gamma neutron survey
71Naine blanche —  Ne pas confondre avec Étoile blanche de la séquence principale Sirius B est une naine blanche visible comme un petit point en bas à gauche de …
72Boron — (pronEng|ˈbɔərɒn) is a chemical element with atomic number 5 and the chemical symbol B. Boron is a trivalent nonmetallic element which occurs abundantly in the evaporite ores borax and ulexite. Boron is never found as a free element on… …
73Nuclear weapon — A bomb redirects here. For other uses, see A bomb (disambiguation). The mushroom cloud of the atomic bombing of Nagasaki, Japan on August 9, 1945 …
74Nuclear power debate — For nuclear energy policies by nation, see Nuclear energy policy. For public protests about nuclear power, see Anti nuclear movement. Three of the reactors at Fukushima I overheated, causing meltdowns that eventually led to hydrogen explosions,… …
75gravitation — gravitational, adj. gravitationally, adv. /grav i tay sheuhn/, n. 1. Physics. a. the force of attraction between any two masses. Cf. law of gravitation. b. an act or process caused by this force. 2. a sinking or falling …
76Greisen–Zatsepin–Kuzmin limit — The Greisen–Zatsepin–Kuzmin limit (GZK limit) is a theoretical upper limit on the energy of cosmic rays (high energy charged particles from space) coming from distant sources. The limit is 5×1019 eV, or about 8 joules. The limit is set by slowing …
77Extrasolar planet — Planet Fomalhaut b (inset against Fomalhaut s interplanetary dust cloud) imaged by the Hubble Space Telescope s coronagraph (NASA photo) …
78Zinc — This article is about the metallic element. For other uses, see Zinc (disambiguation). copper ← zinc → gallium ↑ Zn ↓ Cd …
79Gravitational wave — In physics, a gravitational wave is a fluctuation in the curvature of spacetime which propagates as a wave, traveling outward from a moving object or system of objects. Gravitational radiation is the energy transported by these waves. Important… …
80Formation des trous noirs — Trou noir Pour les articles homonymes, voir Trou noir (homonymie). Image simulée d’un trou noir stellaire situé à quelques dizaines de kilomètres d’un observateur et dont l’image se dessine …
