Results 101 to 110 of about 26,872 (287)

The Evolution of Titan's Cold South Polar Cloud

open access: yesGeophysical Research Letters, Volume 52, Issue 9, 16 May 2025.
Abstract Early during Titan's southern fall, images captured by Cassini's Imaging Science Subsystem revealed the formation of a large cloud above Titan's south pole. Subsequent analysis of Cassini data revealed the cloud contained HCN ice, but the cloud's evolution has not been examined.
Lavender Elle Hanson   +4 more
wiley   +1 more source

The Third Fermi Large Area Telescope Catalog of Gamma-Ray Pulsars

open access: yesThe Astrophysical Journal, 2023
We present 294 pulsars found in GeV data from the Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope. Another 33 millisecond pulsars (MSPs) discovered in deep radio searches of LAT sources will likely reveal pulsations once phase-connected
D. A. Smith   +170 more
doaj   +1 more source

Prediction of transits of solar system objects in Kepler/K2 images: An extension of the Virtual Observatory service SkyBoT

open access: yes, 2016
All the fields of the extended space mission Kepler/K2 are located within the ecliptic. Many solar system objects thus cross the K2 stellar masks on a regular basis.
Berthier, J.   +4 more
core   +3 more sources

PERIOD CHANGE IN THE CONTACT SYSTEM AW UMA

open access: yesOdessa Astronomical Publications, 2017
Nine new minima were determined from the UBV photoelectric observations obtained in 1992 and 1995-6. They were used to derive the new ephemerides of AW UMa. The mid-eclipse brightening best visible in U colour was detected.
T. Pribulla, D. Chochol
doaj   +1 more source

Prediction of Communication Outage Period between Satellite and Earth station Due to Sun Interference [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2010
We developed a computer program to predict solar interference period. To calculate Sun‘s position, we used DE406 ephemerides and Earth ellipsoid model. The Sun‘s position error is smaller than 10arcsec. For the verification of the calculation, we used
Yongjun Song   +3 more
doaj   +1 more source

A Map of Potential Topographic Anomalies on Venus

open access: yesJournal of Geophysical Research: Planets, Volume 130, Issue 5, May 2025.
Abstract The most recent, highest‐resolution, global estimate of the topography of Venus is the Global Topographic Data Record (GTDR), a gridded representation of the altimetry data from the Magellan space mission. This product is impaired by an occasional pattern; a series of visually striking topographic “pits,” often referred to as spuriously low ...
Gerard Gallardo i Peres   +2 more
wiley   +1 more source

INPOP08, a 4-D planetary ephemeris: From asteroid and time-scale computations to ESA Mars Express and Venus Express contributions

open access: yes, 2009
The latest version of the planetary ephemerides developed at the Paris Observatory and at the Besancon Observatory is presented here. INPOP08 is a 4-dimension ephemeris since it provides to users positions and velocities of planets and the relation ...
A. Fienga   +24 more
core   +3 more sources

Ephemeride der Parthenope. [PDF]

open access: yesAstronomische Nachrichten
n ...
Luther, R., Vogel, E.
openaire   +3 more sources

Studying the Inner Heliosphere Using Radio Signals Transmitted From Spacecraft Orbiting Mars

open access: yesSpace Weather, Volume 23, Issue 5, May 2025.
Abstract In this campaign, we used very long baseline interferometry (VLBI) radio telescopes to track the carrier radio signal transmitted from spacecraft orbiting Mars during the Mars solar conjunction. The campaign extended from September 6th $6\text{th}$ to November 6th $6\text{th}$ 2021 and targeted the Mars Express (MEX) and Tianwen‐1 (TIW ...
J. Edwards   +4 more
wiley   +1 more source

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