Voyager's Golden Record is a 12-inch gold-plated copper disk, encoded with music, sounds and images ... to known pulsars. Pulsars are the rapidly spinning remains of dying stars—the leftover ...

On February 24, 1968, an astronomy grad student Jocelyn Bell announced that she had discovered the first pulsar. A few months earlier, she noticed what she called a "bit of scruff" in the data from ...