Eris has a super-cooled infrared sensor meant to detect heat radiated from a warhead against the cool background of space.

In the infrared part of the spectrum, Neptune's storms appear bright against the cooler background, allowing the size and shape of these features to be readily tracked.

At its heart is a super-cooled infrared sensor, which detects heat radiated from the warhead against the cool background of space.

The Focus was used in Vietnam during 1969 and 1970, primarily for night attacks when IR emitters stand out well against the cool background.

The display is eye-catching, with amber lettering on a cool blue-green background, but it is so large and distracting that it is hard to get used to.

It was a simple quotation, painted in tall, dark green letters on a cool gray background.

It also maintains a healthy, cool green background by planting exotic and rare plants while labeling them.

The 57 mannequins, showing clothes mainly from 1885 to 1905, are displayed in groups seen through a series of arches against a cool blue background.

They can be used to help pilots and drivers steer their vehicles at night and in fog, or to detect warm objects against a cooler background.

Against the cool white background, they hardly seem as utilitarian as they are.