Beatrice Hill was born on January 27, 1941 in England as a world war raged. Her family moved to New Zealand after the war and that's where she grew up, the middle child of three sisters. Beatrice was a superb linguist, talented musician, good athlete, and excellent writer. However what really interested her was astrophysics. That wasn't offered at the University of Canterbury in New Zealand, so as an undergraduate she studied mathematics, physics and chemistry, and then completed a master's degree.

She married Brian Tinsley, and they moved to Austin when he was offered a job at the University of Texas. However, she couldn't get a job, and being a faculty wife didn't suit her. Eventually, with great difficulty, she persuaded the University of Texas to accept her for a PhD. She had to teach herself the basics of astronomy before starting it, but got top grades in everything and completed the degree in record time.

Despite a growing reputation elsewhere, she continued to be ignored by the astronomy department in her own university. Finally, in 1975 she accepted Yale University's offer, leaving Texas to become Yale's first female astronomer professor.

Beatrice Tinsley was one of the great minds of 20th century astronomy. Her radical approach to galaxies and star populations was to consider them in an evolutionary sense. Her pioneering work, using data modelling, helped to lay the foundation for our understanding of galaxies. This in turn is essential to cosmology, because it relates to the origin and the future of the Universe. She was a leading expert in the field.

Sadly, her contribution to astrophysics was cut short by her death from cancer in 1981. Yet despite having entered the field late and her death at 41, her work output included around a hundred papers, most of them written solely by her. Her papers are still widely cited.

Mona Evans
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