It was 20 years ago today that the first photo of earth from very, very, very far away was received. The image was from the Voyager 1 spacecraft that was nearly 4 billion miles away. The excitement of this moment of discovery wasn’t as great as the first dramatic photos of earth from the moon, but it does put things in greater prespective. With that little spec no more than a few pixels wide in the image, it wouldn’t have required too much more distance for the technology at the time to not even visually detect where it had come from.
Read more about that occasion in this feature from NPR.org.
