Some asteroids appear out of nowhere as they are plotted only when they were discovered.
Most asteroids plotted were discovered only during the previous year.
Although none of the plotted objects came inside the orbit of our Moon, our Solar System is filled with objects as small as bits of sand, usually left by a comet, that appear as meteors as they streak into the Earth's atmosphere every day.
The only objects displayed are those visible from Earth closer than 20 million kilometers, color coded by three-dimensional distance.
In comparison, the Earth is a relatively small target having a radius of about 6,400 kilometers.
