Results 71 to 80 of about 811,965 (260)
Extreme color–magnitude variability: Connection to changing-look active galactic nuclei
Astronomy & AstrophysicsContext. Changing-look active galactic nuclei (CL-AGNs) challenge the unified model of AGNs and offer key insights into the physics of the accretion processes of super-massive black holes.
Zhu Litao +7 more
doaj +1 more source
Fill in the blanks in the parameter space of observational astronomy. [PDF]
Innovation (Camb), 2023 Qian L.
europepmc +1 more source
, 2001 Astronomers study light and basically, almost everything we know about the universe has been figured out through the study of light gathered by telescopes on the earth, in the earth's atmosphere, and in space.
DeVincenzi, D., Ennico, Kimberly
core
Synthesis of Bulk Superconducting LiNbO2 Crystals Through CaH2 Reduction
Advanced Materials, EarlyView.CaH2 reduction reconstructively transforms insulating LiNbO3 single crystals into superconducting bulk LiNbO2 with a critical temperature of Tc = 14.4 K. Scanning electron microscopy reveals large‐volume, high‐yield phase conversion. Magnetization measurements demonstrate a robust ∼ 77% Meissner shielding fraction, establishing bulk superconductivity ...
Ryan Paxson +19 more
wiley +1 more source
A Guide for the Teaching of Astronomy in the Elementary School
, 1967 It is the purpose of this thesis to (1) present a guide for the teaching of astronomy in the upper elementary grades; (2) review basic concepts and subject matter in astronomy; (3) present current astronomical information; (4) present astronomy work ...
Sacharow, Allan
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Chiral Phonon–Driven Ultrafast Spin Currents in a Non‐Magnetic Ferroelectric
Advanced Materials, EarlyView.Broadband terahertz emission spectroscopy shows signatures of ultrafast spin‐current generation in non‐magnetic ferroelectric β$\beta$’‐In2Se3${\rm In}_2{\rm Se}_3$. Reversal of the emitted field upon sample inversion and substitution of Pt with W indicates spin‐Hall‐mediated charge conversion, while polarization‐resolved measurements reveal ...
Thomas B. Gill +16 more
wiley +1 more source
Development Of Astronomy Education In India
, 1997 Education in astronomy starts early in India. Science texts at prim.my, middle and secondary levels have units on astronomy. However, these units are generally skipped because the schools lack appropriate manpower and material.
Bhatia, V. B.
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Astronomy Education Research Down Under [PDF]
, 2005 A review of research conducted in Australasia into students' concept development in astronomy identifies a number of learning difficulties pertinent to astronomy, such as the lack of prior knowledge, intuitive or naive beliefs, juxtaposition and frames ...
Ginns, Ian S. +3 more
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Advanced Materials, EarlyView.Remote catalytic dehydrogenation enables the direct growth of monolayer amorphous carbon on a 2‐inch sapphire wafer by thermal CVD. Spatial separation of the catalyst from the growth substrate eliminates metallic residue and post‐growth processing, yielding a wafer‐scale uniform film with a random polygonal sp2‐hybridized carbon network that exhibits ...
Muhammad Sabbtain Abbas +8 more
wiley +1 more source
Astronomy, technology development and industry
, 2009 Astronomy is perhaps the best example of fundamental research aiming to increase our knowledge well beyond our human neighborhood. But astronomy is also a Big Science, which is partly technology-driven.
Laurent Vigroux
core +1 more source