H II Region

By Jesse Russell

High Quality Content by WIKIPEDIA articles An H II region is a large, low-density cloud of partially ionized gas in which star formation has recently taken place. The short-lived, blue stars forged in these regions emit copious amounts of ultraviolet light, ionizing the surrounding gas. H II regions-sometimes several hundred light-years across-are often associated with giant molecular clouds in which star formation takes place, and from which the stars that produce the H II region were born. The first known H II region was the Orion Nebula, which was discovered in 1610 by Nicolas-Claude Fabri de Peiresc.

• Format: Paperback
• Language: English
• ISBN: 5510522046
• ISBN13: 9785510522044
• Release Date: January 1
• Publisher: Book on Demand Ltd.
• Length: 78 Pages
• Weight: 0.43 lbs.
• Dimensions: 0.2" x 8.3" x 11.0"