Results 41 to 50 of about 83,260 (295)

Implementation of a Large-Area Diffractive Lens Using Multiple Sub-Aperture Diffractive Lenses and Computational Reconstruction

open access: yesPhotonics, 2022
Direct imaging systems that create an image of an object directly on the sensor in a single step are prone to many constraints, as a perfect image is required to be recorded within this step.
Shivasubramanian Gopinath   +10 more
doaj   +1 more source

SOFIA telescope [PDF]

open access: yesSPIE Proceedings, 2000
The SOFIA telescope as the heart of the observatory is a major technological challenge. I present an overview on the astro-nomical and scientific requirements for such a big airborne observatory and demonstrate the impact of these requirements on the layout of SOFIA, in particular on the telescope design as it is now.
openaire   +2 more sources

THE ASTRONOMICAL TELESCOPE [PDF]

open access: yesSchool Science and Mathematics, 1913
n ...
openaire   +2 more sources

The Measurement and Correction of Atmospheric Dispersion in 4-Meter Telescope With Adaptive Optical System

open access: yesIEEE Photonics Journal, 2023
Atmospheric dispersion is a wavelength-dependent effect that affects astronomical observations performed using ground-based telescopes. The effect of atmospheric dispersion for a 4-meter telescope is analyzed and an atmospheric dispersion corrector (ADC)
Guoqing Gao   +5 more
doaj   +1 more source

To Telescope or Not To Telescope?

open access: yesRobotic Telescopes, Student Research and Education Proceedings, Vol 1, No 1, 2018
With the rapidly growing number of Internet-accessible and Internet-controlled research-grade telescopes becoming available, astronomy educators are rushing to create authentic research-programs for students that leverage these new resources. To date, the most successful programs are those that focus on upper-level science-focused students or highly ...
openaire   +3 more sources

Active optics in astronomy – modeling of deformable substrates: freeform surfaces for FIREBall and MESSIER

open access: yesJournal 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
doaj   +1 more source

Implementing of the ISON project in Northern Mexico

open access: yesOpen Astronomy, 2018
ISON, being an open international project that collects and interprets data about space objects for scientific analysis and spacecraft operators, includes about 40 observational sites.
Mokhnatkin Artem   +5 more
doaj   +1 more source

The MAGIC telescope [PDF]

open access: yesProceedings of International Europhysics Conference on High Energy Physics — PoS(HEP2005), 2007
MAGIC (Major Atmospheric Gamma Imaging Cherenkov telescope) is presently the largest ground-based gamma ray telescope. MAGIC has been taking data regularly since October 2004 at the Roque de los Muchachos Observatory on the island of La Palma. In this paper the MAGIC telescope status, its performances and some preliminary results on observed gamma ray ...
openaire   +3 more sources

Retracted: Can the chemical industry solve the climate change?On the role of human energy production, renewable energies, and the potential of chemistry as a solution provider

open access: yesChemie 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
wiley   +1 more source

L’observatoire de Juvisy-sur-Orge, l’« univers d’un chercheur » à sauvegarder

open access: yesIn 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
doaj   +1 more source

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