| 释义 |
metagalaxy Astr.|mɛtəˈgæləksɪ|
[f. meta- 1 + galaxy n.]
The entire system of galaxies (see quot. 1930); also, a cluster or group of galaxies. So metagaˈlactic a.
1930H. Shapley Flights from Chaos xiii. 141 Corresponding to individual stars, multiples, and star clusters we have galaxies, multiple galaxies, and clusters of galaxies... To designate the system including all of these I propose to use Lundmark's term, the Metagalactic system—or, more briefly, the Metagalaxy. 1951Astron. Jrnl. Apr. 47/2 (heading) Differential rotation of the inner metagalaxy. 1957H. Shapley Inner Metagalaxy p.v, The terms ‘Metagalaxy’ and ‘metagalactic’ refer to the total recognized assemblage of galaxies. The Metagalaxy includes also whatever there may be in the way of gas, particles, planets, stars, and star clusters in the spaces between the galaxies. It is essentially the measurable material universe. 1965Rev. Mod. Physics XXXVII. 654/1 In principle there may be several condensations of the initial plasma so that there may be other metagalactic systems in the universe. Ibid. 663/2 According to Klein there may be other metagalaxies in the universe. 1965J. D. North Measure of Universe ii. 20 His prediction of a high collision rate between the nebulae of a single metagalaxy. Ibid. App. 408 The galaxies assigned to the Local Group increased in number and the ‘local metagalaxy’ took its place with the other known clusters. 1970Nature 12 Dec. 1069/1 According to this scheme, an initial contraction of the metagalaxy (containing equal amounts of matter and antimatter) resulting from its self-gravitation was turned into an expansion by the pressure of radiation produced by annihilation reactions. Ibid., Although the gravitational and radiation fields in this case are metagalactic, the scale of the matter-antimatter separation is determined by the magnetic field and is likely to be much more local. |