Researchers have helped unravel the mystery of why certain pairs of stars pulse with regular, long-period bursts of radio waves. The particular class of objects they observed come in pairs that always include a compact dead star, called a white dwarf, locked in orbit with an M dwarf, a red star smaller than our Sun. Astronomers have been intrigued by a certain type of binary systems that pulse with long-period bursts of radio waves. These pulses occur every few minutes, much longer than the radio pulses from rapidly spinning neutron stars (pulsars), which repeat... [3364 chars]
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