... Credit Copyright: Cassini Imaging Team , SSI , JPL , ESA , NASA Explanation: What's happening in this strange juxtaposition of moon and planet? First and foremost, Saturn's moon Dione was captured here in a dramatic panorama by the robotic Cassini spacecraft currently orbiting the giant planet. ... Arcing across the bottom of the image , however, are shadows of Saturn's rings , showing some of the rich texture that could not be seen directly. ... Saturn, Tethys, Rings, and Shadows . ...

... 2015 August 24 . Dione, Rings, Shadows, Saturn . Image Credit: Cassini Imaging Team , SSI , JPL , ESA , NASA . ... Arcing across the bottom of the image , however, are shadows of Saturn's rings , showing some of the rich texture that could not be seen directly. In the background, few cloud features are visible on Saturn . The featured image was taken during the last planned flyby of Dione by Cassini, as the spacecraft is scheduled to dive into Saturn's atmosphere during 2017 . ...

... Bad Astronomy . ... Bitesize Astronomy . ... Have you ever looked at pictures of Saturn's rings and noticed what look like gaps in the rings? ... Gian Domenico Cassini discovered a large gap in Saturn's rings in 1675. Later, an astronomer named Encke discovered a smaller gap near the edge of the rings. ... It was found long ago that an orbit in the Cassini Division, as the large gap is named, has a period almost exactly one-half that of one of Saturn's moons named Mimas. ... 2008 Phil Plait. ...

... Solar System . ... Planets . ... Saturn is the sixth planet from the Sun and is the second largest in the solar system. A day on Saturn is 10 hours 39 minutes long, and it takes 29.5 Earth years to revolve about the Sun.€аThe atmosphere is primarily composed of hydrogen with small amounts of helium and methane.€аAt the last count it had 62 Moons, but it is another feature of this gas planet which makes it spectacular, its ring system. ... The first man to notice the rings of Saturn was Galileo. ...

... Running Rings Around a Planet . ... Saturn's delicate rings have caught human eyes for over three centuries. ... Now we know, thanks to the Voyager space probes, that Saturn's rings consist of thousands of "ringlets," each made of chunks of ice ranging in size from dust to boulders [see "Rally Around the Ring," March/April 1995, p. 10]. ... The appearance of Saturn's rings to us ground-hugging Terrans is changing constantly. ... Saturn's diameter is 120,000 kilometers, so how large are the rings? ...

... Saturn is the sixth planet from the Sun , and the second largest in the solar system . Saturn's most distinctive feature is its ring system . ... Saturn has an internal magnetic field with a dipole aligned with the rotation axis (Ness et al., ... The solar wind and Saturn's rings and satellites supply the particles that are trapped in the radiation belts. ... Between the inner and outer satellites orbits Titan, Saturn's largest moon (larger than the planet Mercury ). ... Res., ...

... Tonight's Sky . ... The Magazine . ... Observing . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... Bright planets meet at dusk . ... Astronomy magazine subscribers can read the full article for free. ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter....

... ATNF Home . ... About ATNF overview . News | ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Murchison Radio-astronomy Observatory . ... Parkes radio telescope . ... Mopra radio telescope . ... Visiting Parkes radio telescope . ... Parkes radio telescope webcam . ... Now, new Australia Telescope observations of the polar ring galaxy NGC 4650a suggest that the dark matter in this galaxy lies in a flattened distribution aligned with the polar ring. ...

... Voyager Spacecraft Introduction (This Page) . ... The twin Voyager spacecraft, over the course of a dozen years, drew back the curtain on nearly half of the solar system . From launch in 1977 through the spectacular parting shots in 1989 of Neptune at the outer reaches of the solar system, this pair of gangly, instrument-laden spacecraft explored four planets -- Jupiter , Saturn , Uranus and Neptune -- as well as tens of moons, and the rings and magnetic environments of those planetary systems. ...

