Jupiter's volcano-pocked moon Io has been found by NASA's Galileo spacecraft to have a giant iron core that takes up half its diameter, scientists report in today's issue of Science magazine. The spacecraft also has detected a large "hole" in Jupiter's magnetic field near Io, leading to speculation about whether Io possesses its own magnetic field. ... Galileo scientists also are trying to determine the cause of the hole they found in Jupiter's magnetic field when the spacecraft was closest to Io. ...

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• Jupiter's Moon Ganymede
• Europa

Galileo Finds Giant Iron Core in Jupiter's Moon Io . Jupiter's volcano-pocked moon Io has been found by NASA's Galileo spacecraft to have a giant iron core that takes up half its diameter, scientists report in today's issue of Science magazine. The spacecraft also has detected a large "hole" in Jupiter's magnetic field near Io, leading to speculation about whether Io possesses its own magnetic field. If so, it would be the first planetary moon known to have one. ... Space History Galileo . ...

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• Hubble Observations Shed New Light on Jupiter Collision
• Hubble Finds Ozone on Jupiter's Moon Ganymede
• New Discoveries From Galileo

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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• APOD Index - Solar System: Jupiter's Moons
• Europa
• APOD: 2010 October 25 - Water Ice Detected Beneath Moons Surface

... LCROSS , LRO , NASA Explanation: Is there enough water on the moon to sustain future astronauts? The question has important implications if humanity hopes to use the Moon as a future outpost. Last year , to help find out, scientists crashed the moon-orbiting LCROSS spacecraft into a permanently shadowed crater near the Moon's South Pole. ... Publications with keywords: Moon - water - water-ice - crater . Publications with words: Moon - water - water-ice - crater . ... Moon Meets Jupiter . ...

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• XWare > APOD

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: Good Astronomy Activities on the WWW
• ASP: The Comet About to Smash into Jupiter
• ASP: Science@Saturn: Cassini-Huygens Mission to Saturn and Titan

Astronomers Detect Coolest Radio Star . ... The new radio-star is much smaller and colder than our Sun.?а With a surface temperature not much higher than that of a giant planet, and a size comparable to JupiterтАЩs, it is scarcely visible in optical light.?а Yet the radio flares seen at Arecibo show it must have a strong magnetic field, implying that the same could be true of other similar stars. ...

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• Astronomers Detect Coolest Radio Star National Astronomy and Ionosphere Center
• hydrocarbon lakes on Titan

... These other worlds are the moons of our Solar System , of which there are approximately 170 in orbit around our planets.Some of these moons are very interesting, and have diverse and unique features, very different to our barren, heavily cratered Moon .Jupiter, the largest planet in our solar system has the most moons of any planet with known 64 moons in orbit.The four ... Ganymede, the largest moon in the Solar System thought to have oceans located underneath its icy surface.( ...

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• The Many Faces of the Solar System | Astronotes
• Comet ISON Puts on a Show for Hubble | Astronotes

... SUN MOON MERCURY VENUS MARS, JUPITER SATURN . ... Mars . ... Spacecraft detects aurora and mysterious dust cloud around Mars . Although the source and composition of the dust are unknown, there is no hazard to MAVEN and other spacecraft orbiting Mars. ... MARS | ... NASA s Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft has observed two unexpected phenomena in the martian atmosphere: an unexplained high-altitude dust cloud and aurora that reaches deep into the martian atmosphere. ...

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• Cassini reveals oxygen atmosphere of Saturn's moon Rhea | Astronomy.com
• Cassini finishes sleigh ride by Saturnт??s icy moons | Astronomy.com
• Spacecraft data suggest Saturn moonт??s ocean may harbor hydrothermal activity

... The related observations clearly evidence both global motions and turbulence in the upper Jovian atmosphere. Keywords: solar system, giant planets, atmospheres, Jupiter . To explain both an upper atmospheric thermal excess observed in the Jupiter atmosphere by the Voyager missions and a permanent enhancement of the H Ly- brightness observed near the equator (Clarke et al. ... These Doppler shifts appear as being the signature of global H motions in the upper atmosphere of Jupiter. ...

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• HST this week: 714
• HST this week: 047
• HST this week: 028

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

Armagh Observatory astronomers who have been using video cameras to monitor meteor activity, or shooting stars, over Armagh for the past three years, have now extended their reach to meteors on other planets as well. In work published in the European astronomy journal "Astronomy and Astrophysics", astronomer Apostolos Christou has now reported the first detected signature of a meteor shower on Mars. ... It appears to have been produced by dust from periodic comet du Toit - Hartley . ...

