Radio astronomy uses radio antennas, rather than mirrors and cameras, to detect radio emission from astronomical objects. Many things in the Universe emit radio waves, including stars, planets, ...

The Brandeis Radio Astronomy Group consists of Professors John Wardle and David Roberts (emeritus). We conduct research in extragalactic astrophysics and cosmology at wavelengths covering the entire ...

They are extensively used in radio astronomy, their main advantages being to avoid spectral confusion and to diminish effective system temperature by a factor 2 with respect to double sideband (DSB) ...

The answer is: a radio telescope that can track hydrogen in the Milky Way as well as the velocities of hydrogen clouds via their Doppler shifts, according to a paper by [Jack Phelps] titled ...