Spacecraft

"Nearly 15 years ago, a relatively small spacecraft about the size of a polar bear launched into space with a big mission: to map the entire sky at infrared wavelengths with a sensitivity up to hundreds of thousands of times better than previous surveys."https://www.caltech.edu/about/news/nasas-infrared-survey-telescope-ready-to-retire?utm_source=join1440&utm_medium=email&utm_placement=newsletter