A night of observing

At his Port Macquarie observatory, WJ Macdonnell used his Grubb refractor to observe and measure double stars, sunspots, planets and the satellites of Jupiter.

Watch the video to hear Hermann Wehner, an astronomical engineer and member of the Museum’s telescope conservation team, explain how Macdonnell set up his telescope to observe double stars.

Watch Hermann Wehner shows us how to use Macdonnell’s telescope   Zoom WJ Macdonnell with his newly erected refractor telescope, about 1885