Results 1 to 10 of about 8,326 (173)
Nature, 1873 MR. BACKHOUSE asks if the observations given in vol. iii. p. 203, afford any proof that the Zodiacal Light is not a lens-shaped disc of light enveloping the Sun; if this theory were correct, and the sun enveloped in a continuous mass of light-reflecting matter, whenever the light is seen in the evening after sunset, it ought to be also seen in the ...
exaly +8 more sources
Extragalactic background light measurements and applications. [PDF]
R Soc Open Sci, 2016 This review covers the measurements related to the extragalactic background light intensity from γ-rays to radio in the electromagnetic spectrum over 20 decades in wavelength.
Cooray A.
europepmc +2 more sources
A Study of the Extragalactic UV Radiation in Helix Nebula using GALEX
Walailak Journal of Science and Technology, 2021 We have studied the ultraviolet sources using Galaxy Evolution Explorer medium imaging surveys in Helix Nebula and estimated UV fluxes by using aperture photometry in distant and near ultraviolet bands. The aperture photometric method produces reliable,
Lakshmi S BOSE
doaj +3 more sources
Heliocentric distance dependence of zodiacal light observed by Hayabusa2#
Earth, Planets and Space, 2023 Zodiacal light (ZL) is sunlight scattered by interplanetary dust particles (IDPs) at optical wavelengths. The spatial distribution of IDPs in the Solar System may hold an important key to understanding the evolution of the Solar System and material ...
Kohji Tsumura +23 more
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Near-infrared Polarization Charateristics of the Zodiacal Light Observed with DIRBE/COBE
The Astrophysical Journal, 2023 We report near-infrared polarization of the zodiacal light (ZL) measured from space by the Diffuse Infrared Background Experiment (DIRBE) on board the Cosmic Background Explorer in photometric bands centered at 1.25, 2.2, and 3.5 μ m.
Kohji Takimoto +3 more
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A Nature Deity? The Ṛgvedic Savitṛ Revisited
Studia Orientalia Electronica, 2020 The problematic identity of the deity Savitṛ in early Vedic religion has sparked more than a century of discussion. Harry Falk, for instance, argued that this god, whose name literally means “Impeller”, can be identified with the Milky Way and associated
Dominik A. Haas
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The Astronomical Journal, 2023 The diffuse, unresolved sky provides most of the photons that the Hubble Space Telescope (HST) receives, yet remains poorly understood. The HST Archival Legacy program SKYSURF aims to measure the 0.2–1.6 μ m sky surface brightness (sky-SB) from over 140 ...
Rosalia O’Brien +24 more
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Inflight calibration of the optical navigation camera for the extended mission phase of Hayabusa2
Earth, Planets and Space, 2023 After delivering its sample capsule to Earth, the Hayabusa2 spacecraft started its extended mission to perform a flyby of asteroid 2001 CC21 in 2026 and rendezvous with asteroid 1998 KY26 in 2031.
Manabu Yamada +19 more
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Pseudo dawn and true dawn observations by naked eye in Egypt
Beni-Suef University Journal of Basic and Applied Sciences, 2018 Naked eye observations of the morning twilight phenomenon, beginning, end of a pseudo dawn and the true dawn are recorded. These results are an average of 38 observations carried out at Wadi Al Natron (30° 30′ N, 30° 09′ E) with a desert background ...
M.A. Semeida, A.H. Hassan
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