NASA is marking the United States' 250th birthday with four striking red, white, and blue images of deep space from the Chandra X-ray Observatory. The collection features an exploded star, a stellar nursery, a galaxy where stars are rapidly forming, and a galaxy cluster that provides evidence for dark matter. To mark the 250th anniversary of the United States, NASA has released four spectacular images of deep space from its Chandra X-ray Observatory, each presented in patriotic shades of red, white, and blue. Alongside the images, the agency also unveiled... [3139 chars]