Read more: See hereFour 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 .
The largest of them, dubbed 2002 NV16, is 580ft (177m) across and will reach a minimum distance of 4.5 million km (2.8 million miles) from Earth at around 3.50pm UTC.
Another of the space rocks named 2024 TR6, which is about 50m wide, will come within 5.6 million km (3.5 million miles) of the planet a few minutes later.
Nasa maintains a log of asteroids and comets that will make relatively close approaches to Earth in what it calls the Asteroid Watch dashboard.
It reveals the object's approximate diameter, relative size, date of closest approach, and distance from Earth for each of these encounters.
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