Researchers say that the space craft will enter the interstellar space in about 4 years.

At present, Voyager is at the point where the velocity of solar winds is zero.

Voyager 1 was launched in 1977 and is build by NASA’s Jet Propulsion Laboratory, with an aim to collect data. It twin, Voyager 2 is not travelling as fast and will take few more years to reach the same point.

Landing will be at Vandenberg Air Force Base, California and is expected to take place any time between Friday and Monday, depending on the weather and other technical considerations.

Spacecraft is an Air Force Project
The space plane called X-37B was launched on April, 22. Since then it has been orbiting the earth executing its secret mission.

3rd Space Experimentation Squadron of the Air Force Space Command is operating the flight.