There are multiple million asteroids which were noticed and cataloged by NASA, with an estimated 34,000 of them close to the orbit of the Earth.
Of those, almost 70 are thought-about giant sufficient to wreck the planet catastrophically, although scientists state that they nonetheless signify very distant probabilities. However as the most important asteroids work within the largest orbits, there are doubtlessly many extra which have but to be noticed.
With the current success of NASA’s DART mission displaying that these distant our bodies can have their orbits altered, there’s hope that someday humankind can avert a world catastrophe whereas on the similar time giving one other planet, like Mars, a meteor bathe to behold.