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of seasonal changes in ocean surface topography, currents, waves, winds, phytoplankton content, sea-ice extent, rainfall, sunlight reaching the sea, and sea surface...
search for a faint polarization pattern caused by gravitational waves produced during inflation. This technology will result in instruments that not only provide improved...
be combined with another laser beam so the two interfere slightly to yield a more easily measured radio wave in place of the two light waves. The technique is called...
on GPS reception. Before a GPS satellite signal reaches the ground, it must first pass through ionospheric gases that bend, reflect and attenuate radio waves. Solar and...
measures the wind over water by sensing its froth. "Strong winds sweep and swirl across ocean waves, whipping up foamy white froth," explains Hood. "HIRAD measures microwave...
magnetar. As a magnetar's colossal magnetic field shifts, it strains the crust with monstrous magnetic forces, often breaking it. When the crust snaps, it vibrates with...
." The MDI instrument played a key role in showing that solar flares produce seismic waves, and gigantic seismic quakes, in the Sun's interior...
polar craters. Again, no one knows what it is, although a favorite possibility is ice. Frozen water is a good reflector of radio waves and would explain the observations...
waves while I photographed this magnificent display is something I'll never forget." Right: Northern Lights over Myrtle Beach, South Carolina, on Nov. 20, 2003. Credit: Jim...
Chlorophyll Concentrations. Credit: NASA/Goddard Space Flight Center Learn more with this activity about Color Mapping. Top of Page | Next:...