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Porco was the first person to describe the behavior of the eccentric ringlets and the "spokes" discovered by Voyager within the rings of Saturn; to elucidate the mechanism by which the outer Uranian rings were being shepherded by the Voyager-discovered moons Cordelia and Ophelia; and to provide an explanation for the shepherding of the rings ...
He discovered Saturn's biggest moon, Titan, and was the first to explain Saturn's strange appearance as due to "a thin, flat ring, nowhere touching, and inclined to the ecliptic." [10] In 1662, he developed what is now called the Huygenian eyepiece, a telescope with two lenses to diminish the amount of dispersion. [11]
Pan is the innermost named moon of Saturn. [4] It is approximately 35 kilometres across and 23 km wide and orbits within the Encke Gap in Saturn's A Ring.Pan is a ring shepherd and is responsible for keeping the Encke Gap free of ring particles.
The latter include the D Ring, extending inward to Saturn's cloud tops, the G and E Rings and others beyond the main ring system. These diffuse rings are characterised as "dusty" because of the small size of their particles (often about a μm); their chemical composition is, like the main rings, almost entirely water ice. The narrow F Ring ...
The timeline of discovery of Solar System planets and their natural satellites charts the progress of the discovery of new bodies over history. Each object is listed in chronological order of its discovery (multiple dates occur when the moments of imaging, observation, and publication differ), identified through its various designations (including temporary and permanent schemes), and the ...
Aegaeon is the smallest known moon of Saturn outside of the rings and has an extremely elongated shape, measuring 1.4 km × 0.5 km × 0.4 km (0.87 mi × 0.31 mi × 0.25 mi) in size. [9] Measurements of its mass show that Aegaeon has a very low density, likely due to a highly porous and icy interior structure. [ 5 ]
A new species of fish has been discovered in the Amazon: a piranha relative with humanlike teeth. The eye-catcher was named after a “Lord of the Rings” villain.
The enormous crater Herschel on Saturn's moon Mimas; The Herschel gap in Saturn's rings. 2000 Herschel, an asteroid; The William Herschel Telescope on La Palma; The Herschel Space Observatory, successfully launched by the European Space Agency on 14 May 2009. It was the largest space telescope of its kind, until the launch of the James Webb ...