An international team of astronomers led by Apostolos Christou at Armagh Observatory has made the first ever observation of one of the satellites of the planet Uranus passing in front of another. The observation was made on the night of May 4, 2007, by using the robotic Faulkes Telescope South at Siding Spring Observatory, Australia.

https://web.archive.org/web/20160701213854/http://www.arm.ac.uk/press/2007/uranus_event03.html

https://web.archive.org/web/20170701014326/http://star.arm.ac.uk/~aac/uranus/