Astronomers discover a huge, celestial object hurtling through space and after a space probe confirms that is not a natural object, send a space team to investigate. At first, only a few things are known about the celestial object that astronomers dub Rama. It is huge, weighing more than ten trillion tons. And it is hurtling through the solar system at inconceivable speed. Then a space probe confirms the unthinkable: Rama is no natural object. It...