Hubble Finds Oxygen Atmosphere On Jupiter's Moon Europa . Astronomers using NASA's Hubble Space Telescope (HST) have identified the presence of an extremely tenuous atmosphere of molecular oxygen around Jupiter's second moon, Europa . ... Europa's oxygen atmosphere is so tenuous that its surface pressure is barely one hundred billionth that of the Earth," said Principal Investigator Doyle Hall, of Johns Hopkins. ... The oxygen gas slowly leaks into space and must be replenished continuously. ...

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• The Planet Jupiter
• Jupiter's Moon Ganymede
• Hubble Observations Shed New Light on Jupiter Collision

NASA Press Release Text - June 24, 1996 GALILEO READY FOR CLOSE FLYBY OF JUPITER'S BIGGEST MOON Now residing in orbit around Jupiter, NASA's Galileo spacecraft is primed for its first close flyby of Jupiter's largest moon, Ganymede, at 2:29 a.m. EDT on June 27, 1996. ... In the days just before and after the Ganymede flyby, Galileo's other studies will include a search for auroral activity on Jupiter's nightside and observations of other Jovian moons: Io, Europa and Callisto. ...

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• Europa
• APOD Index - Solar System: Jupiter's Moons
• APOD: 2000 December 19 - A Close Up of Aurora on Jupiter

Ganymede . ... Ganymede Statistics . ... Hubble Finds Ozone on Jupiter's Moon Ganymede . ... Like Callisto , Ganymede is most likely composed of a rocky core with a water/ice mantle and a crust of rock and ice. ... Ganymede's mantle is most likely composed of ice and silicates, and its crust is probably a thick layer of water ice. ... Ganymede's surface is rich in water ice and Voyager and Galileo images show features which are evidence of geological and tectonic disruption of the surface in the past. ...

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• Galileo Finds Giant Iron Core in Jupiter's Moon Io
• Europa
• Galileo Crosses Boundary Into Jupiter's Environment

Giant Jupiter. Jupiter . ... Jupiter has no solid surface that is why speaking about its dimensious point the radius of the upper border line of the clouds, where the presseru is about 10 KPa; radius of Jupiter on the equator is 71400 km. ... The Jupiter satellites. ... Nowadays 16 satellites of the Jupiter are known: Adrastea, Mitis, Amaltea , Phina,then 4 Galilei satellites: Io , Europe , Hanimed , Callisto , Leda, Aimalia, Zicitea, Elara, Ananke, Carme, Pasipe and Sinope. ... Jupiter's ring. ...

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• saturne

... A Close Up of Aurora on Jupiter . ... Oceans Under Jupiter's Ganymede . ... The search for extraterrestrial life came back into our own Solar System last week with the announcement that there may be liquid oceans under the surface of Jupiter's moon Ganymede. Ganymede now joins Callisto and Europa as moons of Jupiter that may harbor seas of liquid water under layers of surface ice. M2 9: Wings of a Butterfly Nebula . ... Degas Ray Crater on Mercury . ... Jupiter Eyes Ganymede . ...

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... 2005 Some important issues Europa moves relative to magnetospheric magnetic field with velocity ~ 105 km/sec (subsonic velocity ) Europa has induced magnetosphere and Alfven wings Europa has atmosphere (51014 cm-2) and ionosphere (~103 ­ 104 cm-3) Energetic particles hit Europa's surface that leads to sputtering rate of ~31027 molecules/sec Europa is an important source of neutrals particles (50kg of 2) and ionized ...

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• Solar Energetic Particles
• The Sun
• The Radiation Belt -- History

NATIONAL ASTRONOMY AND IONOSPHERE CENTER . ... Astronomy . ... Visitor Center . ... Planetary Radar . ... A program of delay-Doppler mapping of the Galillean satellites is underway by L. Harcke and colleagues at Stanford University. The surfaces of Europa, Ganymede and Callisto have been imaged in order to determine the surface properties and look for different radar properties of the various terrain types. These maps will be correlated with the Galileo images of the satellites.€а . ...

