At least three asteroids (space rocks) identified as 2019 QZ3, 2019 RG2 and 2019 QY4 zip past the Earth today hours ago (September 10, 2019). If these three asteroids would have hit the Earth, massive casualties would have occurred. Luckily, they failed. According to the NASA's Center for Near-Earth Object Studies (CNEOS), QZ3 was the biggest of the trio in terms of size. It is to be noted that an asteroid (space rock) can bring tsunamis, shock waves and flattening winds that could be catastrophic. The space rocks approach towards the Earth due to the gravitational forces that affect them. It is said that one day all life on the Earth will be extinct. Not only life, but the Earth will also extinct someday and an asteroid could be the possible reason. Shocked to hear that? However, a car-sized asteroid slams into the Earth's atmosphere about once in a year. On the other hand, an asteroid large enough to threaten the existence of life on Earth arrives once in every few million years. Over 7 lakh asteroids that have been found in space.
Coming back to the asteroids 2019 QZ3, 2019 RG2 and 2019 QY4, the space rocks traveled towards Earth at the staggering speed at the staggering speed of 16,700 mph (26,800 km/h), 50,000 miles per hour (80,000 kilometers/hour) and 17,000 mph (27,000 km/h), respectively. However, all the asteroids zoom past the Earth with relatively safer distance.
According to NASA's Center for Near-Earth Object Studies (CNEOS), QZ3 was the biggest of the trio, with a diameter of 220 feet (67 meters), while RG2 and QY4 measured around 66 feet (20 m) and 52 feet (16 m) in length.
“Space rocks such as these, known as near-Earth objects (NEOS), are nudged by the gravity of neighbouring planets into orbital paths that carry them fairly close to our cosmic address. But "close" in space is a relative term: At the closest point in their passage, all three of today's asteroid visitors will be farther from Earth than the moon is,” NASA’s CNEOS said.