4 ms·
It is the 21cm hydrogen line from the early universe. It is redshifted from 1420 MHz down to 200 MHz to 9 MHz; they were looking at 78 MHz.
by ianburrell 9y ago
It is the 21cm hydrogen line from the early universe. It is redshifted from 1420 MHz down to 200 MHz to 9 MHz; they were looking at 78 MHz.