Electron Microprobe Lab (Cameca sx-100)
The electron probe is outfitted with one energy-dispersive and five wave-dispersive spectrometers with state of the art control software for automation of stage and analytical conditions. Measurements are made on spots as small as one micrometer and can determine elemental abundances to several hundred parts per million for selected elements. Quantitative X-ray elemental maps offer important information on compositional variability of samples….Read More.
Eileen K. Stansbery, Director
Astromaterials, Research & Exploration Science
Dr. Stansbery, Director of Astromaterials Research and Exploration Science at NASA Johnson Space Center (JSC), is responsible for the planning and managing of all functions in support of the physical sciences at JSC including astromaterials curation and associated research of planetary materials, support to human and robotic spaceflight through science planning and operations, image analysis, orbital debris and the risks of micrometeoroids and orbital debris to spacecraft.
Her areas of scientific interest are planetary exploration with specific expertise in sample return, contamination control and the curation and quarantine of extraterrestrial samples. Her expertise includes space physics and systems analysis.
Dr. Stansbery had a major role from inception in the Genesis Discovery Mission (a solar wind sample return) as the Mission Contamination Control Lead, Curation Lead, and the JSC Project Manager. She was responsible for contamination control, collector material installation, ultra-precision cleaning of the science canister, and curation of the samples that were returned in 2004.
The series of eleven images above depicts the strongest hurricane, cyclone, or typhoon during each year, regardless of ocean basin. It includes storms both infamous and obscure. The judging is based on the storm with the highest wind speed, using lowest minimum pressure as a tie-breaker when needed. The images were all captured by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra or Aqua satellites, and they are all shown at the same scale.
In the past 11 years, two of the most powerful storms were in the Atlantic/Caribbean basin, six were in the Western Pacific (and north of the equator), and three were in the South Pacific. Even without looking at the table below, you can distinguish Northern Hemisphere storms from Southern by examining the imagery. Northern cyclones rotate counterclockwise, while southern storms rotate clockwise (because of the Coriolis force). All storm categories are based on the Saffir-Simspon Hurricane Scale….Read More.
Craters near the summit of Mount Etna streamed ash and volcanic gases shortly before the volcano’s eleventh paroxysm of 2013. Recent lava flows, colored brown, snake down the eastern mountainside from the New Southeast Crater. This natural-color image was collected on April 18, 2013 by the Advanced Land Imager (ALI) on the Earth Observing-1 (EO-1) satellite….Read More.