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Common Envelope Evolution
The evolution of interacting binary stars

Dirk Goës
Jun 18, 20259 min read


Interacting binary stars
Stars that pull each other apart, merge, and explode A still from an animation simulating a thermonuclear explosion occurring on the surface of a white dwarf star (right) while still pulling in gas from its companion red giant star (left) in binary star system T Corona Borealis ( Credit : NASA's Goddard Space Flight Center Conceptual Image Lab). By Dirk Goës A binary star system is one where two stars are gravitationally bound together and orbit each other in either circu

Dirk Goës
Apr 2, 20257 min read


Bessel to Gaia: Parallax comes full circle
Königsberg Observatory (left) where Friedrich Wilhelm Bessel made the first successful distance measurement to a star other than the Sun ( Credit : Wikipedia). The Gaia satellite (right) which has determined the distance to millions of stars to high degree of accuracy ( Credit : ESA/ATG medialab; background: ESO/S. Brunier). By Dirk Goës BSc(CompSc) UOW, MSc(Astronomy) Swinburne The observation phase of the European Space Agencies (ESA) groundbreaking Gaia mission ended on

Dirk Goës
Feb 17, 20255 min read


How do we know that the universe is expanding and accelerating?
A short explanation An image from a video visualisation of the expanding and accelerating universe ( Credit : NASA's Goddard Space Flight Center Conceptual Image Lab). By Dirk Goës BSc(CompSc) UOW, MSc(Astronomy) Swinburne About me: I have been a member of the Sydney City Skywatchers for two years. I am a member of the committee and am responsible for maintaining and improving the Skywatchers website. I recently graduated with a Master of Science (Astronomy) from Swinburn

Dirk Goës
Jan 8, 202511 min read
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