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The Pale Blue Dot is a photograph of Earth taken Feb. 14, 1990, by NASA’s Voyager 1 at a distance of 3.7 billion miles (6 billion kilometers) from the Sun. The image inspired the title of scientist Carl Sagan's book, "Pale Blue Dot: A Vision of the Human Future in Space," in which he wrote: "Look again at that dot. That's here. That's home. That's us."
What is the Pale Blue Dot?
The Pale Blue Dot is an iconic photograph of Earth taken on Feb. 14, 1990, by NASA’s Voyager 1 spacecraft.
Voyager 1 was speeding out of the solar system — beyond Neptune and about 3.7 billion miles (6 billion kilometers) from the Sun — when mission managers commanded it to look back toward home for a final time. It snapped a series of 60 images that were used to create the first “family portrait” of our solar system.
The picture that would become known as the Pale Blue Dot shows Earth within a scattered ray of sunlight. Voyager 1 was so far away that — from its vantage point — Earth was just a point of light about a pixel in size.
Animated GIF showing the family portrait image from the perspective of Voyager 1 in 1990.
This data visualization uses actual spacecraft trajectory data to show the family portrait image from Voyager 1's perspective in February 1990.
NASA/JPL-Caltech

Sagan’s Dream Shot
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Sagan played a leading role in the U.S. space program. The prominent planetary scientist was a consultant and adviser to NASA beginning in the 1950s. He briefed the Apollo astronauts before their flights to the Moon.
In his role as a visiting scientist at JPL, Sagan helped design and manage the Mariner 2 mission to Venus; the Mariner 9, Viking 1 and Viking 2 trips to Mars; the Voyager 1 and Voyager 2 missions to the outer solar system and the Galileo mission to Jupiter.
Sagan also was a member of the Voyager Imaging Team. He had the original idea in 1981 to use the cameras on one of the two Voyager spacecraft to image Earth. He realized that because the spacecraft were so far away the images might not show much. This was precisely why Sagan and other members of the Voyager team felt the images were needed — they wanted humanity to see Earth’s vulnerability and that our home world is just a tiny, fragile speck in the cosmic ocean.
On Feb. 13, 1990, Voyager 1 warmed up its cameras for three hours. Then the spacecraft’s science platform was pointed at Neptune and the observations began.
After Neptune, it took images of Uranus, Saturn, Mars, the Sun, and then Jupiter, Earth and Venus. The Earth images were taken at 04:48 GMT on Feb. 14, 1990, just 34 minutes before Voyager 1 powered off its cameras forever.
It took until May 1, 1990 — and four separate communications passes with NASA's Deep Space Network — for all the image data to finally arrive back on Earth. Voyager 1 had captured images of six of the seven planets targeted as well as the Sun.
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