Pulsars emit deadly radiation, disintegrating DNA and making them dangerous. Surprisingly, some have planets orbiting them, defying current theories.
This month we are expecting the flyby of Asteroid 2005 YU55. On November 8th, it will make a close approach to the Earth at 0.85 lunar distances. It has a diameter of about 400 meters so unfortunately it is too small to be visible to the naked eye.