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• astronomers detect coolest star
• Astronomers Detect Coolest Radio Star National Astronomy and Ionosphere Center

Ganymede is the largest moon in our solar system, larger even than the planets Pluto and Mercury. ... Ganymede's surface consists of two main types of terrain: old, dark polygonal units, and young, bright valleys and ridges (see figure 11 ). ... In a similar way, hitting a large block of ice with a hammer makes white marks. ... Ganymede as seen by Voyager 2. ... Because Voyager couldn't spot any large impact craters, scientists have concluded that the moon's surface is young. ... Moon . ... Europa . ...

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• ASP: The Comet About to Smash into Jupiter
• ASP: Science@Saturn: Cassini-Huygens Mission to Saturn and Titan

Электронная библиотека астронома-любителя. ... библиотека . архив RSN . ... Ru.Space.News: . Июль 1998 . ... Дата: 21 июля 1998 (1998-07-21) От: Alexander Bondugin Тема: Today On Galileo - July 19, 1998 Привет всем! ... TODAY ON GALILEO July 19, 1998 The fifth encounter of the Galileo Europa Mission starts late today, seven months after the start of the spacecraft's mission extension. ... The first in the series was the last encounter of Galileo's primary mission. ...

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... One of this year's largest mass ejections from the Sun's atmosphere was recorded last Sunday by TESIS telescopes aboard the CORONAS-PHOTON satellite ( video - wmv 4.3 MB ). ... Over the course of a week, two gigantic solar prominences were simultaneously ejected from the surface of the Sun. ... Earth will not feel the Sun's influence either. ... The TESIS observatory ї TESIS: www.tesis.lebedev.ru . ... One of this year's largest mass ejections from the Sun's atmosphere (movie WMV, 4.3 MB) . ...

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... Magnetic fields, subatomic particles, etc., traveling in different directions fill the universe. Do they deflect or otherwise affect one another? If so, isnт??t the information we get from them distorted? ... Neutrino astronomy, which is still in its infancy, is attractive because neutrinos interact so weakly with matter that few of these distorting effects occur. Get instant access to subscriber content on Astronomy.com! ...

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• Astronomers once thought Pluto's atmosphere would condense down to the surface
• New Horizons sets its sights on Pluto flyby | Astronomy.com
• "Deflector shields" protect the lunar surface | Astronomy.com

Astronotes Armagh Planetarium's Stellar Blog! ... Comets and Asteroids . ... Space Flight . ... Science Fiction . UFOs and Fringe Science . ... This close-up look at Comet ISON (C/2012 S1) is from NASAтАЩs Hubble Space Telescope. This image was captured on 10 April 2013, when the comet was at a distance of 386 million miles (slightly further than Jupiter) from the Sun. ... Image credit: NASA, ESA, J.-Y. Li (Planetary Science Institute), and the Hubble Comet ISON Imaging Science Team) . ...

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• Exploring Icy Moons in Search of Life | Astronotes
• See giant planet Jupiter tonight | Astronotes
• Vesta: Asteroid seen by Dawn spacecraft | Astronotes

Mal Ruderman (KIPAC, Stanford) . What do we see when we look at the surface of a neutron star from a great distance? ... The new point that is made is a consequence of near-relativistic electron-positron flows expected in the near-magnetosphere's of "young" (not older than about a million years) neutron stars. Because of cyclotron resonance scattering by these pair-flows on surface X-ray and UV emission, we do not see unprocessed suface emission. ...

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• AY2016 (contents)
• AY2012 (contents)
• AY2014 (contents)

... Dept. for Physics of Minor Celestial Bodies . Dept. for Physics of Planetary Systems . Dept. for Solar Physics . ... Achievements . ... The theory of radiative transfer in inhomogeneous atmospheres was developed ( Yanovytskij E.G. ) . ... Calculations shown that the vertical movement of gas and aerosol in the atmosphere of giant planets with velocity w = (0.1-0.5) m/s determines the capacity of visible clouds and therefore affects their brightness characteristics (A. P. Vidmachenko). ...

