  In 2016, the Center for Planetary Science proposed a hypothesis arguing a
comet and/or its hydrogen cloud were a strong candidate for the source of the
Wow! Signal. From 27 November 2016 to 24 February 2017, the Center for
Planetary Science conducted 200 observations in the radio spectrum to validate
the hypothesis. The investigation discovered that comet 266/P Christensen
emitted a radio signal at 1420.25 MHz. The results of this investigation,
therefore, conclude that cometary spectra are detectable at 1420 MHz and, more
importantly, that the 1977 Wow! Signal was a natural phenomenon from a Solar
System body.
