Opera House Again

The Opera House was completed in 1973 and is one of the most easily recognised modern buildings in the world. The roof is made from pre-case concrete and the walls are mostly granite. The roof shells are sections of a 75 meter radius sphere, and the building covers 1.8 hectares and is 183 meters long and a maximum of 120 meters wide. The height is 65 meters.

My latest blog post: Think for Yourself: In the end, everything is just an opinion. Be skeptical, and think for yourself! (posted 2026-04-25).

My latest podcast: OJB's Podcast 2026-04-14 How Far is that Star?

If you're not sure what to view from my site, here are some suggestions: My Latest Airshow Report, My Favourite Wines and Beers, An Interesting Astronomical Observation, See Some Photos, Read Some Mac Tips.

Site News (Mobile): OJB's web site, v 2.4 which has major changes, and possibly errors! Please report anything to ojb@mac.com.