Results 81 to 90 of about 9,625 (210)

Nachtsicht ins All mit dem bloßen Auge: Sag mir, wie weit die Sterne steh'n

Physik in unserer Zeit, Volume 57, Issue 1, Page 32-40, January 2026.
Beim Blick in den Nachthimmel sehen wir ohne optische Hilfsmittel und abhängig von der lokalen Lichtverschmutzung viele Hundert bis maximal einige Tausend Sterne und auch einige Galaxien. Aber wie weit sind diese von uns entfernt? Und bis zu welchen maximalen Entfernungen können wir Objekte im Weltall mit dem bloßen Auge wahrnehmen?
Michael Vollmer
wiley   +1 more source

Study on the Imaging Interference of a Vortex-Light-Modulated Gaussian Beam

Photonics
Combined with vortex light and airglow, some different physical phenomena are presented in this paper. Based on the ground-based airglow imaging interferometer (GBAII) made by our group, a liquid crystal on silicon (LCoS) device on one arm of a wide ...
Yanghe Liu, Yuanhe Tang, Jian Zhou, Cunxia Li, Ningju Hui, Yishan Zhang, Yanlong Wang   +6 more
doaj   +1 more source

Registering upper atmosphere parameters in East Siberia with Fabry–Perot Interferometer KEO Scientific “Arinae”

Solar-Terrestrial Physics, 2017
We describe the Fabry—Perot interfero-meter designed to study Earth’s upper atmosphere. We propose a modification of the existing data processing method for determining the Doppler shift and Doppler widening and also for separating the observed line ...
Vasilyev R.V., Artamonov M.F., Beletsky A.B., Zherebtsov G.A., Medvedeva I.V., Mikhalev A.V., Syrenova T.E.   +6 more
doaj   +1 more source

Variable O VI and N V emission from the X-ray binary LMC X-3 : heating of the black hole companion [PDF]

, 2010
Based on high-resolution ultraviolet spectroscopy obtained with the Far Ultraviolet Spectroscopic Explorer (FUSE) and the Cosmic Origins Spectrograph, we present new detections of Ovi and Nv emission from the black hole X-ray binary (XRB) system LMCX-3 ...
Cui, Wei, McClintock, Jeffrey E., Orosz, Jerome A., Song, Limin, Steeghs, D., Steiner, James F., Torres, M. A. P., Tripp, Todd M., Wang, Q. Daniel, Xue, Yongquan, Yao, Yangsen   +10 more
core   +4 more sources

Multi‐Species Energy‐Banded Ions in the Ionosphere During the 21 January 2005 Magnetic Storm: Low‐Altitude Edge of the Warm Plasma Cloak

Journal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.
Abstract During the 21–22 January 2005 magnetic storm, the FAST satellite observed warm (< few keV) ions in discrete energy bands on the dayside at ∼3,000 km altitude for more than 6.5 hr. We suggest that the ionospheric energy‐banded ions represent the low‐altitude edge of the warm plasma cloak observed simultaneously by magnetospheric satellites ...
J. U. Kozyra, M. W. Liemohn, C. A. Cattell, J. Dombeck, C. P. Escoubet, M. Thomsen, G. Lu, D. J. Knipp, L. J. Paxton, R. M. Skoug, H. A. Elliott, A. J. Davis, L. Rastaetter, D. DeZeeuw, C. Colpitts   +14 more
wiley   +1 more source

FUSE Observations of the Dwarf Nova SW UMa During Quiescence [PDF]

, 2004
We present spectroscopic observations of the short-period cataclysmic variable SW Ursa Majoris, obtained by the Far Ultraviolet Spectroscopic Explorer (FUSE) satellite while the system was in quiescence.
A. Lobel, Gansicke B. T., Innes D. E., J. C. Raymond, K. Menou, M. S. Povich, Rosen S. R., Shafter A. W.   +7 more
core   +1 more source

A Survey of Atmospheric Gravity Waves Observed by GOLD During Quiet to Moderate Solar and Geomagnetic Activity

Journal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.
Abstract Atmospheric gravity waves (GWs) are believed to transport energy and momentum between different regions of the atmosphere. Historically, observations of these waves from both ground and space have been relatively abundant at altitudes up to the lower thermosphere, and somewhat less abundant in the upper thermosphere and F‐region ionosphere ...
Scott L. England, Shun‐Rong Zhang, Scott Evans, Richard W. Eastes   +3 more
wiley   +1 more source

Sky Surface Brightness at Mount Graham: UBVRI Science Observations with the Large Binocular Telescope

, 2009
We present the measurements of sky surface brightness on Mount Graham International Observatory obtained during the first binocular-mode science runs at the Large Binocular Telescope (LBT).
Pedani, M.
core   +1 more source

Climatology of Medium‐Scale Traveling Ionospheric Disturbances Over Continental US Using GNSS TEC From 2012 to 2023

Journal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.
Abstract Medium‐Scale Traveling Ionospheric Disturbances (MSTIDs) have long been a subject of interest in ionospheric research. However, their spatiotemporal variability across regions, local times, seasons, and solar cycles is very complicated and remains not well established.
Jing Liu, Shun‐Rong Zhang, Anthea J. Coster, Philip J. Erickson, Hanli Liu   +4 more
wiley   +1 more source

Detection of wave activity in measurements of thermospheric vertical winds and temperatures at subauroral latitudes

Frontiers in Astronomy and Space Sciences
The need for high precision measurements of vertical winds with uncertainties on the scale of 3–5 m s−1 and a temporal cadence of 1–2 min to achieve detection of gravity wave (GW) structure has made it exceedingly difficult to study the response of the ...
Anneliese L. Schmidt, John W. Meriwether, Matthew B. Cooper, Andrew J. Gerrard, Lindsay V. Goodwin, Shun-Rong Zhang, Ying Ye   +6 more
doaj   +1 more source