New Images Hint at Wet and Wild History For Europa . Chunky ice rafts and relatively smooth, crater-free patches on the surface of Jupiter's frozen moon Europa suggest a younger, thinner icy surface than previously believed, according to new images from Galileo's spacecraft released today. ... These features, which lend credence to the idea of hidden, subsurface oceans, also are stirring up controversy among scientists who disagree about the age of Europa's surface. ... Europa . ...

The following images of the icy surface of Ganymede, the Solar System's largest moon, were made by the Galileo spacecraft during its ongoing mission to explore Jupiter and the Jovian system. ... This image was taken when Galileo was 7,448 kilometers (4,628 miles) away from Ganymede; north is to the top of the picture, and sunlight illuminates the surface from the lower left nearly overhead (77 degrees above the horizon). ... The image was taken June 27 at a range of 7,448 kilometers (4,628 miles). ...

... UA SCIENTIST & TEAM DISCOVER SURFACE FEATURES COVER TITAN (Science contacts: Peter H. Smith, (602) 621-2725; Mark Lemmon, (602) 621-1485; UA Lunar and Planetary Laboratory) . Scientists for the first time have made images of the surface of Saturn 's giant, haze-shrouded moon, Titan. ... About three weeks before Cassini's first flyby of Titan, the spacecraft is to release the European Space Agency's Huygens Probe to parachute to Titan's surface. ... Upper left: hemisphere facing Saturn. ...

... The spacecraft of Magion type have been selected as the subsatellites of the Interball project: Magion-4 (C2-X) for the Tail Probe and Magion-5 (C2-A) for the Auroral Probe. ... Magion-4 was produced in the Czech Republic in collaboratrion with Russia, Ukraine, Hungary, Austria and has onboard scientific instruments and sensors designed and built in Czech Republic, Russia, Poland, Hungary, Romania, Bulgaria and Slovak Republic. ... Plasma flow detector VDP-S (Czech Republic, Russia) . ...

... Tonight's Sky . ... The Magazine . ... Observing . ... Magazine . ... Astronomy for Kids . ... Dawn scientists chat about the mission . ... Scientists and engineers associated with NASA s Dawn mission teamed up to bring you these videos about the discoveries both behind and ahead of the spacecraft. ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ... Astronomy Magazine . ...

... Ж.Ф. Родионова, А.А.Карлов, Т.П. Скобелева и др. ... Sternberg State Astronomical Institute, 119899, Moscow, Russia; jeanna@sai.msu ru. ... Moscow State University, Vorobjovy Gory, 119899, Moscow, Russia. Brown University - Vernadsky Institute Microsymposium 34, October 8-9, 2001, Moscow, Russia . ... Rodionova J1., ... Sternberg State Astronomical Institute, Moscow University, jeanna@sai.msu.ru . ... 1 Sternberg State Astronomical Institute Lomonosov Moscow University, Russia; marss8@mail.ru . ...

Astronomy Picture of the Day . Galileo's First Color Image of Io . ... 19.07.1996 . ... Credit Copyright: Galileo Project , JPL , NASA Explanation: Above is the first color image of Jupiter's volcanic moon Io released by the Galileo Project. ... The image was made on June 25 when the Galileo spacecraft approached within 1.4 million miles. ... While scientists continue to analyze this image and other recent Galileo data the robot spacecraft will continue to explore Jupiter's moons . ... July 1996 . ...

... HST . ... Data . ... HST Peer Review Process . ... HST Overview . Overview . ... Phase I Proposing . ... Cycle 24 Announcement . Cycle 23 Results . ... Mid Cycle Submission . ... Phase II Cycle 23 . ... Retrieving HST Data . ... Data Analysis . ... HST Science Year in Review . ... Phase I . ... Data Files . ... Instrument Handbook . STIS Data Handbook . ... Previous SMOVs . ... HST Primer . ... ETC 18.0 Known Issues and Features . ...

... Apollo 15 brings back 4 billion-year-old moon rock . ... Scott said. ... During the crew?s three spacewalks, Scott and James B. Irwin spent almost nineteen hours exploring the moon and covered 17.5 miles of lunar terrain in the lunar rover. ... For more information on the crew training, traverses, and experiences of some of the instructors for Apollo 15, read some selected oral history interview excerpts available on the JSC History Portal: http://www.jsc.nasa.gov/history/special_events/Apollo15.htm...

home publications > mercury . ... A Titan-ic Mission . ... Saturn's moon Titan seems like the stuff of science fiction, but it really exists, out there in the distant reaches of our own Solar System. ... Ringed Saturn, heavily veiled by the thick atmosphere of this small world, hangs low and huge in the sky. ... But under that heavy atmosphere, planetary scientists believe an exotic world awaits our discovery [see "Saturn and Titan on the Eve of Cassini-Huygens," September/October, p. 10]. ...

... The Scientist's Expert Assistant (SEA) is a prototype effort for the Next Generation Space Telescope that uses a combination of artificial intelligence and user interface techniques to explore ways to substantially reduce the time and effort involved in proposal preparation for both scientists and the telescope operations staff. ... At the time, SEA supported only a single observation, had the basics of a graphical exposure calculator and a visual target tuner, and had a very limited expert system. ...