Northern Irish astronomer. In 1967 she discovered the first pulsar (rapidly flashing star) with British radio astronomer Antony Hewish and colleagues at the Mullard Radio Astronomy Observatory, Cambridge, England.
Green expresses hope. White symbolizes peace. It is said that the saltire may have been based on the former flag of Belgian airline, Sabena. Red represents the blood shed in the struggle for independence. Effective date: 27 September 1982.