Over the next several weeks, astronomers will be looking closely at an asteroid called 2024 YR4 that could be as big as a football field as they try to determine how likely it is to strike Earth in 2032.

Scientists recently doubled the chances that Asteroid 2024 YR4 will hit Earth in 2032. While earlier estimates said the chance of the giant space rock- roughly the size of Big Ben- had around a one per cent chance of collision with our planet,

On the world's first Asteroid Day, Nina Burleigh discovers that Nasa has already commissioned a team of 'planetary defenders' for whom the question is not if but when