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| one of several hundred known celestial objects, generally believed to be rapidly rotating neutron stars, that emit pulses of radiation such as radio waves with a high degree of regularity |
| the boundary around a black hole on and within which no matter or radiation can escape |
| Scorpius (skôr'pē-əs) or Scorpio (skôr'pē-əs) Pronunciation Key
A constellation in the Southern Hemisphere near Libra and sagittarius. Scorpius (the Scorpion) contains the bright star Antares and is the eighth sign of the zodiac. |