LAS CRUCES, N.M., March 20 (UPI) -- The U.S. Voyager-1 spacecraft launched in 1977 may have left the solar system, some scientists say, and if so would be the first man-made artifact to exit.
After traveling for 35 years, the space probe appears to have traveled beyond the influence of the Sun and exited the heliosphere, the region of space dominated by the Sun and its wind of energetic particles, a study to be published in the journal Geophysical Research Letters indicates.