Even though there are many people who are trained to locate objects in space that could potentially cause harm to the people on Earth, there's a lot of space to cover and some asteroids just seem to come out of nowhere.
To help researchers find asteroids that could collide with Earth, Asteroid Zoo is a project that's a lot like Tomnod, in which anyone can search the raw images from telescopes to pinpoint objects of interest. When looking at the space images, there's the option to tag objects as an "asteroid" or an "artifact." It takes the eyes of an eagle to make a notable discovery, but that's just another purpose of the project, finding people to aid with future space exploration.
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