On Thursday, four significant asteroids, including one termed a 'city killer,' are making close approaches to Earth, although none pose an immediate threat of collision. The largest, asteroid 2002 NV16, measures 580 feet and could potentially destroy a city if it struck, but it will safely pass within 2.8 million miles from Earth. Two of the asteroids, 2024 TR6 and 2024 TP17, were only identified earlier this month, emphasizing the ongoing need for vigilant monitoring of near-Earth objects. Despite their size, the asteroids will not be visible to the naked eye, but scientists are actively tracking them to gather more data. The European Space Agency classifies these asteroids as 'potentially hazardous' due to their proximity, though experts assure they don't pose an immediate threat. This event highlights the importance of constant observation, as new asteroids are frequently discovered just before their close flybys.