Pale Blue Dot
Channel: all the knowledge of the universe PRINCIPIA
Date: 2022-01-22

Pale Blue Dot, by Wikipedia https://en.wikipedia.org/wiki?curid=1004014 / CC BY SA 3.0

#Photographs_of_Earth_from_outer_space
#Voyager_program
#1990_works
#1990_in_art
#1990s_photographs
#February_1990_events
#Color_photographs
Seen from about 6 billion kilometers （3.7 billion miles）, Earth appears as a tiny dot within deep space: the blueish-white speck almost halfway up the rightmost band of light.
Pale Blue Dot is a photograph of planet Earth taken on February 14, 1990, by the Voyager 1 space probe from a record distance of about 6 billion kilometers （3.7 billion miles, 40.5 AU）,
as part of that day's Family Portrait series of images of the Solar System.
In the photograph, Earth's apparent size is less than a pixel; the planet appears as a tiny dot against the vastness of space, among bands of sunlight reflected by the camera.
Voyager 1, which had completed its primary mission and was leaving the Solar System, was commanded by NASA to turn its camera around and take one last photograph of Earth across a great expanse of space, at the request of astronomer and author Carl Sagan.
The phrase "Pale Blue Dot" was coined by Sagan in his reflections on the photograph's significance, documented in his 1994 book of the same name.
In September 1977, NASA launched Voyager 1, a 722-kilogram （1,592 lb） robotic spacecraft on a mission to study the outer Solar System and eventually interstellar space.
After the encounter with the Jovian system in 1979 and the Saturnian system in 1980, the primary mission was declared complete in November of the same year.
Voyager 1 was the first space probe to provide detailed images of the two largest planets and their major moons.
The Voyager 1 spacecraft The spacecraft, still travelling at 64,000 km/h （40,000 mph）, is the most distant human-made object from Earth and the first one to leave the Solar System.
Its mission has been extended and continues to this day, with the aim of investigating the boundaries of the Solar System, including th...