The bad news is that an asteroid of city-killing proportions is heading in our direction, but the good news is that it’ll miss us on Saturday night by 3.2 million miles.
The space rock, known as 2002 NN4, generated enough scary headlines that NASA felt compelled to put out a reassuring note today. “There is no danger the asteroid will hit the Earth,” NASA said.
The asteroid has been described as being as big as the Empire State Building, but Bad Astronomy’s Phil Plait points out that one study estimates it as being even larger, with a diameter of 735 meters (2,400 feet). That’s not as big as the dinosaur-killing asteroid that struck 65 million years ago, but big enough to cause widespread destruction.
Researchers say it’s just a matter of time before a killer space rock is detected on a collision trajectory. That’s why NASA and other space agencies are planning missions such as Hera and the Double Asteroid Redirection Test, or DART, to see what it would take to divert a threatening asteroid. You’ll be hearing more about this during the buildup to Asteroid Day on June 30.
First of all, meteorites are foreign objects with different compositions. Some meteorites fell into the earth due to the gravity of the earth. When the meteorite enters the atmosphere, it will be affected by its own impulse and the atmosphere. After that, it will continue to shrink and the temperature will continue to increase. In this way, the body of a large meteorite is much smaller than the original meteorite. And the state of the flame generated by the heat when the meteorite rubs against the atmosphere is also the meteor we see. When the meteorite hits the earth, there will be only a small part. At the moment when the meteorite hits the earth, the meteorite will be torn apart, and only a small part of it will remain in the crater. Naturally, it looks like an empty crater. This is like you picking up a piece of soil and throwing it from a height, the soil will be torn apart and there will be only one shallow pit on the ground.
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