Will we ever travel interstellar?
Ava Hudson
Updated on May 16, 2026
As of 2022, five uncrewed spacecraft, all launched and operated by the United States, have achieved the escape velocity required to leave the Solar System, as part of missions to explore parts of the outer system. They will therefore continue to travel through
interstellar space
In astronomy, the interstellar medium is the matter and radiation that exist in the space between the star systems in a galaxy. This matter includes gas in ionic, atomic, and molecular form, as well as dust and cosmic rays.
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