Andrew David Thackeray (19 June 1910 – 21 February 1978),[1][2] was an astronomer trained at Cambridge University.
Thackeray went to school at Eton College, where he observed meteors for the British Astronomical Association.
[2] He received a PhD on theoretical stellar spectroscopy in 1937 from the Solar Physics Laboratory in Cambridge.
[4] He became an honorary professor of the University of Cape Town and, a few days before his death, an Associate of the Royal Astronomical Society.
At a conference of the International Astronomical Union in Rome in 1952, he presented results of studies of variable stars in the Magellanic Clouds, indicating that the perceived age and size of the universe had to be doubled.