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... Earth's upper atmosphere was decreasing, a possible indication of the first stage of ozone-layer recovery. Scientists had analyzed data that NASA's first and second Stratospheric Aerosol and Gas ... ~ specifically the 1987 Montreal Protocol on Substances that Deplete the Ozone Layer and its amendments. (NASA, “NASA Observations Confirm Expected Ozone Layer Recovery,” news release 03-253, 29 July 2003, http://www ...

... Spirit , had visited previously. Because of the crater’s size and depth, it has many layers of exposed rock. The images that the rover captured would enable scientists to view and analyze the rock layers. The study of these layers would provide clues to the planet’s geological and meteorological history, such as ...

... warm core. The radar pictures also showed that the crust is composed of layers of icy dust, interspersed with layers of almost pure ice. The researchers believed that vacillations in Mars’s orbit had caused the planet’s climate to change, resulting in these layers. ASI, the Italian space agency, had produced the SHARAD. NASA’s Jet Propulsion Laboratory JPL ...

... . Before arriving at Victoria, Opportunity had explored the Eagle and Endurance craters, revealing distinctive sediment layers in Endurance, along with evidence that water had been a factor in actively shaping those ... crater’s edge and then had traveled down into the crater. The rover had found layers of sulfate-rich sandstone like that of the Endurance crater, “with evidence that water had ...

... Earth that suggests the presence of light elements -- such as sulfur and oxygen -- in a layer around our own core. The researchers used extensive data gathered during the Apollo-era moon ... were reflected by elements of the moon's interior, signifying the composition and state of layer interfaces at varying depths. Although sophisticated satellite imaging missions to the moon made significant contributions ...

... to Earth show a scene of eroded knobs and gulches on a mountainside, with geological layering clearly exposed. The new views were taken by the 100-millimeter telephoto lens and the ... Malin Space Science Systems in San Diego. "Those layers are our ultimate objective. The dark dune field is between us and those layers. In front of the dark sand you see redder ...

... . "We estimate from our neutron measurements the water ice lies beneath a layer that has much less hydrogen. The surface layer is between 10 and 20 centimeters 4-8 inches thick," Lawrence ... , consistent with the theory that ice in those areas is covered by a thermally insulating layer. Neumann suggests impacts of comets or volatile-rich asteroids could have provided both the dark ...

... warmer stratospheric temperatures this year. These temperatures led to a smaller ozone hole." The ozone layer acts as Earth's natural shield against ultraviolet radiation, which can cause skin cancer. The ... lower stratosphere where the ozone hole occurs." NASA and NOAA have been monitoring the ozone layer on the ground and with a variety of instruments on satellites and balloons since the ...

... for a spacesuit with a new, special kind of coating: a G4C with a cover layer. Were you involved in that at all, in trying to transition to a newer suit ... weren’t very fancy about it. You went to North American, and they had layers and layers of briefers and this and that and the other things, and customer service or customer ...

... were put in, so you can think of it as kind of a layered cake. They put the first layer in and we tested all those systems. Then they put the second layer in and we tested those systems and then them with the ones below. As they ...

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