Is There Life in Outer Space?

The third book in a series about scientific wonder. Dreaming, daring, thinking, and doing. For researchers ages 6 years and up. The seventies. Astrobiologist Carl Sagan is looking for ways to get in contact with extraterrestrial life. When NASA sends satellites to the back of the solar system —and even further— Carl takes his chance: he launches all kinds of sounds and images from planet Earth into space. How did he do that? And where are they going to end up?