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Earth, Climate Change
Jan 26, 2016

using a radar altimeter -- an instrument similar to weather radars here on Earth. Here’s how it works: The satellite emits a pulse of radar waves that travel down toward...

Universe
Sep 1, 2015

large areas of skies, detection of gravitational waves from space, and understanding exoplanet chemical element compositions. Critical technologies enabling such measurements...

Sun
Nov 7, 2008

-rays bathed the dayside of our planet and sent waves of ionization rippling through the atmosphere over Europe. Hams monitoring VLF radio beacons noticed strange "fades" and...

Earth, ISS
Jul 28, 2016

than smooth waters. From that information, scientists can derive wind speed, as well as its direction based on the orientation of the waves. “RapidScat excels at measuring...

Universe
Oct 31, 2018

observable stochastic background of gravitational waves that impresses a faint polarized signature on the CMB. The National Research Council’s decadal survey recommended...

Apr 20, 1999

wavelengths and high energies. Telescopes rely on the interaction between energy and matter. The atomic matter that forms the telescope has to somehow interpret the energy...

Universe, Sun
Dec 21, 1998

that's not all -- they also reflect radio waves. During a shower like the Leonids, radio signals from TV stations, RADAR facilities, and AM/FM transmitters are constantly...

Universe, Solar System
Jun 28, 1999

. The luminous ionized trails are not only visually striking -- they also reflect radio waves. During a major meteor shower, radio signals from TV stations, RADAR facilities...

Sun
Jan 18, 2002

helioseismology, which can probe conditions within the Sun much like seismic waves reveal the interior structure of our planet, announced that currents of gas at the base of...

Sun
Mar 11, 2008

and their interaction with Earth and other planets, as well as with the interstellar medium. Investigations of the physics of magnetospheres, including fundamental...

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