Ursa Minor, or Little Bear, the constellation of the northern sky that contains the Little Dipper. Ursa Minor is the most northerly of all constellations. Its brightest starPolaris, or the North Staris within approximately one degree of the north celestial pole. Because of this, Polaris never sets in latitudes north of the Equator, and is therefore visible in the Northern Hemisphere sky on any clear night. The second and third brightest stars, forming the end of the Little Dipper's bowl, are called the Guardians of the Pole.
Relying on a collapsed star to power our lives on Earth might seem like a good solution to our energy crisis, but there's just one tiny problem: The process might be lethal.
It's not uncommon for planets to wander alone through the universe like big, sullen teenagers. But how do they end up flying solo, and could they still harbor life?