NASA asteroid hunter

NASA has spent two years investigating the asteroids and comets of our Solar System. Their objective is to protect the Erth from the objects that could easily crash against the Erth. Because of that, NASA has carried out and investigation of two years with their Wide-Field Infrared Survey Explorer for Polling Near Earth Object (NEOWISE) and now we are able to know what they have found. According to NASA, NEOWISE has categorized 439 near objects to Erth (or NEOs, the name to describe any asteroid or comet approaching Erth). In the group of 439 objects, a total of 72 were unknowing for all the scientific world. 

The sounding line was thrown in 2009 to space and it was deactivated in 2011 when their mission was completed. But in December of 2013, it was reactivated to help astronomers to track NEOs and be aware if we run some risk of been impacted. During last year, NEOWISE collect about 5.1 millions of images and it also measured more than 19000 asteroids. Then, NASA could reduce the number to 439 NEOs that only 8 has been classification as potentially hazardous asteroids (PHAs). 

NEOWISE is not the unique ship that it's working to keep the NEOs under control. It's only a part of the system. NEOWISE discover NEOs that are big and dark and that kind of discovery help astronomers to complete the net of ground-based telescopes that work with visible wavelengths with light. 

As far as we think, the Solar System is a very crowded place. There are a lot of comets, meteorites, and asteroids that are plough through the universe. Having into a count the big distance presents in space, all of them comes from very far, many come from millions of light years away and there are some that approach only one time each long time. In this sense, the universe is full of life!
But, how many times we have think about a catastrophe produced by the impact of an enormous meteorite? Or how many films can we find about this kind of thematic? Only think about the main hypothesis we have today about the dinosaur extinction: the impact of a big meteorite. Because of that, NASA proposed to keep an eye in any NEOs that could complicate the life of our planet.