This photograph has been taken during the observance of Mercury Transit across the Sun (on 9th May 2016). It was a part of the Orientation-cum-selection Camp for the XXI International Astronomy Olympiad (2nd May to 17 May 2016) from Indian participation. It was organized by the National Council of Science Museums (NCSM), Ministry of Culture, Govt. of India at their Bidhan Nagar campus, Kolkata.
<a href="//commons.wikimedia.org/wiki/User:Gangulybiswarup" title="User:Gangulybiswarup">Biswarup Ganguly</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>