NASA’s Chandra X-ray Observatory recently celebrated 25 years of its launch. To mark the occasion, the space agency shared 25 pictures clicked by Chandra, including a picture of the NGC 6872, a spiral galaxy located in the Pavo (Peacock) constellation, snapped for the first time. These images are just a sample of almost 25,000 observations made by Chandra in its quarter-century in space. Here are 7 pictures clicked by Chandra.