terça-feira, 6 de fevereiro de 2018
Europe Nears 10 Years at Station; Crew Studies Mice and Plants
The International Space Station program is getting ready to recognize the 10th in year in space of its Columbus lab module from the European Space Agency (ESA). The Expedition 54 crew members, meanwhile, spent the day helping scientists on the ground understand the impacts of living in space.
ESA is getting ready to celebrate the 10th anniversary of the launch ofColumbus. The European lab module blasted off inside space shuttle Atlantis on Feb. 7, 2008, for a two-day ride to the station. Canadarm2, the station’s robotic arm, removed Columbus from Atlantis’s cargo bay two days after its arrival and attached it the starboard side of the Harmony module.
A month after the installation of Columbus, ESA launched its first resupply ship to the station. The “Jules Verne” Automated Transfer Vehicle (ATV-1) lifted off March 9, 2008, atop an Ariane-5 rocket from Kourou, French Guiana. The ATV-1 then took a month-long ride for a series navigation tests before to automatically docking to the station.
Astronauts Scott Tingle and Norishige Kanai continued studyingmice on the space station for a drug study to potentially improve muscle health in microgravity and despite a lack of exercise. The rodents are housed in a special microgravity habitat for up to two months with results of the study helping scientists design therapies for humans with muscle-related ailments.
Flight Engineer Mark Vande Hei set up botany gear in the Columbus lab module for the Veggie-3 experiment. The long-running plant study is exploring the feasibility of harvesting edible plants such as cabbage, lettuce and mizuna for consumption during spaceflight. Samples are returned to Earth for analysis.
domingo, 20 de agosto de 2017
PRESERVING THE STRESS OF VOLCANIC UPRISE ON MARS
10 August 2017
An ancient mountain range on Mars preserves a complex volcanic and tectonic past imprinted with signs of water and ice interactions.
The images, taken on 9 April by the high-resolution stereo camera on ESA’s Mars Express, show the Thaumasia mountains and Coracis Fossae, which fringe the huge Solis Planum volcanic plateau from the south.
The region lies to the south of the vast Valles Marineris canyon system and towering Tharsis volcanoes, and is strongly linked to the tectonic stresses that played out during their formation over 3.5 billion years ago.
As the Tharsis bulge swelled with magma during the planet’s first billion years, the surrounding crust was stretched, ripping apart and eventually collapsing into troughs. While Valles Marineris is one of the most extreme results, the effects are still seen even thousands of kilometres away, such as in the Coracis Fossae region observed in this image where near-parallel north–south faults are visible primarily to the left.
Tectonic structures like these can control the movement of magma, heat and water in the subsurface, leading to hydrothermal activity and the production of minerals.
Light-toned deposits, which might be clay minerals formed in the presence of water, stand out in the right part of the colour image and at the rim of the large crater. Similar deposits were identified in the nearby Lampland crater.
There is also evidence for valley formation by groundwater erosion and surface runoff occurring at the same time as when the active tectonics shaped the landscape. The water-based erosion means the troughs have been partially buried and heavily modified.
The region was later modified by glacial processes, seen in the flow-like lineated patterns in the flat floors of the large craters.
As a representative of the ancient highlands of Mars, this region holds a wealth of information about the Red Planet’s geological history.