an astronomer measuring the angle between two celestial objects, such as stars or planets, using a sextant, in order to calculate the distance and position of the objects in space, employing trigonometric principles.
an astronomer measuring the angle between two celestial objects, such as stars or planets, using a sextant, in order to calculate the distance and position of the objects in space, employing trigonometric principles.
an astronomer measuring the angle between two celestial objects, such as stars or planets, using a sextant, in order to calculate the distance and position of the objects in space, employing trigonometric principles.
an illustration of a man looking through a telescope
an illustration of a man looking through a telescope
an illustration of a man looking through a telescope
an illustration of a man looking at the moon through a telescope