The robotic arm on Phoenix collected the sample, dubbed "Burning Coals," from a trench named "Burn Alive 3." In part of the trench, the arm had dug down to the hard, icy layer about 4 centimeters (1.6 inches) below the ground surface. Next to that deeper part, it left a bench of material about 1 centimeter (0.4 inch) above the icy layer, and then collected about one-fourth to one-half a teaspoon of loose soil from that benchtop into the scoop.
Early Thursday, downlinked information from Phoenix confirmed to the mission's science and engineering team that the arm had delivered some of that sample through the doors and almost completely filled cell number 7 of the lander's Thermal and Evolved-Gas Analyzer (TEGA).
TEGA won't begin heating an oven until it senses that oven is full. So the science team will command the oven door to close and the cell will begin heating the sample to low temperature, to 35 degrees Celsius, or 95 degrees Fahrenheit. TEGA scientists have successfully sent commands for an oven to close manually before, they noted.
The purpose of the low temperature heating is to look for ice in the sample. The next step is a middle temperature heating process, which heats the sample to 125 degrees Celsius, or 257 degrees Fahrenheit. This step assures that the sample is dry. The last heating occurs at 1,000 degrees Celsius, or 1,832 degrees Fahrenheit. The gases given off during these heating stages helps the science team to determine the specific properties of the Martian soil.
"We are expecting the sample to look similar to previous samples," said William Boynton of The University of Arizona, lead scientist for TEGA. "One of the things we'll be looking for now is an oxygen release indicative of perchlorate."
Perchlorate was found in a sample delivered to Phoenix?s Microscopy, Electrochemistry, and Conductivity Analyzer (MECA). The MECA team saw the perchlorate signal in a sample taken from the Dodo-Goldilocks trench on June 25, or Sol 30, or the 30th Martian day of the mission after landing, and again in another sample taken from the Snow White trench on July 6, or Sol 41. Seeing signs of perchlorate in TEGA would help confirm the previous results.
The new sample completes a three-level soil profile that also includes a surface material from a trench called Rosy Red and ice-layer material from a trench called Snow White.
"We want to know the structure and composition of the soil at the surface, at the ice and in-between to help answer questions about the movement of water -- either as vapor or liquid -- between the icy layer and the surface," said Ray Arvidson of Washington University in St. Louis, a leader of Phoenix science team activities.
The Phoenix mission is led by Peter Smith of The University of Arizona with project management at the Jet Propulsion Laboratory and development partnership at Lockheed Martin, located in Denver. International contributions come from the Canadian Space Agency; the University of Neuchatel; the universities of Copenhagen and Aarhus, Denmark; Max Planck Institute, Germany; and the Finnish Meteorological Institute.
Astronomers find unexpected, dust-obscured star formation in distant galaxy
24.03.2017 | University of Massachusetts at Amherst
Gravitational wave kicks monster black hole out of galactic core
24.03.2017 | NASA/Goddard Space Flight Center
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...
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