Surveying
Circumpolar stars

Rotate round the North Pole
Rotate round the celestial pole
Are seldom seen near the pole star
Remain always above the horizon

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Surveying
A telescope is said to be inverted if its

vertical circle is to its right and the bubble of the telescope is up
vertical circle is to its right and the bubble of the telescope is down
vertical circle is to its left and the bubble of the telescope is up
vertical circle is to its left and the bubble of the telescope is down

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