| 41. | The findings emerged from a study of more than a century's worth of astronomical observations.
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| 42. | Many astronomers patronized by kings carried out astronomical observations.
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| 43. | In 1968 he became professor of astronomical observation technique.
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| 44. | -- Can we use astronomical observations to determine the geometry of space-time around a black hole?
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| 45. | Geodesy, geometry on the sphere, astronomical observations; 3-2.
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| 46. | The radiometer could not conduct multi-band astronomical observations.
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| 47. | Astronomical observations were originally made using visible light.
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| 48. | At least three are necessary for astronomical observations.
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| 49. | Astronomical observations have recently suggested that the ices of large comets are rich in organic chemicals.
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| 50. | Hornsby made tens of thousands of astronomical observations.
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