... A dynamo is created in a magnetic field by an electric circuit, part of which is moving relative to the rest (additional conditions must also be met). ... Furthermore, the plasma between them conducts electricity very well along its magnetic field lines, which act as if they were wires connecting Io and the planet (drawing). ... The drawing is not to scale. ... The Hubble Space Telescope , using its Wide Field and Planetary Camera 2, has been photographing auroras of the planet Jupiter. ...

Image of Saturn by Mark and Nigel Stronge taken on 17th December 2002 showing the square shadow where the planet's shadow meets the Cassini division. ... showing the black drop effect. The report was published in a recent issue of the magazine 'Astronomy Geophysics,' entitled 'Extending the Black Drop to Saturn' ** by Mark Bailey (Armagh Observatory), David Stewart (Irish Astronomical Association) and Mark Stronge (East Antrim Astronomical Society). ...

OBSERVATIONS OF COORBITAL SATELLITES OF SATURN Emel'yanov N., Varfolomeev M. Sternberg State Astronomical Institute, Moscow, e-mail : emelia@sai.msu.ru Institut de MИcanique CИleste et de Calcul des иphИmИrides, Paris, e-mail : emelia@imcce.fr Abstract. To improve the orbital parameters and masses of coorbital satellites of Saturn, Janus and Epimetheus, new observations of these satellites are necessary. ... IN: Saturn. ... New observations of Saturn's coorbital satellites" - Icarus. ...

... Recent Topics . ... MAO main . ... August Issue: How We Conquered the Planet . ... Тема: August Issue: How We Conquered the Planet . To view this email as a web page, go here. links.email.scientificamerican.com/servl.. NzIxOTM0NTcxS0 =0 . ... A new hypothesis explains why links.email.scientificamerican.com/ctt?k... ... What they find could change the future of planet hunting links.email.scientificamerican.com/ctt?k... ... Unsubscribe - links.email.scientificamerican.com/ctt?k... ... MAO NASU . ...

Moon, Planets And Aurora, Oh My! Articles | ... Moon | ... How often do we see several planets and the Moon together? ... Then I look northeast and see more red through all the light pollution of Washington, D.C. I snapped this 15 second photo. ... What started out as a father son photographic safari for rare planet conjunctions turned into a spectacular night of memories. ... Aha, I see some red light near Orion. ... A Very Rare Red Aurora in Northern Virginia, . ... www.astronomy.net . ...

... Below is a preliminary schedule for the meeting "Planets Beyond the Solar System and the Next Generation of Space Missions," to be held at STScI in Baltimore on October 16, 17, and 18, 1996. ... A workshop to bring together scientists searching for extrasolar planets with those planning a new generation of space instrumentation. ... New programs for the detection and study of planets (interferometry, photometry, microlensing) . ... K. Sahu, STScI: Detecting planets with microlensing . ...

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. Mars has become the center of intense interest since the Martian Meteorite results were announced. Currently there is a lively debate whether or not primitive life formed there or not.

... The first of these, of the HL Tau protoplanetary disc, revealed a striking series of concentric rings but oddly, no spirals, as one might expect if the gaps in the disc are being carved by newborn planets. In this talk I ll show how the rings in HL Tau can be beautifully and convincingly explained as being caused by protoplanets, but only when the interaction between gas and dust in the disc is accounted for. ...

. My astronomical research interests center on galaxy structure and evolution. Current topics include: . Polar-ring and interacting galaxies (see also new catalogue ) . Galaxy warps: statistics, properties and origin . Spiral galaxies at z~1: radial and vertical structure of stellar disks, statistics of interactions . Surface photometry and kinematics, dynamical modeling . Observational cosmology . Joomla Counter since Sep 1997

Influence of Asteroids and Trans-Neptunian Objects on the Motion of Major Planets and Masses of the Asteroid Main Belt and the TNO Ring . ... Perturbations from asteroids and Trans-Neptunian Objects (TNOs) produce a significant effect on the orbits of planets and should be taken into account when high-accuracy planetary ephemerides are constructed. On the other hand, from an analysis of motion of the major planets some physical parameters of the asteroids and TNOs may be obtained. ...