A "killer asteroid" refers to a large space rock that poses a significant threat to life on Earth if it were to collide with our planet. It has the potential to cause massive destruction and loss of life. Full definition
Next month the only telescope scanning the southern hemisphere sky for dangerous space rocks will shut down for lack of money (see «Vital eye for killer asteroids could shut imminently «-RRB-. (newscientist.com)
So for want of $ 1 million in funding, we won't be able to spot killer asteroids from the southern hemisphere... (newscientist.com)
Consider that NASA can't continue to find killer asteroids as they were commanded to do because they don't have the budget. (discovermagazine.com)