Large stars go supernova but smaller stars sometimes end up as planetary nebulae – colorful, glowing clouds of dust and gas.
These nebulae have been observed to often emit powerful, bipolar jets of gas and dust. But how do spherical stars evolve to produce highly aspherical planetary nebulae?
A hypothesis published in the Monthly Notices of the Royal Astronomical Society by a University of Rochester undergraduate student and a professor states that only "strongly interacting" binary stars – or a star and a massive planet – can feasibly give rise to these powerful jets.