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Neutron stars

Peter Main takes us on a tour through the amazing properties of neutron stars, and illustrates them with calculations

The terms in bold link to topics in the AQA, Edexcel, OCR, WJEC and CCEA A-level specifications, as well as the IB, Pre-U and SQA exam specifications. A neutron star’s density, gravity, magnetism, and temperature are extremely large, while its luminosity and size are extremely small. As pulsars, neutron stars can be used in tests of general relativity.

Neutron stars are some of the strangest and most extreme objects in the universe. Each is a closely packed assembly of neutrons, like a giant atomic nucleus, the remnant of a supernova explosion. The density, gravity, magnetism and temperature are unimaginably large, while the luminosity and size are extremely small. As pulsars, neutron stars can be used in the most extreme tests of general relativity.

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Calculating information from graphs

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Prisms and spectrometers

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