NASA aircraft to fly over Chicago area once again Wednesday – NBC Chi…

A NASA aircraft that flew over parts of the Chicago area Tuesday will return to the region once again Wednesday and officials are urging people to be prepared for the potential noises.

NASA announced that its Armstrong Flight Research Center’s DC-8 aircraft will fly over the Chicago area “as part of a collaborative scientific research mission” aiming to measure “atmospheric emissions and reactions observed from megacities to marine areas.”

The aircraft was expected to arrive in the region between the mid-morning and mid-afternoon hours Monday or Tuesday, flying over both the city of Chicago and surrounding suburbs. It arrived just before noon Tuesday and traveled across parts of the city.

But NASA announced Wednesday morning that another trip was planned for the mid-morning and mid-afternoon hours.

NASA warned that residents “will see and hear the aircraft as it collects data on air quality and pollution sources.”

NASA officials emphasized that “all…