Portal:Radiation astronomy/X-ray astronomy article/15

There are 88 official constellations that the International Astronomical Union (IAU) has used to divide the celestial sphere into 89 irregularly shaped boxes. The constellation Serpens is split into two separate sections, Serpens Caput (the snake's head) to the west and Serpens Cauda (the snake's tail) to the east. Using detectors placed above the Earth's atmosphere, X-radiation has been detected as incoming from each of these constellational areas. Searching for the first X-ray source per constellation is a history of science exercise that is still ongoing as the initial X-ray source for many of the constellations is questionable or unknown.