About 35 years ago.
Voyager I and II are pretty much on the edge of solar system.
voyager 1
The Voyager 1 spacecraft is a 722-kilogram (1,592 lb) space probe launched by NASA on September 5, 1977, to study the outer Solar System and eventually interstellar space. Operating for 33 years, 11 months and 12 days as of today (17 August 2011), the spacecraft receives routine commands and transmits data back to the Deep Space Network. It will be the first probe to leave the Solar System and is the farthest man made object from Earth.The two Voyager satellites have left the solar system and passed the "heliopause", the boundary layer between the solar system and deep space.V1 Launch Date: 1977-09-05 12:56:00 UTCV2 Launch Date: 1977-08-20 14:29:00 UTC
Voyager 1 and Voyager 2 have both left the heliosphere, but neither has left the solar system. The edge of the solar system is considered to be the outer boundary of the Oort Cloud, The exact width of the Oort Cloud is not known, but its estimated that it would take Voyager 2 about 300 years to reach the inner boundary of it. To reach the outer boundary of the Oort Cloud, truly leaving the solar system, would take Voyager 2 something like 30,000 years.
Voyager 1 and 2 were launched in 1977, and explored the outer planets during the 70's and 80's. They are still partially operational today, on their way out of our solar system. Voyager 1 is the most distant man made object to date, currently around 116 astronomical units from earth.
usually about 1and a half to 2 weeks after your first date
There are more than 52 moons in the solar system - Jupiter alone has 67 confirmed moons to date.
yes, for example us and the rest of the planets in the solar system. to date there are also approx 400 extra solar planets discovered (planets beyond our solar system)
On December 18, 2004, Voyager 1 passed the termination shock. This is the unofficial date of departure from the Solar System. Whilst the spacecraft still remains under the Sun's influence, at the termination shock particles from the interstellar medium interact with solar particles, signaling that the hypothetical heliopause is not far from this point. It did not discover anything, rather it inferred the existence of the heliosphere.
1399 and1990
"Voyager 1" is currently about 109.413 AU = 16 367 965 974 kilometers from Earth. "Voyager 2" is currently about 88.597 AU = 13 253 934 006 kilometers from Earth. They are both near the end of the solar system in an area called the heliopause.
Not in our solar system. Nor have any been found elsewhere to date.