On January 11th 1909 James Nangle observed gamma Argus the star we today know as gamma Velorum using a 6.25 inch Thomas Cooke and Sons Telescope. He observed from his private observatory at Marrickville near Sydney, Australia. This was one of a series of double star measurements he was making.
In 1926 James Nangle would become the government astronomer.
He was making double star measurements. Gamma Velorum is the brightest and closest of the massive Wolf Rayet stars. These are stars that will destroy themselves in a supernova explosion in a few million years time.
www.theramblingastronomer.co.uk
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