are most consistent with the gravitational, hierarchical, clustering ...
arxiv
Similarity Assessment of the Engineering Concepts: Decision‐Making Support and Metrics
Systems Engineering, EarlyView.ABSTRACT The new product development (NPD) process is a systematic approach to bring new products and innovations to market. Nowadays, this process is affected by a number of influencing factors associated with the fast‐paced technological changes. One of those factors is the distributed design nature of product development activities: team members are
Yaroslav Menshenin +3 more
wiley +1 more source
The Astrophysical JournalThe majority of disk galaxies manifest spirals and/or bars that are believed to result from dynamical instabilities. However, some galaxies have featureless disks, which are therefore inferred to be dynamically stable.
J. A. Sellwood, R. G. Carlberg
doaj +1 more source
Science Triggers and Situational Interest in Everyday Family Life
Journal of Research in Science Teaching, EarlyView.ABSTRACT Interest in science is critical for science learning. The family plays a major role in supporting the development of children's interest in science by eliciting and fostering interest and engagement with science content and practice. This study characterizes triggers for interest in science in everyday family life and measures the duration of ...
Irit Vivante, Dana Vedder‐Weiss
wiley +1 more source
Clusters and superclusters of galaxies [PDF]
arXiv, 1996 Rich clusters of galaxies are the most massive virialized systems known. Even though they contain only a small fraction of all galaxies, rich clusters provide a powerful tool for the study of galaxy formation, dark matter, large-scale structure, and cosmology.
arxiv
A Reassessment of the Structure of the Seyfert Galaxy NGC 4151 [PDF]
, 1973 R. D. Davies
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Tools for Learning—Promoting Reflection for Student Teachers' Development of PCK
Journal of Research in Science Teaching, EarlyView.ABSTRACT This paper investigates how the coherent integration of three different tools for reflection during a science methods course can contribute to student teachers' planning and enactment of science teaching, that is, their development of pedagogical content knowledge (PCK).
Pernilla Nilsson +1 more
wiley +1 more source
Studies of Rich Clusters of Galaxies – II: THE STRUCTURE AND LUMINOSITY FUNCTION OF THE CLUSTER A 1413 [PDF]
, 1974 T. B. Austin, J. V. Peach
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