Journey
Voyager 1 was launched in 1977, passed the orbit of Pluto in 1990, and left the solar system (in the sense of passing the termination shock) in November 2004. It is now in the Kuiper Belt. In about 40,000 years, it and Voyager 2 will each come to within about 1.7 light-years of two separate stars: Voyager 1 will have approached star Gliese 445, located in the constellation Ophiuchus; and Voyager 2 will have approached star Ross 248, located in the constellation of Andromeda.
In March 2012, Voyager 1 was over 17.9 billion km from the Sun and traveling at a speed of 3.6 AU per year (approximately 61,000 km/h (38,000 mph)), while Voyager 2 was over 14.7 billion km away and moving at about 3.3 AU per year (approximately 56,000 km/h (35,000 mph)).
Voyager 1 has entered the heliosheath, the region beyond the termination shock. The termination shock is where the solar wind, a thin stream of electrically charged gas blowing continuously outward from the Sun, is slowed by pressure from gas between the stars. At the termination shock, the solar wind slows abruptly from its average speed of 300–700 km/s (670,000–1,600,000 mph) and becomes denser and hotter.
Read more about this topic: Voyager Golden Record
Famous quotes containing the word journey:
“So every journey that I make
Leads me, as in the story he was led,
To some new ambush, to some fresh mistake:
So every journey I begin foretells
A weariness of daybreak, spread
With carrion kisses, carrion farewells.”
—Philip Larkin (1922–1986)
“The time passes so quickly during these full and active middle years that most people arrive at the end of middle age and the beginning of later maturity with surprise and a sense of having finished the journey while they were still preparing to commence it.”
—Robert Havighurst (20th century)
“I have had the accomplishment of something like this at heart ever since I was a boy.... So I feel tonight like the man who is lodging happily in the inn which lies half way along the journey and that in time, with a fresh impulse, we shall go the rest of the journey and sleep at the journey’s end like men with a quiet conscience.”
—Woodrow Wilson (1856–1924)