John V. Higginbotham 
The European Space Agency or ESA has created an informative video that details what would happen in case a decent-sized asteroid hit one of the continent’s major cities. Recently, one such asteroid passed by Earth at a distance of around 4.5 million miles. It has been designated QQ23 2006 and is the size of a very tall skyscraper or two.
Constant threats from space
Such an object would not be capable of causing a mass extinction event but it would have the power to completely raze a large city and its surrounding area, killing millions in the process.
NASA boasts an early warning system that comes from its tracking array of Near-Earth objects. These are big rocks that have the potential to impact the planet and there are around 20.000 of them.
European early warning system
In case the early warning system from NASA fails, people would only have days to evacuate their homes. The ESA wants its own measure of detection for Near-Earth Objects and the organization is launching a 1 million Euro satellite to accomplish just that.
The satellite has been designated Flyeye and will launch next week. The satellite will observe the solar system with the objective of alerting European authorities toward any hazardous Near-Earth Object. The main goal of the mission is to provide as much time as possible for security measures to be taken.
Chilling ESA video
The ESA released a video that presents a hypothetical situation where an asteroid impacts Earth in 2028. The asteroid is said to be as big as a city block, which is around 200 meters.
The situation presented in the video states that the asteroid will hit in 24 days and will impact anywhere between Copenhagen and Tokyo, which is an extremely wide margin.
Scientists go back and forth on the specifics of the asteroid impact and an alternative situation is presented with the introduction of ESA’s Flyeye that severely narrowed the impact location.