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• SoHO Antenna Anomaly Press Release
• Armagh Astropark: Comets
• Armagh Astropark

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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• Электронная библиотека астронома-любителя. RU.SPACE.NEWS - архив за 31 марта
• Электронная библиотека астронома-любителя. RU.SPACE.NEWS - архив за 19 января

Understanding Europa's Radiation Environment and How it Influences Landing Site Characterization G.W. Patterson, L.M. Prockter, C. Paranicas Applied Physics Laboratory Introduction Ї The surface of Europa is weathered by charged and neutral particles, micrometeroids, and photons. ... Background Ї Criteria for characterizing potential landing sites [e.g., Figueredo et al., ... 2004) Background Ї Criteria for characterizing potential landing sites [e.g., Figueredo et al., ... Figueredo et al., ...

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• http://www.iki.rssi.ru/conf/2009elw/presentations/presentations_pdf/session3/petrukovich_ELW.pdf
• http://www.iki.rssi.ru/conf/2009elw/presentations/presentations_pdf/session7/vaisberg_ELW.pdf
• The Radiation Belt -- History

... The Sun is the closest star to us, and a regular object in our Galaxy. Solar activity manifests itself, primarily, in solar flares - episodic explosive energy release in the form of electromagnetic radiation and high energy particles (electrons and protons). The nature of the flares is related to cyclic variations of global and local magnetic fields in the atmosphere of the Sun. ... Such formations are called active regions. ...

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• Northern Lights and GLORIA
• Physics of Magnetic Stars 2007
• Speckle interferometry of magnetic stars

... Precisely one month ago, on 11 July 2009, the last active area of the new solar cycle disappeared from the surface of the Sun. Over the 30 days following this, neither observers on Earth nor devices in space have been able to detect the emergence of any sunspots. ... Therefore, it seems that our star has once again returned to a state of deep solar "winter", following several sparks of activity in May-June 2009. ... To date, this period has lasted 30 days. ...

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• TESIS - Telescopes for EUV Spectral Imaging of the Sun
• Project's diary
• The CORONAS-PHOTON has registered the formation of the Sun's southern belt of

... 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
• Nov 13: Jupiter II
• Recently Acquired Images of SL9

... News Research . ... Expert in the characterisation of magnetic activity and the coronae of slowly rotating (solar-type) and planet-hosting stars. ... Characterising the spectra of M dwarfs in the optical and NIR and studying the effects of strong magnetic fields. ... Experienced in modelling the coronae of planet-hosting cool stars and currently mapping magnetic fields in young pre-main sequence stars using HARPS spectropolarimetric data. ... Space Girls Space Women - Gaitee . Science Fuse . ...

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• Aurorae and Volcanic Eruptions | ESO
• Aurorae and Volcanic Eruptions | ESO United Kingdom
• Aurorae and Volcanic Eruptions | ESO United States

... Research objects and scientific purposes . Space scientific program includes development and launch of two supersmall spacecrafts "Universitetskiy" and "Kompas-2" intended for monitoring of radiation conditions near the Earth. ... All the studies conducted in the near-Earth space are characterised by strong radiation fields. ... The circular polar orbits, which cover all the near-Earth space, are the most favorable for comprehensive studies of the radiation conditions near the Earth. ...

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Spacecraft STP Data 1. ... This CD-ROM contains solar flare reports, sunspot numbers and regions histories, total solar irradiance, and solar bursts. ... MAGSAT - 2 discs. ... A Compilation of 1963-1999 Solar Wind Field and Plasma Data, Near Earth and Deep Space - 3 discs. This CD-ROM contains the interplanetary magnetic field (IMF) and solar wind plasma (SWP) data from several spacecraft which have explored the near-Earth and deep space regions over the last three decades. ...

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Next: Particle Background Rejection Up: Detection Efficiency Previous: Front Illumination . ... The method requires that the CCD substrate be etched from the rear towards the depletion layer boundary. The device can be illuminated through this rear surface, which has a much thinner dead layer than the electrode side. ... The corresponding detection efficiency data are presented in Figure 7, and compared with the predicted data for a 20 m thick depletion layer. ...

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• Rejection attributes
• rejection attributes