title: Janssen
text: # Janssen
  
  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
  