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2 May 2013 |
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Landslides and Lava Flows at Olympus Mons on Mars
Giant landslides, lava flows and tectonic forces are behind a dynamic scene captured recently by ESA's Mars Express of a region scarred by the Solar System's largest volcano, Olympus Mons.
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4 Apr 2013 |
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Scientists to Io: Volcanoes Are In The Wrong Spot
Jupiter's moon Io is the most volcanically active world in the solar system, with hundreds of volcanoes, some erupting lava fountains up to 250 miles high (about 400 kilometers). However, concentrations of volcanic activity are significantly displaced from where they are expected to be, based on models that predict how the moon's interior is heated, according to NASA and European Space Agency researchers.
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2 Dec 2012 |
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A New Episode of Active Volcanism on Venus?
For decades, planetary scientists have debated whether Venus possesses active volcanoes. The latest twist to the tale is provided by data sent back from ESA's Venus Express orbiter, revealing unexplained major changes in the amount of sulfur dioxide gas above the planet's dense cloud layer.
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30 Oct 2012 |
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Curiosity Rover's First Soil Studies Help Fingerprint Martian Minerals
NASA's Mars rover Curiosity has completed initial experiments showing the mineralogy of Martian soil is similar to weathered basaltic soils of volcanic origin in Hawaii. The minerals were identified in the first sample of Martian soil ingested recently by the rover. Curiosity used its Chemistry and Mineralogy instrument (CheMin) to obtain the results, which are filling gaps and adding confidence to earlier estimates of the mineralogical makeup of the dust and fine soil widespread on the Red Planet.
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16 Oct 2012 |
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What's Baking on Titan?
Radar images from NASA's Cassini spacecraft reveal some new curiosities on the surface of Saturn's mysterious moon Titan, including a nearly circular feature that resembles a giant hot cross bun and shorelines of ancient seas. The results were presented today at the American Astronomical Society's Division of Planetary Sciences conference in Reno, Nev.
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11 Oct 2012 |
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Mars Rock Touched by NASA Curiosity has Surprises
The first Martian rock NASA's Curiosity rover has reached out to touch presents a more varied composition than expected from previous missions. The rock also resembles some unusual rocks from Earth's interior.
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21 Sep 2012 |
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MESSENGER's X-Ray Spectrometer Reveals Chemical Diversity on Mercury's Surface
New data from the X-Ray Spectrometer (XRS) on the MESSENGER spacecraft -- one of two instruments designed to measure the abundances of many key elements on Mercury -- show variations in the composition of surface material on Mercury that point to changes over time in the characteristics of volcanic eruptions on the solar system's innermost planet. Scientists report that Mercury's volcanic smooth plains units differ in composition from older surrounding terrains.
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