News about asteroids hitting the Earth appears frequently, but many of them just pass by the Earth and do not actually hit the Earth. So how do we determine whether the asteroid will collide with the Earth? Woolen cloth? So let’s reveal the answer to everyone with the help of constellation knowledge! Let’s take a look!
How to determine whether an asteroid will collide with the Earth? According to reports, when people search for "asteroid" in search engines, a large number of related news about "asteroids may collide with the Earth" will appear. For example, "NASA warns that 2-mile-wide 'killer' asteroid is hurtling toward Earth," or "...potential impact date is 2022," or "Asteroid impact triggers tsunami." ..could destroy U.S. coasts." and "...monster rocks hurtling toward Earth at 17,000 mph."
And these are just some of the news released in a short period of time. Reading these alarming headlines usually reveals mostly accurate information about asteroids, which certainly shows that an asteroid isn't going to hit Earth anytime soon. The misleading headlines and stories exploit the words scientists use to talk about space objects and what some of those words mean in everyday language.
For example, the phrases "near-Earth object" (NEO) and "potentially hazardous asteroid" (PHA) are astronomical terms used to classify objects with very specific definitions. If an asteroid is within 4.6 million miles of Earth and has a certain brightness, it will be classified as a PHA. It's really just a way for astronomers to create a vast catalog of worthy objects. No other assessment will be done to determine the asteroid's "potential hazard" before it is named.
NEO falls into a broader category. This is a general term for asteroids, comets, and large meteoroids whose orbits intersect with the Earth's orbit and therefore pose a risk of impact.
Some news media have sounded the alarm about the arrival of asteroid 2006SF6, which flew close to the Earth. This certainly sounds like a harbinger of danger, but in a report maintained by the European Space Agency (ESA) In the list of "All celestial bodies that have detected non-zero collision probability", search for 2006SF6 and its catalog number 481394, and nothing appears. It can be seen that it does not seem to be included in the list of 991 space objects with the greatest threat.
Next, media members continued to check the public database on asteroids maintained by the Near-Earth Research Center of NASA's Jet Propulsion Laboratory, and then obtained more information about 2006 SF6. NASA estimated that this The diameter of the asteroid ranges from 919 to 2,690 feet (280 to 820 meters).
An impact with such a skyscraper-sized space rock could cause some real damage to Earth. But when 2006SF6 is closest to Earth, it is about 11.23 Earth-Moon distances, which is about 2.7 million miles (4.3 million kilometers). Therefore it poses almost no threat to the earth. However, some major threats may come from objects not listed on the list.
For example, in 2013, a small asteroid fell into the sky over Russia and exploded, injuring about 1,200 people there. The space rock has never been observed before exploding.
The technology used by astronomers has improved to the point that new near-Earth objects are being discovered every day. This includes some objects that are actually very close to Earth, although some are so small that if they did hit Earth, they would probably mostly burn up in the atmosphere.
The first step of the simulated response is to aim the astronomical telescope at the most threatening celestial body based on the preliminary calculation results in order to accurately calculate its flight speed and trajectory; the second step is to formulate a corresponding strategy: to force the incoming Deflect the direction of the attacking celestial body, or evacuate the people in the threatened area as soon as possible? If the "enemy" is less than 50 meters in diameter, the current scientific consensus is to evacuate the crowd. According to one scientist's statement, it is now possible to arrive at the area where the asteroid will hit two weeks in advance; a few days in advance, the specific affected area can be narrowed down to a radius of several hundred kilometers. To deal with larger celestial bodies, can we launch nuclear weapons to destroy them like the plot of some science fiction movies? Scientists believe that this is a bad idea, because it may "break it into pieces" and produce smaller but still dangerous celestial debris. The currently accepted solution is to launch some kind of device to the target object to force it to deviate from its original orbit, like a "cosmic bumper car." NASA plans to conduct this type of "collision" test with a real celestial body with a diameter of 150 meters in 2022. However, when the "planetary defense" plan discussed in the scientific community is actually implemented, there is a potential controversy, that is, "who will make the decision?" Difficulties that may be involved include whether developed countries are willing to fund such operations if they are not affected by the disaster. Romana Kovler, an expert at the United Nations Office for Outer Space Affairs, said that on this issue, "the current common sense is to leave it alone."
Recommended related articles: How many galaxies are there in the universe? Do you know the largest galaxy in the universe, which planet has the largest constellation, knowledge about the Milky Way and the solar system, which main star is in which house, the best main star is in different houses, the meaning of the horoscope ten Detailed explanation of what the second house represents and the twelfth house
Singularity Constellation Network is an encyclopedia of constellation knowledge that many girls will pay attention to.
Bazi marriage, horoscope career, marriage fortune, wealth fortune sign, emotional horoscope, seeing your partner, horoscope calculation, name speed matching, life fortune, reunion opportunities, you can also consult the Singularity Horoscope website online at the bottom.