The Journey of a Hero

The Voyager 2 space mission was launched in 1977, and the spacecraft is now far beyond the orbit of Neptune traveling on outward at a speed of about 60,000 kilometers per hour. At that rate, it will reach the outermost extremes of the Oort Cloud in about 20,000 years, and will be at the distance of the nearest star after roughly 75,000 years. Radio signals now take 11 hours to reach us from the little probe, but reach us they do. It is still sending information, using a transmitter with a power of about 25 watt. To know what it has seen, we need sensitive receivers as well as an 11 hours wait. Voyager is on an epic journey of a hero.


Carbon Dioxide Surface Layer Surface Temperature Solar System Active Surface 
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© Springer Science+Business Media, LLC 2008

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