Can an object near Earth be DANGEROUS? This is how NASA wants to stop scary comets, asteroids

Asteroids and comets are the near-terrestrial object that can even hit the planet. However, according to NASA, no known asteroid poses a significant risk of colliding with Earth in the next 100 years.

Galaxies, planets, stars, sun, asteroids, moons and what not! The space is full of so many objects. Even each object has a different nearby object. Earth also has objects nearby, which are sometimes even attracted to the planet due to gravity. However, not every object near Earth manages to reach the planet’s surface. The object must be large enough to survive the fire that begins to penetrate the Earth’s atmospheric layer. But wait, do you know what a near-terrestrial object is?

Asteroid or comet that can pass within 30 million miles or 50 million kilometers of Earth’s orbit is known as a near-Earth object or NEO. According to NASA, “a near-Earth object (NEO) is an asteroid or comet whose orbit it brings within a zone of about 121 million miles (195 million kilometers) from the sun, meaning it is within about 30 million miles (50 million kilometers) kilometers) can pass. million kilometers) of Earth’s orbit.”

NASA went on to say that the vast majority of NEOs entering Earth’s atmosphere decompose before reaching the surface (and more than 100 tons of dust particles disintegrate in Earth’s atmosphere every day), creating NEOs larger than about 98 to 164 feet (30 to 50 meters) tall and can cause widespread damage in and around their impact sites. A Potentially Hazardous Object (PHO) is a near-Earth object whose orbit takes it within 7.5 million km of Earth’s orbit and is larger than 140 meters.

Also read: Forget asteroids, comets, solar storms, NASA is GREAT about this

It may be known that like the planets, asteroids and comets also revolve around the sun. Some of the smaller moons of other planets may be trapped asteroids. Most asteroids are located in what is called the “main belt” between Mars and Jupiter. The vast majority of asteroids near Earth come from the inner part of the main belt where their orbits have been altered over tens of millions of years by the gravitational pull of Jupiter and Mars, and some by mutual collisions.

How often do nearby terrestrial objects come close to Earth?

Several times a month, small asteroids several meters in size are detected passing between the Earth and the Moon’s orbit. Meteoroids — tiny fragments of asteroids and comets less than 1 meter in size — hit Earth’s atmosphere and explode almost every day, leaving the bright meteor events humans see at night and sometimes remnants — meteorites — on the ground. The Center for NEO Studies at the Jet Propulsion Laboratory maintains close proximity tables that are updated daily, NASA said.

To date, no known asteroid poses a significant risk of colliding with Earth in the next 100 years. The highest impact risk for a known asteroid is a 1 in 714 chance of impacting an asteroid that was named FD in 2185 in 2009. This means that the probability that it could impact is less than 0.2 percent . NASA said: “An asteroid that NASA is studying closely, called Bennu, has a 1/2700 chance of hitting Earth between 2175 and 2195. The OSIRIS-REx spacecraft will complete a 2-year survey of Bennu before a sample from an asteroid, material is picked off the surface and returned to Earth.”

Also read: James Webb Space Telescope captures glowing Jupiter in its infrared gaze

How can we prevent an asteroid from hitting Earth?

Currently, an asteroid impact is the only natural disaster that NASA can potentially prevent. There are a few methods NASA is studying to deflect an asteroid on a course to hit Earth. One of these techniques is called a gravity tractor – it involves a spacecraft that would collide with an asteroid (but not land on the surface) and maintain its relative, optimal position to use the mutual gravitational pull between the satellite and the asteroid to slowly change the course of the asteroid.

A kinetic impactor is currently the simplest and most technologically mature method available for defending against asteroids. This technique launches a spacecraft that simply blasts itself into the asteroid at a speed of several kilometers per second. Nuclear explosive methods are considered the last resort when it comes to NEO deflection, although they may be the most effective at preventing a catastrophic event. When the warning time is short or the asteroid is large, deploying a nuclear device is the most effective option.

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