41. In the domain of Space Weather BIRA-IASB focuses on ionising space radiation and its effects. 42. :I used to work in a laboratory that used de-ionised water in industrial quantities. 43. Such " He II regions " are rare and indicate an extremely hot ionising star. 44. Part of the nebula is ionised by the youngest ( bluest ) heavy stars in Pismis 24. 45. A small electric voltage is applied to the ionised air which gives rise to a small electric current. 46. The atom is not ionised , and the gamma ray continues on, although at a lower energy. 47. Spectroscopic observations thus showed that planetary nebulae consisted largely of extremely rarefied ionised oxygen gas ( OIII ). 48. This makes H II regions more complicated than planetary nebulae, which have only one central ionising source. 49. The Homunculus Nebula is a small H II region, with gas shocked into ionised and excited states. 50. A key design goal is that each original ionising event due to incident radiation produces only one avalanche.
