William H McCrea

William Hunter McCrea. (1904 - 1999). Irish-English astronomer and mathematician.

Noteworthy

He was born in Dublin in Ireland on 13 December 1904.
His family moved to Kent in 1906.
From 1930 he lectured in Mathematics at the University of Edinburgh.
In the Second World War he was co-opted onto the Admiralty Operational Research Group.
Discovered that three-quarters of the Sun is made of hydrogen, and about one quarter is helium, with 1% being other elements. Previous to this many people thought the Sun consisted mostly of iron.