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Topic: Italian Space Agency
Just as our own Moon floats away from Earth a tiny bit more each year, other moons are doing the same with their host planets. As a moon orbits, its gravity pulls on the planet, causing a temporary bulge in the planet as it passes. Over time, the energy created by the bulging and subsiding transfers from the planet to the moon, nudging it farther and farther out. Our Moon drifts 1.5 inches (3.8 centimeters) from Earth each year. ![]() Larger than the planet Mercury, huge moon Titan is seen here as it orbits Saturn. Below Titan are the shadows cast by Saturn’s rings. This natural color view was created by combining six images captured by NASA’s Cassini spacecraft on May 6, 2012. (NASA/JPL-Caltech/Space Science Institute) «Read the rest of this article» Sections: Technology | No Comments
NASA states Subsurface Lake may exist at Mar’s South PoleNASA’s Jet Propulsion Laboratory
The finding is based on data from the European Mars Express spacecraft, obtained by a radar instrument called MARSIS (Mars Advanced Radar for Subsurface and Ionosphere Sounding). The Italian Space Agency (ASI) led the development of the MARSIS radar. NASA provided half of the instrument, with management of the U.S. portion led by the agency’s Jet Propulsion Laboratory in Pasadena, California. ![]() The view of Mars shown here was assembled from MOC daily global images obtained on May 12th, 2003. (NASA/JPL/Malin Space Science Systems) «Read the rest of this article» Sections: Technology | No Comments
NASA’s Dawn Spacecraft data used to map Gravity of Dwarf Planet CeresWritten by Elizabeth Landau
Since gravity dominates Dawn’s orbit at Ceres, scientists can measure variations in Ceres’ gravity by tracking subtle changes in the motion of the spacecraft. Using data from Dawn, scientists have mapped the variations in Ceres’ gravity for the first time in a new study in the journal Nature, which provides clues to the dwarf planet’s internal structure. ![]() This artist’s concept shows a diagram of how the inside of Ceres could be structured, based on data about the dwarf planet’s gravity field from NASA’s Dawn mission. (NASA/JPL-Caltech/UCLA/MPS/DLR/IDA) «Read the rest of this article» Sections: Technology | No Comments
NASA’s Mars Reconnaissance Orbiter data reveals most recent Ice Age on MarsWritten by Guy Webster
The new results agree with previous models that indicate a glacial period ended about 400,000 years ago, as well as predictions about how much ice would have been accumulated at the poles since then. The results, published in the May 27th issue of the journal Science, help refine models of the Red Planet’s past and future climate by allowing scientists to determine how ice moves between the poles and mid-latitudes, and in what volumes. ![]() Climatic cycles of ice and dust build the Martian polar caps, season by season, year by year, and periodically whittle down their size when the climate changes. This image is a simulated 3-D perspective view, created from image data taken by the THEMIS instrument on NASA’s Mars Odyssey spacecraft. (NASA/JPL/Arizona State University, R. Luk) «Read the rest of this article» Sections: Technology | No Comments
NASA uses Satellite data to create Damage Maps of Nepal’s EarthquakeWritten by Elizabeth Landau
Quickly assessing and communicating where the hardest-hit areas are and prioritizing which regions or communities have the greatest need for first-response teams is difficult when a disaster unevenly devastates various parts of a large area. It helps to get a bigger-picture view of where the damage is located from a high vantage point: low-Earth orbit. ![]() This image shows street-level photos in the Bhaktapur area of Nepal overlaid on a damage proxy map derived from data from COSMO-SkyMed satellites. The color gradation — yellow to orange to red — represents increasingly more significant change on the ground. (NASA/JPL-Caltech/Google/DigitalGlobe/CNES/Astrium/Amy MacDonald/Thornton Tomasetti) «Read the rest of this article» Sections: Technology | No Comments
NASA’s Cassini Spacecraft to move into higher orbit around SaturnWritten by Preston Dyches
The second of five large propulsive maneuvers in this campaign took place on Saturday, January 23rd. Each maneuver in the series sets up a subsequent gravity-assist flyby of Saturn’s massive moon Titan, which reshapes the spacecraft’s orbit, sending it to increasingly higher inclination with respect to Saturn’s equator. ![]() This is an artists concept of Cassini during the Saturn Orbit Insertion (SOI) maneuver, just after the main engine has begun firing. (NASA/JPL) «Read the rest of this article» Sections: Technology | No Comments
NASA’s Cassini spacecraft to sample Saturn’s moon Enceladus’s ocean by flying through it’s icy plumeWritten by Preston Dyches
Cassini launched in 1997 and entered orbit around Saturn in 2004. Since then, it has been studying the huge planet, its rings and its magnetic field. Here are some things to know about the mission’s upcoming close flyby of Enceladus: ![]() This daring flyby will bring the Cassini spacecraft within 30 miles (48 kilometers) of Enceladus’ south pole. (NASA/JPL-Caltech) «Read the rest of this article» Sections: Technology | No Comments
NASA’s Cassini spacecraft takes photos of Saturn’s Moon Enceladus’ northern extremesWritten by Preston Dyches
The spacecraft obtained the images during its October 14th flyby, passing 1,142 miles (1,839 kilometers) above the moon’s surface. Mission controllers say the spacecraft will continue transmitting images and other data from the encounter for the next several days. ![]() NASA’s Cassini spacecraft zoomed by Saturn’s icy moon Enceladus on Oct. 14, 2015, capturing this stunning image of the moon’s north pole. A companion view from the wide-angle camera (PIA20010) shows a zoomed out view of the same region for context. (NASA/JPL-Caltech/Space Science Institute) «Read the rest of this article» Sections: Technology | No Comments
NASA’s Cassini spacecraft to make close up flybys of Saturn’s Moon EceladusWritten by Preston Dyches
Wednesday’s flyby is considered a moderately close approach for Cassini, which will pass at an altitude of 1,142 miles (1,839 kilometers) above the moon’s surface. Closest approach to Enceladus will occur at 3:41am PDT (6:41am EDT). The spacecraft’s final two approaches will take place in late October and mid-December. ![]() NASA’s Cassini spacecraft will get its best-ever look at the northernmost reaches of the Saturnian moon Enceladus on October 14th. (NASA/JPL-Caltech) «Read the rest of this article» Sections: Technology | No Comments
NASA’s Cassini Spacecraft takes one last close flyby of Saturn’s moon DioneWritten by Preston Dyches
Cassini passed 295 miles (474 kilometers) above Dione’s surface at 11:33am PDT (2:33pm EDT) on August 17th. This was the fifth close encounter with Dione during Cassini’s long tour at Saturn. The mission’s closest-ever flyby of Dione was in December 2011, at a distance of 60 miles (100 kilometers). ![]() This view from NASA’s Cassini spacecraft looks toward Saturn’s icy moon Dione, with giant Saturn and its rings in the background, just prior to the mission’s final close approach to the moon on August 17, 2015. (NASA/JPL-Caltech/Space Science Institute) «Read the rest of this article» Sections: Technology | No Comments
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