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Exploring Venus as a Terrestrial Planet
Esposito, Larry W.; Stofan, Ellen R.; Cravens, Thomas E.
With the search for extra-solar planets in full gear, it has become essential to gain a more detailed understanding of the evolution of the other earth-like planets in our own solar system. Space missions to Venus, including the Soviet Veneras, Pioneer Venus, and Magellan, provided a wealth of information about this planet' enigmatic surface and a…
The Sun - Earth Workshop: A Summary of the Outcome
Culhane, J. L.; Siscoe, G. L.
This special issue includes a set of papers that deal with extended solar activity, the launching of CMEs at the Sun, their propagation through interplanetary space, and the detection and study of the ejecta near Earth and of their interaction with the Earth's magnetic environment. In particular solar events that occurred on 28 October 2003, 6 and…
The puzzling X-ray source in RCW103
Caraveo, P. A.; Bignami, G. F.; Tiengo, A. +2 more
1E 161348-5055 (1E) is a compact object lying at the center of the 2000 year old Supernova Remnant (SNR) RCW103. Its original identification as an isolated, radio-quiet neutron star has been questioned in recent years by the observation of a significant long-term variability, as well as by reports of a possible periodicity at ∼6 hours. Here we rep…
The Cassini Mission at Saturn
Mitchell, Robert T.
The Cassini Mission to Saturn, a joint undertaking by NASA, the European Space Agency, and the Italian Space Agency, is now at about the mid-point of its planned four-year tour of the Saturnian system. Close encounters with Titan and the smaller icy satellites are occurring on schedule, and observations of these bodies along with Saturn's atmosphe…
On anticorrelation of number of coronal bright points with sunspot number during 1996 2006
Karachik, Nina V.; Pevtsov, Alexei A.; Sattarov, Isroil +1 more
Using full disk SOHO/EIT data from 1996 to 2006, we study latitudinal distribution of coronal bright points over a period of one solar cycle. We confirm the presence of two distinct types of coronal bright points, and find that the number of "quiet corona" bright points in high latitudes anticorrelate with solar activity as defined by the sunspot …
A method of determining binary orbits by incorporating long-term observational data
Fu, Y. N.; Ren, S. L.
Early ground based observations accumulated a large amount of long-term data about binary stellar systems. Compared with the data obtained by various present-day techniques, the early data have much lower precision. However, the span of the longer time interval makes these data still irreplaceable in certain astronomical researches. The present wo…
Metal Absorption Profiles from the Central Star of the Planetary Nebula M27 (NGC 6853, PN G060.8-03.6, the Dumbbell): Photospheric and Nebular Line Identifications
McCandliss, Stephan R.; Kruk, Jeffrey
High-resolution spectra of the hot central star of the planetary nebula (CSPN) M27, acquired with the Far Ultraviolet Spectroscopic Explorer (FUSE), have revealed an unusually rich set of narrow molecular hydrogen absorption features. This object is also unique in that the velocity of nebular absorption features are cleanly separated from the velo…
Statistical study of low-energy heliosphere particle fluxes from 1.4 to 5 AU over a solar cycle
Lanzerotti, L. J.; Armstrong, T. P.; Maclennan, C. G. +4 more
Throughout the entire Ulysses mission, the Heliosphere Instrument for Spectra, Composition, and Anisotropy at Low Energies (HI-SCALE) has collected measurements of low-energy interplanetary ions and electrons. Time series of electron, proton, and ion fluxes have been obtained since 1990. We present statistical studies of high-resolution ion and el…
Venus Express and terrestrial planet climatology
Taylor, Fredric W.; Svedhem, Håkan; Titov, Dmitri M.
After a delay of more than a decade, the exploration of Venus has resumed through the European Venus Express mission, now in orbit around the planet. The mission payload, its implementation in an elliptical polar orbit, and the science operations planned, all focus on outstanding problems associated with the atmosphere and climate of Venus. Many o…
Risk of dust particle impacts during the Rosetta asteroid fly-bys
Rossi, A.; Fulchignoni, M.
On its course to the comet 67P/Churyumov-Gerasimenko, Rosetta will fly past two main belt asteroids: 2867 Steins and 21 Lutetia. In order to explore the possible risks of impact between the Rosetta probe and particles orbiting 21 Lutetia, the asteroid's dynamical environment is studied. Stable retrograde, nearly equatorial orbits, for small partic…