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A lepton with no electric charge. Neutrinos participate only in weak and gravitational interactions and are therefore very difficult to detect. There are three known types of neutrinos, all of which have very little mass.
- Browse Related Terms: Annihilated/annihilation, Antimatter, Antiparticle/antiquark/antielectron, Coupled to Radiation, Electromagnetic Force, Electron, Ion, Ionized, Muon, Neutrino, plasma, Positron, Radiation Gas
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A baryon with electric charge zero; it has the basic structure of two down quarks and one up quark (held together by gluons). The neutral component of an atomic nucleus is made from neutrons. Different isotopes of the same element are distinguished by having different numbers of neutrons in their nuclei.
- Browse Related Terms: Atoms, Baryon, deuterium, Extrapolate, Fission, Isotopes, Neutron, Nucleon, Nucleus/Nuclei, Primordial Nucleosynthesis, Synthesis of Nuclei
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Usually referring to the first value in a range, and denoted by a subscript, "0". For example, if something started off traveling 30 meters/second and ended up going 20 meters/second, then V0, or 'velocity nought' would be 30, and Vf , or 'velocity final' would be 20.
- Browse Related Terms: Dynamics, Finite, H0, Hubble Constant, Initial Conditions, Intensity, Light Year, Nought, static, Visible Universe
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Proton or neutron, part of atomic nucleus.
- Browse Related Terms: Atoms, Baryon, deuterium, Extrapolate, Fission, Isotopes, Neutron, Nucleon, Nucleus/Nuclei, Primordial Nucleosynthesis, Synthesis of Nuclei
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The process by which atoms are formed by the coming together of subatomic particles and other smaller atoms. This is called fusion, and occurs primarily in the intense heat of stars, except for the lightest elements which were formed in the Big Bang.
- Browse Related Terms: Angular resolution, Equilibrium, Feed, Fusion, hypothesis, initial, Kelvin, Mid-Class Explorer (MIDEX), Nucleosynthesis, Quantum Mechanics, Simultaneous
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(plural- nuclei; adjective- nuclear ) The center of an atom. Nearly 100% percent of the mass of an atom is contained in the nucleus. The nucleus is mainly composed of protons and neutrons.
- Browse Related Terms: Atoms, Baryon, deuterium, Extrapolate, Fission, Isotopes, Neutron, Nucleon, Nucleus/Nuclei, Primordial Nucleosynthesis, Synthesis of Nuclei