temps (durée) (1) région (1) radioactivité (1) radio (1) processus physique (1) évolution (1) environnement (1) émission (1) Decay (1) Observations (1) Observations (1) Identification (1) Time (1) Telescopes (1) Stars (1) Sky (1) Respect (1) Relativity (1) Radioactivity (1) Radioactive decay (1) Radio (1) Neutron stars (1) Nature and nurture (1) Masses (1) Identification (1) Hypothesis (1) Gravitational waves (1) Evolution (1) Euthenics (1) Ecology (1)