Janssen may refer to: Astronomy. Janssen (lunar crater) Janssen (Martian crater) Janssen (planet), an exoplanet also known as 55 Cancri e. Other. Janssen (surname) is a common Dutch surname, cognate of "Johnson" Janssen Biotech, American biotechnology company. Janssen COVID-19 vaccine, a COVID-19 vaccine. Janssen Pharmaceuticals, a Belgian company. USS Janssen (DE-396), World War II US Navy destroyer escort. E. Janssen Building, a historic building in Eureka, California. See also. Jansen (disambiguation) Janssens
https://en.wikipedia.org/wiki/Janssen