the final stage of stellar evolution in which a star collapses to a final state, as a white dwarf, neutron star, or black hole, when the star’s nuclear reactions no longer generate enough pressure to balance the attractive force of gravity.
the initial stage of stellar evolution in which interstellar gases and dust contract under gravity and condense into one or more stars.
noun, Physics. 1. constant of gravitation. See under . noun 1. the factor relating force to mass and distance in Newton’s law of gravitation. It is a universal constant with the value 6.673 × 10–11 N m² kg–2 G gravitational constant grav·i·ta·tion·al constant (grāv’ĭ-tā’shə-nəl) n. Abbr. G The constant in Newton’s law of gravitation that […]
noun, Physics. 1. the attractive effect, considered as extending throughout space, of matter on other matter. 2. the region surrounding an astronomical body in which the force of gravitation is strong. noun 1. the field of force surrounding a body of finite mass in which another body would experience an attractive force that is proportional […]
- Gravitational interaction
noun 1. an interaction between particles or bodies resulting from their mass. It is very weak and occurs at all distances See interaction (sense 2)
noun, Astronomy. 1. a heavy, dense body, as a galaxy, that lies along our line of sight to a more distant object, as a quasar, and whose gravitational field refracts the light of that object, splitting it into multiple images as seen from the earth. noun 1. (astronomy) a lenslike effect in which light rays […]