An article sent to arXiv, the famous archive of preprint, describes the discovery of an exomoon candidate. A team of researchers led by David Kipping of Columbia University conducted a search for moons orbiting exoplanets observed by NASA’s Kepler Space Telescope finding the candidate called Kepler-1625b I. Generally, research results are published on a scientific journal at the end of the work but rumors spread convincing the researchers to send an article at least to arXiv.