Seyfert galaxy - Wikipedia An active galactic nucleus (AGN) is a compact region at the center of a galaxy that has a higher than normal luminosity over portions of the electromagnetic spectrum. Galaxy - Wikipedia A galaxy is a gravitationally bound system of stars stellar remnants interstellar gas dust and dark matter. The word galaxy is derived from the Greek galaxias ... Astrophysics authors/titles "new" We present HST spectroscopy for 45 cataclysmic variables (CVs) observed with HST/COS and HST/STIS. For 36 CVs the white dwarf is recognisable through its broad Ly ... Hubble - News feed Two glowing nebulas in the Small Magellanic Cloud a dwarf galaxy that is a satellite of our Milky Way galaxy have been observed by NASA's Hubble Space Telescope. Aktiv galaxkrna Wikipedia En aktiv galaxkrna AGN r en kompakt region i centrum p en galax som har ovanligt hg luminositet ver delar av eller hela det elektromagnetiska spektrumet ... The Similarities of the Planets (and Other Celestial Objects) The planets (and other celestial objects) display a remarkable similarity at the phenomenological level.
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