Astronomer’s Tools Discovery Through Technology. Humans have created many tools to help explain the mysteries of the universe. Sun dials  help tell time.

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Astronomer’s Tools Discovery Through Technology

Humans have created many tools to help explain the mysteries of the universe. Sun dials  help tell time each day

Merkhet to chart astronomical positions and predict the movement of stars Quadrant Measures stars height above the horizon

Astrolabe Make accurate charts of Stars Cross-staff Measures angle between the moon and any given star

Telescope Study planets and stars Today, super-powerful optical and radio telescope’s operating from earth, satellites orbiting around Earth, and sophisticated space- based telescopes have shown us the immensity of objects in space and of distances across the universe.

Astronomical Units (AU)  Used to measure distance in our solar system  One AU is equal to the distance from the center of Earth to the center of the Sun ( km)

Light Years  Used to calculate distances outside the solar system  It equals the distance light travels in one year ( km/s = 9.5 trillion km) If you wanted to wind a string 1 Light-year long around Earth’s equator, you would have enough string to wrap it around 236 million times! Light from the sun takes about 8 minutes to reach earth Ancienct Myia(45 min)