(CHRISTIAN SCIENCE MONITOR) NASA‘s long-lived Voyager 1 spacecraft, which is heading out of the solar system, has reached a “magnetic highway” leading to interstellar space, scientists said on Monday.

The probe, launched 35 years ago to study the outer planets, is now about 11 billion miles from Earth. At that distance, it takes radio signals traveling at the speed of light 17 hours to reach Earth. Light moves at 186,000 miles per second.

Voyager 1 will be the first manmade object to leave the solar system.

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