| 11. | Astronomers quantify the brightness of celestial objects with a confusing term : magnitude.
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| 12. | He hopes to find pieces of the celestial objects for the museum's collection.
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| 13. | Take the case of the celestial object known as 1999 UX18.
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| 14. | The VLTI gives astronomers the ability to study celestial objects in unprecedented detail.
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| 15. | That is not the case for less round celestial objects.
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| 16. | The brighter the celestial object the smaller its absolute magnitude.
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| 17. | The mission ultimately yielded ultraviolet spectrum data and photographs of about 300 celestial objects.
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| 18. | The visibility of celestial objects in the night sky is affected by light pollution.
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| 19. | This allowed the color of celestial objects to be recorded.
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| 20. | The measurement of apparent magnitudes or brightnesses of celestial objects is known as UBV system.
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