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:
“He was calm; however, he had to be supported during the journey through the long corridors, since he planted his feet unsteadily, like a child who has just learned to walk, or as if he were about to fall through like a man who has dreamt that he is walking on water only to have a sudden doubt: but is this possible?”
—Vladimir Nabokov (1899–1977)
“A journey of a thousand miles begins with a single step.”
—Chinese proverb.
Lao-tzu.
“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)