No one really knows how to name exoplanets
Artist's impression of a transiting Jupiter-mass exoplanet around a star slightly more massive than the Sun, such as the one discovered around SWEEPS-04. (nasa.com)

Naming new worlds is a confusing mess ESA/Hubble An exoplanet by any other name... 55 Cancri e, or Rho Cancri e, or Janssen, is one of the thousands of exoplanets stuck with multiple names because of inconsistent naming systems. 55 Cancri e is experiencing a bit of an identity crisis. The planet, which orbits a star…