"The Pale Blue Dot" is a famous photograph of Earth taken by the Voyager 1 spacecraft on February 14, 1990. From a distance of about 3.7 billion miles, Earth appears as a tiny speck in the vastness of space, highlighting its fragility and isolation. The image was captured at the request of the astronomer Carl Sagan, who wanted to emphasize the importance of caring for our planet. In his book titled "Pale Blue Dot: A Vision of the Human Future in Space," Sagan reflects on the significance of the photograph. He discusses humanity's place in the universe and the need for unity and stewardship of Earth, urging people to recognize the shared nature of our existence.