A house-sized asteroid will swing past the Earth tomorrow at a distance so close it is classified as 'potentially hazardous'. This means it will be closer than the moon, which is about 239,000 miles (384,000km) away. AU means astronomical unit – a measure of distance which is approximately 93million miles (150,000,000km), the same as from the Earth to Sun. This means that an asteroid will be considered potentially hazardous if it's less than 4.6million miles away. There are currently 878 asteroids at risk of hitting the Earth in the next 100 years, according to the European Space Agency (ESA).

Source: Daily Mail October 02, 2019 13:50 UTC