A NASA satellite has captured the first occurrence this summer of mysterious iridescent polar clouds that form 50 miles above Earth's surface.
NASA's Tropical Composition, Cloud and Climate Coupling field campaign will begin this summer in Costa Rica, with an investigation into how chemical compounds in the air are transported into the stratosphere and how that transport affects cloud formation and climate.
More than two weeks of heavy rains have triggered severe flooding throughout the Midwest.
NASA's Landsat satellite is providing a unique perspective of this enormous man-made structure.
A new NASA study proposes a novel technique to pinpoint more precisely the location of Earth's center of mass and how it moves through space.