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.
The history of the star: Dschubba. from p.369 of Star Names, Richard Hinckley Allen, 1889. [A scanned copy can be viewed on this webpage] Delta (Î´) Scorpius, Dschubba, is a star on the forehead of the Scorpion. Dschubba is found in the Whitall Planisphere, probably from Al Jabhah, the Front, or Forehead, where it lies. In the Palermo Catalogue the title Iclarkrav is applied to a star whose assigned position for the year 1800 would indicate our delta (Î´ Dschubba).