(of cosmic radio emission)
31Active galactic nucleus — An active galactic nucleus (AGN) is a compact region at the centre of a galaxy which has a much higher than normal luminosity over some or all of the electromagnetic spectrum (in the radio, infrared, optical, ultra violet, X ray and/or gamma ray… …
32Comet Shoemaker–Levy 9 — D/1993 F2 (Shoemaker–Levy) Image of Comet Shoemaker–Levy 9 fragments (total: 21), taken on May 17, 1994 Discovery Discovered by: Carolyn Shoemaker Eugene M. Shoemaker David Levy Discovery date …
33Gurgen Askaryan — ( hy. Գուրգեն Ասկարյան , ru. Гурген Аскарьян or Гурген Аскарян ) (1928 1997) was a prominent Soviet physicist, famous for his discovery of the self focusing of light. Among his other achievements are the pioneering studies of light matter… …
34Quasar — This article is about the astronomical object. For other uses, see Quasar (disambiguation). Artist s rendering of ULAS J1120+0641, a very distant quasar powered by a black hole with a mass two billion times that of the Sun[1]. Credit: ESO/M.… …
35quasar — /kway zahr, zeuhr, sahr, seuhr/, n. Astron. one of over a thousand known extragalactic objects, starlike in appearance and having spectra with characteristically large redshifts, that are thought to be the most distant and most luminous objects… …
36Magnetosphere of Saturn — Aurorae on the south pole of Saturn as viewed by Hubble Internal field[1 …
37Brote de rayos gamma — Para grupo de hardcore punk, véase GRB (banda). Luminiscencia visible de GRB 970508 observada un mes …
38Voyager program — This article is about the unmanned space probes of the 1970s. For other uses, see Voyager. The trajectories that enabled Voyager spacecraft to visit the outer planets and achieve velocity to escape our solar system The Voyager program is a U.S… …
39Messier 87 — Virgo A The Messier 87 galaxy. Observation data Epoch J2000 Constellation Virgo Right ascension …
40Ionosphere — The ionosphere is a part of the upper atmosphere, comprising portions of the mesosphere, thermosphere and exosphere, distinguished because it is ionized by solar radiation. It plays an important part in atmospheric electricity and forms the inner …
