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Since 1970, special satellites have been put into orbit to study X-rays from the Sun, stars, and galaxies. These include the Chandra X-Ray Observatory and the Röntgen Satellite. Many X-ray sources are believed to be gas falling into neutron stars and black holes.
The Union Jack marks New Zealand's historical links with Britain. The stars represent the Southern Cross. Effective date: 12 June 1902.
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