May be since the early evolution of mankind - we humans always stare at the dazzling sky counting stars. We prayed the Sun, our Moon, the stars as our Gods. Our ancient civilizations had the idea of the planets - their positions and discoverd a science called astrology to guess the future - which still attracts attention from round the Globe. But since Gallileo discovered telescope and Copernicus , Keppler set forth planetray theories man's quest to know outside this Globe has intensified. And at the turn of 20th century Man was really unstoppable and started erasing the boundaries one by one - Its 50 years since First Human Journey into outer space - Yuri Gagarin , 41 years man set his foot on moon and we are continuing various missions to scan the outer space and looking for exoplanets - where civilizations may be existing. And there is one more silent spacecraft that is reaching places so far that no human made object has ever reached before.

More than 30 years after they left Earth, NASA's twin Voyager probes. Voyager 2 launched on Aug. 20, 1977, and Voyager 1 launched about two weeks later, on Sept. 5. Since then, the spacecraft have been traveling along different flight paths and at different speeds. Now some 17.4 billion kilometers (10.8 billion miles) from the sun and are now at the edge of the solar system. Not only that, they're still working. And with each passing day they are beaming back a message that, to scientists, is both unsettling and thrilling. The message is, "Expect the unexpected." Voyager 1 is the farthest human-made object from Earth. Voyager 2 is about 14.2 billion kilometers (8.8 billion miles) from the sun.