There are about 2 000 known asteroids that could hit our planet in the next few billion years, according to experts.However, the chance to actually be struck by one of them in the near future of the Earth is close to zero
Asteroids from the outer reaches of the solar system could be sent towards Earth by the star Gliese 710 - but only in 1.35million years
NASA revealed earlier this month that two space rocks are headed for Earth, although neither pose a threat to our planet.
Of all the asteroids that have been discovered, more than 1 650 are considered to be 'potentially dangerous' by Nasa - with only 157 above 3,000 feet in diameter.
An asteroid measuring 500 ft in diameter is most likely to touch land, with a chance that in 625 substitution, real life experts explain Lore in a YouTube video.
But it would be more than 160 years, until the asteroid hit the planet.
And a larger asteroid, measuring 4,200ft in diameter, is the third most likely to hit - but only has a one in 8,333 chance of striking in the year 2880.
Meanwhile, the star Gliese 710 - which will pass 77 light days from the Earth in 1.35million years - is set to send asteroids from the outer reaches of the solar system towards Earth, having a potentially catastrophic impact.
Of all the asteroids that have been discovered, more than 1,650 are considered to be 'potentially hazardous' by NASA - with only 157 larger than a kilometre in diameter
The asteroid destroyed 75 percent of life on Earth, including the dinosaurs.
The Earth is affected on average once a year by asteroid measuring about 13 feet in diameter - the size of an elephant.
The Earth is affected on average once a year by asteroid measuring about 13 feet in diameter - the size of an elephant.
Titanic asteroids over 10km in size are capable of wiping out life on earth - but the last one known to hit was 66 million years ago
However, it is rare for these to be witnessed by humans, as 70 per cent of the Earth is water - and many of these objects explode in the upper atmosphere.
Asteroids about 66ft in diameter - or the size of a six-storey building - hit the earth on average twice every 100 years.
Titanic asteroids over 6.2 miles in size are capable of wiping out life on earth - but the last one known to hit was 66 million years ago (stock image)
REDIRECT MISSION COULD SAVE EARTH FROM AN ASTEROID
Various techniques for deflecting a potentially hazardous asteroid could be tested to enable planetary defense capabilities.
These techniques include Ion Beam Deflection, Enhanced Gravity Tractor, and kinetic impactors.
In ion beam deflection, the plumes of the thrusters would go to the asteroid to push gently on its surface over a wide area.
A propeller bow pulling in the opposite direction would be necessary to maintain aconstant distance from the asteroid probe.
They can cause an explosion of 500 kilotons, or about 30 times the size of Hiroshima.
The last time an asteroid of this size hit was in 2013, over Chelyabinsk, Russia.
It exploded 18 miles above the ground and damaged over 7,000 buildings across six cities.
The Earth is hit on average once a year by asteroids measuring around 13ft in diameter - the size of an elephant. Meanwhile, asteroids around 25ft in diameter - which can cause an explosion the size of Hiroshima - strike the Earth once every four years on average
Asteroids about 66ft in diameter - or the size of a six-storey building - hit the earth on average twice every 100 years. They can cause an explosion of 500 kilotons, or about 30 times the size of Hiroshima
The approach to the deflection of the ion beam is independent of the size of the asteroid, and it could be shown on the option of the mission.
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n the approach of increased gravity tractor, the spacecraft would first take a rock from the surface of the asteroid mission Option B.
The spaceship with the collected rock would be orbiting in a circularhalo around the asteroid speed vector
The mass of the boulder coupled with the mass of the spacecraft would increase the gravitational attraction between the spacecraft and the asteroid.
By flying the spacecraft in close formation with the asteroid for several months the very small gravitational forces would produce a measurable change in the asteroid's trajectory.
A kinetic impactor could also be launched as a secondary payload with the spacecraft or on a separate launch vehicle, and it would collide with the target asteroid at high velocity while the spacecraft observed the impact.
The mass of the boulder coupled with the mass of the spacecraft would increase the gravitational attraction between the spacecraft and the asteroid.
By flying the spacecraft in close formation with the asteroid for several months the very small gravitational forces would produce a measurable change in the asteroid's trajectory.
A kinetic impactor could also be launched as a secondary payload with the spacecraft or on a separate launch vehicle, and it would collide with the target asteroid at high velocity while the spacecraft observed the impact.
They can cause an explosion of 500 kilotons, or about 30 times the size of Hiroshima.
The last time an asteroid of this size hit was in 2013, over Chelyabinsk, Russia.
It exploded 18 miles above the ground and damaged over 7,000 buildings across six cities.
The Earth is hit on average once a year by asteroids measuring around 13ft in diameter - the size of an elephant. Meanwhile, asteroids around 25ft in diameter - which can cause an explosion the size of Hiroshima - strike the Earth once every four years on average
Asteroids about 66ft in diameter - or the size of a six-storey building - hit the earth on average twice every 100 years. They can cause an explosion of 500 kilotons, or about 30 times the size of Hiroshima
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