NASA's Voyager I hit by third solar 'tsunami'

NASA's Voyager I spacecraft has been steadily journeying away from the sun to the outer reaches of the solar system since its 1977 launch. As it travels farther out and enters a different region of the solar system, it's occasionally affected by coronal mass ejections -- shock waves caused from massive violent eruptions from our sun. There have been three of these space "tsunamis" since 2012, and the third one -- described by NASA on Monday -- has helped the space agency confirm something it posited in late 2013: that Voyager is the first Earth craft to travel into interstellar space.

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