When we look at clouds in our sky, we can sometimes make out shapes. This is called pareidolia, where the human brain finds shapes or patterns hidden in random images. This can also happen with nebulas – clouds of dust and gas in space. There are two main types of nebulas; bright and dark. There are four types of bright nebulas; emission, reflection, planetary and supernova remnants. This book covers 14 strange and interesting nebulas in our galaxy. Find out more about these fun nebulas in this short 15-minute book. Ages 8 and up. All measurements in American and metric. Reading level: 6.9 LearningIsland.com believes in the value of children practicing reading for 15 minutes every day. Our 15-Minute Books give children lots of fun, exciting choices to read, from classic stories, to mysteries, to books of knowledge. Many books are appropriate for hi-lo readers. Open the world of reading to a child by having them read for 15 minutes a day.