Voyager program Voyager program The heliosheath is the zone between the termination shock and the heliopause at the outer border of the solar system. It lies along the edge of the heliosphere, a "bubble" caused by solar winds. ...more on Wikipedia about "Heliosheath"
The Voyager 1 spacecraft is an 815-kilogram unmanned probe of the outer solar system and beyond, launched September 5, 1977, and currently operational. It is the farthest human-made object from Earth. The Voyager 1 spacecraft has moved into the solar system's final frontier, a vast area where the Sun's influence gives way to interstellar space. At 14 billion kilometers (95 astronomical units or 8.8 billion miles) from the Sun, Voyager 1 has entered the heliosheath, a region beyond termination shock – the heliosheath is the shocked region between the solar system and interstellar space. If Voyager 1 is still functioning when it finally passes the heliopause, scientists will get their first direct measurements of the conditions in the interstellar medium. At this distance, signals from Voyager 1 take more than thirteen hours to reach its control center at the Jet Propulsion Laboratory, a joint project of NASA and Caltech near Pasadena, California. Voyager 1 is on a hyperbolic trajectory and has achieved escape velocity, meaning that its orbit will not return to the inner solar system. Along with Pioneer 10, the now deactivated Pioneer 11, and its sister ship Voyager 2, Voyager 1 is becoming an interstellar probe. ...more on Wikipedia about "Voyager 1"
The Voyager 2 spacecraft was launched in 1977. It is identical to its sister Voyager program craft, Voyager 1, but Voyager 2 followed a somewhat different trajectory during its Saturn encounter, bypassing a close encounter with Titan to take advantage of a gravitational slingshot to travel on to Uranus and Neptune. It thus became the first and so far only probe to visit those two planets and the first spacecraft to make the Grand Tour of Jupiter, Saturn, Uranus and Neptune. This was possible only due to a rare geometric arrangement of those four planets that only occurs once every 176 years ** . ...more on Wikipedia about "Voyager 2"
The Voyager program consisted of a pair of unmanned scientific probes, Voyager 1 and Voyager 2, launched in 1977. They were sent to study Jupiter and Saturn, using an advantageous planetary alignment of the late 1970s. However, the mission planners always had in the back of their minds a continued mission, and Voyager 2 also examined Uranus and Neptune. They were originally conceived as part of the Mariner program, being Mariner 11 and Mariner 12 respectively. The original program name was Mariner Jupiter-Saturn. It was later given the more appealing and romantic name "Voyager". ...more on Wikipedia about "Voyager program"
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