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• Dept. for Physics of Planetary Systems

Outer Natural Satellites Orbits Ephemerides. ... Choose type of the ephemeride: . ... Values of the orbital elements [ output e sin( ), e cos( ), sin(i) sin( ), sin(i) cos( ) ] . Distances between the osculating orbits . ... Choose Second Satellite (for the distances) N9 Halimede N10 Psamathe N11 Sao N12 Laomedeia N13 Neso . ... Enter initial date (years) . Enter final date (years) . ... inclination deg. pericenter deg. node deg. Enter upper limit of frequency deg/year . ...

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• Natural Satellites Service. Apparent Encounters of the Tycho-2 Catalogue stars
• Nomenclature of natural satellites
• jg0007

... ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Astrophysics graduate student programs . ... Australian Square Kilometre Array Pathfinder . Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . ... Visiting Parkes radio telescope . Visiting Australia Telescope Compact Array . ... Radio emission from Jupiter was first serendipitiously discovered at decametric wavelengths by Franklin and Burke in 1955. ...

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• Thermal Emission from Jupiter
• Jupiter's Radio Emissions in 3D
• The magnetic fields of neutron stars

Whoever looked up at the sky at dusk on Monday, 1st December was fortunate enough to see one of the most beautiful night-sky views of the year тАУ a massing of planetary bodies in the south-west. The gas giant planet, Jupiter, was nearly in conjunction with bright, тАШevening starтАЩ, Venus, and the Moon. ... The images show, respectively, the telescope and Venus emerging from behind the Moon, after the end of the occultation, while Jupiter is above and to the right. ...

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• Armagh Observatory Jupiter Venus Conjunction
• New Jupiter Moon
• Irregular Satellite Research

... More on 51 Peg: . The discovery of a Jupiter--mass planet in orbit around the solar--type star 51Peg has been reported by Michel Mayor and Didier Queloz (Geneva Observatory) on October 6th at the 9th Cambridge workshop on "cool stars, stellar systems, and the sun" held at Florence (Italy). ... Recall that the measurements of radial velocity only yield v sin i which in turn gives us M sin i. For most values of i, sin i will be greater than 0.5 and this gives a mass estimate of 0.5 Jupiter masses. ...

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• Low Surface Brightness Galaxy Gallery
• The Galaxy Gallery Page 6: Comparative Morphology
• Nov 13: Jupiter II

Program Number . ... George Benedict, University of Texas at Austin . ... On the one hand, HST has been involved in cosmic distance measurements since its inception, largely through the H 0 Key Project, which used WFPC2 to identify and photometer Cepheids in 31 spiral galaxies at distances from 60 to 400 Mpc. ... The present program aims to address this issue through HST ACS (and, more recently, HST WFPC2) imaging of Cepheids in several fields in the relatively nearby spiral galaxy, M101. ...

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• HST this week: 148
• HST this week: 008
• Supersonic Motions in the Upper Atmosphere of Jupiter Detected at Ly- with GHRS

... galaxies: bulges galaxies: clusters: general galaxies: clusters: individual: . ... star formation statistics stellar content structure Cosmology ( cosmology :) cosmic background radiation ( cosmology :) cosmological parameters cosmology : miscellaneous cosmology : observations cosmology : theory ( cosmology :) dark ages, reionization, first stars ( cosmology :) dark energy ( cosmology :) dark matter ( cosmology :) diffuse radiation ( cosmology :) distance scale ( cosmology :) early Universe (...

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• Physics of Magnetic Stars 2007
• C/2010 S1 (LINEAR), C/2010 R1 (LINEAR)
• Galaxy sector, archive 2014