Watch live online as the dwarf planet Ceres swoops in front of the 'grand design' spiral galaxy Messier 100 this weekend.
Potentially hazardous asteroids, or potentially hazardous objects, are large space rocks that orbit closely to Earth and could cause widespread damage to our planet.
A severe geomagnetic storm from a huge hole in the sun's corona caused a massive disturbance in Earth's magnetic field. The surprise event sparked auroras as far south as Alabama and northern California.
A new study estimates that bacteria on meat may be responsible for a significant number of urinary tract infections in the U.S.