Vietnam or Thailand ? Vote for the TOP Country of the Week !
Updated: May 18, 2025
Their results are not yet completely reduced, but the best value deduced so far for the parallax is 8".807 +/ 0".0028. It consisted of a graduated metal circle, suspended by a ring which was passed over the thumb, and hung vertically. A pointer was fixed to a pin at the centre. This arm, called the alhidada, worked round the graduated circle, and was pointed to the sun.
Word Of The Day
Others Looking