Results 251 to 260 of about 41,807 (281)

Roost abandonment and behavioural shifts following human disturbance of vampire bats in complex landscapes

open access: yes
Ribeiro R   +17 more
europepmc   +1 more source

An abundant population of small irregular satellites around Jupiter

Nature, 2003
Irregular satellites have eccentric orbits that can be highly inclined or even retrograde relative to the equatorial planes of their planets. These objects cannot have formed by circumplanetary accretion, unlike the regular satellites that follow uninclined, nearly circular and prograde orbits.
Scott S, Sheppard, David C, Jewitt
openaire   +4 more sources

Black rain: The burial of the Galilean satellites in irregular satellite debris

Icarus, 2013
Abstract Irregular satellites are dormant comet-like bodies that reside on distant prograde and retrograde orbits around the giant planets. They are likely to be captured objects. Dynamical modeling work indicates they may have been caught during a violent reshuffling of the giant planets ∼4 Gy ago (Ga) as described by the so-called Nice model ...
William F. Bottke   +3 more
openaire   +3 more sources

The discovery of faint irregular satellites of Uranus

Icarus, 2004
We report the discovery of four new uranian irregular satellites in our deep, mR ∼ 25.4, optical search around that planet. The orbital properties of these satellites are diverse. Th ere is some grouping of inclinations and one of the satellites appears to be inside the Kozai resonant zone of Uranus.
Kavelaars, J.J.   +9 more
openaire   +6 more sources

Irregular Satellites in the Context of Planet Formation

Space Science Reviews, 2005
All four giant planets in the solar system possess irregular satellites, characterized by large, highly eccentric and/or highly inclined orbits. These bodies were likely captured from heliocentric orbit, probably in association with planet formation itself. Enabled by the use of large-format digital imagers on ground-based telescopes, new observational
David Jewitt, Scott Sheppard
openaire   +3 more sources

The Irregular Satellites of Saturn

2018
With 38 known members, the outer or irregular moons constitute the largest group of satellites in the saturnian system. All but exceptionally big Phoebe were discovered between the years 2000 and 2007. Observations from the ground and from near-Earth space constrained the orbits and revealed their approximate sizes (~4 to ~40 km), low visible albedos ...
Denk, T.   +4 more
openaire   +2 more sources

SATELLITE STUDIES OF ISOLATED IONOSPHERIC IRREGULARITIES

Canadian Journal of Physics, 1965
Ground-based observations of the radio signals propagated through the ionosphere from artificial satellites provide useful information about ionospheric irregularities. The technique has been extended to include recordings of the relative phase of the radio waves received at two stations as well as the customary amplitude recordings.
R. M. Turnbull, P. A. Forsyth
openaire   +1 more source

Irregular Fading of Satellite Transmissions

Nature, 1961
IN a paper by Kent1 it was stated that irregular fading of satellite transmissions on 40 Mc./s. from Sputnik 1 did not occur when the satellite was south of 50° N., and indeed was of very small amplitude on the average when the magnetic inclination at the sub-satellite point was less than 68°, the value at the observing station near Cambridge ...
openaire   +1 more source

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