Spacecraft such as Voyager, Pioneer, and New Horizons, launched decades ago to explore outer space, are now in interstellar space, and Pioneer 10 will have the earliest chance of encountering a star in 2029.
In a recent study submitted to the Publications of the Astronomical Society of the Pacific, a pair of researchers from the University of California, Los Angeles (UCLA) and the University of California, Berkeley (UC Berkeley) examine the likelihood.
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Radio signals sent to NASA spacecraft could have already reached four neighbouring star systems, and if any aliens tried to respond, we might hear from them within a few years from now
Radio signals sent to NASA spacecraft could have already reached four neighbouring star systems, and if any aliens tried to respond, we might hear from them within a few years from now