Crossword-Solution: THEBIT 6 letters, 2 clues 🏆 scrabble score: 11

Like the larger enclosures, these smaller objects frequently encroach upon each other-- crater-ring overlapping crater-ring, as in the case of Thebit, where a large crater, which has interfered with the continuity of the east wall, has, in its turn, been disturbed by a smaller crater on its own east wall.

East of Thebit lies the celebrated "lunar railroad," a straight, isolated wall about five hundred feet high and sixty-five miles long, dividing at its southern end into a number of curious branches, forming the buttresses of a low mountain.

The causes of the precession of the æquinoxes and the progression of the fixed stars, and of the change, moreover, in the declinations of the sun and of the tropicks, must be sought from magnetick influences; so that neither that absurd motion of trepidation of Thebit Bencora[197], which is at great variance with observations, nor the monstrous superstructures of other heavens, are any longer needed.

Among problems of interest that were solved may be mentioned the determination of the length of the year by Albategnius and Thebit Ben Corrah; and increased accuracy was given to the correction of astronomical observations by Alhazen's great discovery of atmospheric refraction.

Among the many globes which he constructed our museum possesses one of surpassing excellence, in that it exhibits, in addition to other movements, that which astrologers call the movement of trepidation, and which movement was set forth in theory by Thebit.”[285] The Emperor Charles V, when in Pavia, we are told, had his attention directed to an armillary sphere constructed by Dondi in the fourteenth century.