When asked pointedly, none of the parties could answer as to what a solar observatory is exactly. They all admitted that the word “solar observatory” has not been defined in any of the English Dictionary of repute. Learned counsel for the Commission was also at loss to convey the meaning of `solar observatory’, i.e., whether it is related to study of Sun or study of time based on Sun. Learned counsel for the petitioners, relying upon its definition available on the Wikipedia, submitted that a solar observatory is an observatory that specializes in monitoring the Sun. However, the Wikipedia not being an authorised source, this Court is not inclined to go by this definition. In the “Rajasthan Ka Itihas and Sanskriti”, a Class X book published by the Rajasthan Board of Secondary Education, Ajmer, the Jantar Mantar, Jaipur has been classified as one of the five Astronomical Observatories established by Maharaja Sawai Jai Singh-II. Similarly, the official website of the UNESCO as also the official website of the Rajasthan Tourism Department have reckoned the Jantar Mantar, Jaipur as an astronomical observatory whereas, as per the official government website, i.e., museumrajasthan.gov.in, the Jantar Mantar, Jaipur is one of the five solar observatories founded by Maharaja Sawai Jai Singh. Thus, there is conflicting opinion available in the standard book/official websites of different government bodies/organisations.