Four large “potentially hazardous” asteroids – one the size of a skyscraper – are expected to pass by Earth on Thursday, astronomers say. The asteroids range from 100ft to 580ft across, and two of these space rocks were only discovered earlier this month, according to Nasa ’s asteroid watch dashboard.

Four huge asteroids — and a fifth that's much smaller — are passing Earth on Thursday in their closest approaches to the planet ever recorded.

Four "potentially hazardous" space rocks, which are between 100 and 580 feet across, will all make their closest approaches to Earth within less than 12 hours of one another on Thursday (Oct. 24). Two of them were only discovered earlier this month.

Four enormous asteroids, including one with the potential to wipe out an entire city off the map, are making a close flyby of Earth on Thursday. Deemed potentially hazardous, each will come within 30 miles of our planet in just a span of 12 hours.

Four 'potentially hazardous' space rocks will pass Earth within a 12-hour window today, including a massive 'city killer' asteroid.

Four asteroids will make their closest approaches to Earth on Thursday (Oct 24) one after the other within a span of 12 hours. Two of these asteroids were discovered just this month, one of them only about a week back.