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:
“Someday soon, we hope that all middle and high school will have required courses in child rearing for girls and boys to help prepare them for one of the most important and rewarding tasks of their adulthood: being a parent. Most of us become parents in our lifetime and it is not acceptable for young people to be steeped in ignorance or questionable folklore when they begin their critical journey as mothers and fathers.”
—James P. Comer (20th century)
“Jane Addams, founder of Hull House, once asked, “How shall we respond to the dreams of youth?” It is a dazzling and elegant question, a question that demands an answer—a range of answers, really, spiraling outward in widening circles.”
—William Ayers, U.S. author. To Teach: The Journey of a Teacher, ch. 7 (1993)
“Does the road wind uphill all the way?
Yes, to the very end.
Will the day’s journey take the whole long day?
From morn to night, my friend.
But is there for the night a resting-place?
A roof for when the slow, dark hours begin,”
—Christina Georgina Rossetti (1830–1894)