Toxic air pollutants are poisonous substances in the air that come from natural sources (for example, radon gas coming up from the ground) or from manmade sources (for example, chemical compounds given off by factory smokestacks) and can harm the environment or your health.
Subsequently, Scorpius X-1 was discovered in 1962 by a team, under Riccardo Giacconi, who launched an Aerobee 150 sounding rocket carrying a highly sensitive soft X-ray detector designed by Frank Paolini.
Scorpius X-1 was the first X-ray source discovered outside the solar system and it is the strongest source of X-rays in the sky, second only to the Sun. The X-ray flux is associated with the star V818 Scorpii, a blue variable which is the optical counterpart to Scorpius X-1.