However, the amount of helium in the universe, as measured by spectroscopy, suggests that there are far more baryons in the universe than estimates based on galactic luminosity indicate.

然而，通过光谱学测量，宇宙中氦的数量表明，宇宙中重子的数量要比基于星系光度所估计的要多得多。

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Specifically, luminosity is proportional to radius squared.

具体来说，光度与半径的平方呈正比。

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FocusBlur: Makes an image out of focus with luminosity and depth.

FocusBlur：通过亮度和深度使图像失焦。

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The model corrected for possible distortions in luminosity resulting from non-economic sources like reflections on large bodies of water, which can distort satellite images.

FORBES: The Case for Keeping the Lights On

It is similar to a Hertzsprung-Russell (HR) diagram but the latter plots luminosity (or absolute magnitude) rather than just apparent brightness and a knowledge of the distances of the stars plotted is also needed.

ENGADGET: 9-gigapixel image of the Milky Way reminds us just how small we truly are

Though Dixon wears his eco credentials lightly, his crusade to make low-voltage lighting attractive is second to none, as illustrated by Luminosity, a collection of lamps, lights and shades that he also presented last month in Milan.

WSJ: Tom Dixon Makes Things Better