Results 51 to 60 of about 292,162 (290)
Imagining the Heavens: Adam Elsheimer’s Flight into Egypt and the Renaissance Night Sky
Journal for the History of Knowledge, 2021 Adam Elsheimer’s The Flight into Egypt (1609) has triggered a longstanding debate among art historians. For the last five decades, Elsheimer’s novel naturalistic representation of the night sky in his painting on copper has been linked to Galileo’s ...
Stefan Zieme
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The Swift X-Ray Telescope [PDF]
SPIE Optics + Photonics, 1999 he Swift Gamma-Ray Explorer is designed to make prompt multiwavelength observations of gamma-ray bursts (GRBs) and GRB afterglows. The X-ray telescope (XRT) enables Swift to determine GRB positions with a few arcseconds accuracy within 100 s of the burst
D. Burrows +33 more
semanticscholar +1 more source
Journal of the Mechanical Behavior of Materials, 2018 Active optics techniques on large telescopes and astronomical instrumentations provide high imaging quality. For ground-based astronomy, the co-addition of adaptive optics again increases angular resolution up to providing diffraction-limited imaging at ...
Lemaitre Gérard Rene
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Activities of PMO optical space debris survey [PDF]
Anais da Academia Brasileira de CiênciasSpace debris division of PMO is devoted to play an important role in the research of orbital mechanics and the development of space debris observation techniques in China.
ZHANG CHEN, ZHAO CHANGYIN
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First M87 Event Horizon Telescope Results. II. Array and Instrumentation [PDF]
, 2019 The Event Horizon Telescope (EHT) is a very long baseline interferometry (VLBI) array that comprises millimeter- and submillimeter-wavelength telescopes separated by distances comparable to the diameter of the Earth. At a nominal operating wavelength of ~
K. Akiyama +339 more
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Chemie Ingenieur Technik, EarlyView., 2023 Let us consider an alternative perspective on climate change: The sum of solar radiation and heat generated by human activity result in a net energy input of 1.96 times that of the Sun on the Earth's surface. The expanding global population is expected to exacerbate this issue. Potential solutions are proposed, including replacement and heat recycling.
Martin Bertau, Gerald Steiner
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L’observatoire de Juvisy-sur-Orge, l’« univers d’un chercheur » à sauvegarder
In Situ, 2017 In 1882, Camille Flammarion was given a property at Juvisy-sur-Orge by one of his admirers. He transformed the house into an astronomical observatory and installed what was for its day advanced scientific equipment.
Colette Aymard, Laurence-Anne Mayeur
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The Swift Ultra-Violet/Optical Telescope [PDF]
SPIE Optics + Photonics, 2002 The Ultra-Violet/Optical Telescope (UVOT) is one of three instruments flying aboard the Swift Gamma-ray Observatory. It is designed to capture the early (∼1 min) UV and optical photons from the afterglow of gamma-ray bursts in the 170–600 nm band as well
P. Roming +24 more
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SPHERE: the exoplanet imager for the Very Large Telescope [PDF]
Astronomy & Astrophysics, 2019 Observations of circumstellar environments that look for the direct signal of exoplanets and the scattered light from disks have significant instrumental implications.
J. Beuzit +20 more
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Photonic Engineering Enables All‐Passive Upconversion Imaging with Low‐Intensity Near‐Infrared Light
Advanced Functional Materials, EarlyView.A passive upconversion imaging system enables the observation of scenes illuminated by low‐intensity incoherent near‐infrared light from 750 to 930 nm, by converting it into the visible without the use of external power. The upconverter is enabled by triplet–triplet annihilation in a bulk heterojunction, with absorption enhanced by plasmonic resonators
Rabeeya Hamid +13 more
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