Firsts in the world : Volume - IV

»»    First country to make education compulsory : Prussia

»»    First country to make a constitution : United States of America

»»    First man to set foot on the moon : Neil Armstrong

»»    First female Space Tourist : Mrs. Anousheh Ansari (Irani - American)

»»    First man to win Nobel Prize for Medicine : A. E. Wonn Behrig (Germany)

Sextant

Sextant : Sextant is used by navigators to find the latitude of a place by measuring the elevation above the horizon of the sun or another star; also used to measure the height of very distant objects.