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date: 28 November 2021

p. 11. Journey to the centre of the universelocked

p. 11. Journey to the centre of the universelocked

  • Frank Close

Abstract

‘Journey to the centre of the universe’ provides a general introduction to particles, matter, and the universe. Atoms are composed of electrons orbiting a dense central nucleus. The space between these components is filled with electrical and magnetic fields, which give atoms solidity despite their vast gaps. The protons and neutrons in the nucleus are made up of two kinds of quark. Protons can be converted to neutrons (and vice versa), creating neutrinos. These elementary particles are acted upon by four forces — strong force, weak force, electromagnetic force, and gravity. Particle accelerators have provided insights into the creation of matter during the Big Bang, showing that other particles once existed.

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