Download or read book Sending Signals Into Space written by Mari Bolte and published by 21st Century Skills Library: A. This book was released on 2022-08 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Searching for signs of alien life is nothing new. Since the first believer, people have wanted to communicate with whatever might be out there. Learn about the satellites and observatories being used today to send and receive signals from space and find out if anything has responded to our call. Includes 21st Century Skills and Content, sidebars, activity, table of contents, index, and glossary.