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• n  the quality of being luminous; emitting or reflecting light
  its luminosity is measured relative to that of our sun

• To the mass of untheological Christians, God has become, at best, a rather unfairly furtive presence, a lurking luminosity, a cozy thought.
• This will allow Kepler to spot planets by the previously invisible change in luminosity they cause as their orbit carries them around the facing side of their parent star.
• Zhang doesn't just act; she displays a smoldering luminosity that keeps the camera longing for her even after she has exited the scene.

• brightness
• brightness level
• luminance
• luminousness
• light

News & Articles

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• Flare star WX UMa becomes 15 times brighter in less than 3 minutes
  Astrophysicists have detected a star of low luminosity which within a matter of moments gave off a flare so strong that it became almost 15 times brighter. The star in question is the flare star WX UMa.
  June 14, 2013 - Science Daily

Quotes

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• Joyce Carol Oates in BBC News
  Writer Joyce Carol Oates, a friend of Updike's, said there was a "luminosity in John's style that was just extraordinary". "He also had a wonderful, warm, sympathetic sense of humour which people didn't always notice."
• Niel Brandt in PhysOrg.com
  While quasars are spectacular, they are not representative of typical active galactic nuclei,says Brandt. "Now, using Chandra and other X-ray observatories, we can find and study the moderate-luminosity, typical active galactic nuclei in...
• Peter Guber in Times Online
  Peter Guber, a film producer, told the paper: "It's like manifest destiny. At a certain point in somebody's career, Hollywood is an inevitable stop on the journey. Whatever the luminosity of these celebrities in New York or England or Paris, they...