binary

So, be thankful you have such a binary choice.

"Our data suggests that it is in a binary with another object, which is likely to be a white dwarf, the stellar core of a dying star. Together, they power radio emission."

The world is far more complicated now, however, than these binary economic relationships.

Kendall has said she wants to end the binary nature of the system - classifying people as fit, or unfit, to work.

Future research may aim to determine if the supernova was larger at one point, whether just by being a super-massive star or if its materials were stripped away by a still undiscovered binary companion.