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Bortle dark-sky scale

noun

a classification of nighttime darkness for amateur astronomers; a nine-level numeric (and color coded) measure of the night sky brightness of a particular location

Examples

John Bortle created a light pollution scale for the February 2001 edition of Sky and Telescope.

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Examples from the Web for boon companion
Historical Examples
  • While speaking or rather hissing those words, the boon companion underwent much such a change as one reads of in fairy-books.

    The Confidence-Man Herman Melville
  • This dog, his boon companion, he would present to the Crown Prince.

    Long Live the King Mary Roberts Rinehart
  • It flashed upon her that this man—Roxdal's boon companion—must know far more than he had told to the police.

    The King of Schnorrers Israel Zangwill
  • He drank enormous quantities of brandy, and was a boon companion of Coupeau.

    A Zola Dictionary J. G. Patterson
  • It was from his boon companion, Egremont, who was doing Long Branch.

    Jolly Sally Pendleton Laura Jean Libbey
  • Leastwise, he ain't what you'd go so far as to call a boon companion.

    Faro Nell and Her Friends Alfred Henry Lewis
  • Ikey was ready to meet them more than half way, and before long became their boon companion.

    The Story of the Big Front Door Mary Finley Leonard
  • It is your pride to have been their associate and boon companion.

    Davenport Dunn, Volume 1 (of 2) Charles James Lever
  • He was quite a boon companion, and had a marked objection to retiring to rest before daylight.

  • He was not only the boon companion of princes, but he was the prince of boon companions.

    The Magnificent Montez Horace Wyndham

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Word Value for boon

6
8
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