A proposed planet definition – a planet is a sub-stellar mass body that has never undergone nuclear fusion and that has sufficient self-gravitation to assume a spheroidal shape adequately described by ...

Update Aug. 17: Astronomers Sharply Divided on New Planet Definition The tally of planets in our solar system would jump instantly to a dozen under a highly controversial new definition proposed by ...

We're still waiting for someone to create a proper Harry Potter-like invisibility cloak, but in the meantime researchers have used nanoparticles to 'cloak' the shape of an object. The work was done by ...