Mr. Beatty Astronomy Movie Notes The Universe: Constellations-The 88 Constellations in the sky have been around for hundreds of years. oThey were believed to have many uses including: A Calendar Aide in mapping the world Gave position while at sea oThey were preserved by the Arabs. oImportant landmark believed to be related to Orion’s Belt is The Pyramids of Giza in Egypt. -Like the Earth, the sky can be viewed as a sphere on which the constellations are visible. oOn Earth we can define our location on a map using coordinates of Latitude and Longitude. In the celestial sphere of the sky there is a way to determine location similar to on Earth. •Declination– Similar to Latitude •Right Ascension– Similar to Longitude -In ancient times, as well as today, location while at sea can be determined using a tool called a Sextant. -Telescopes have many uses but cannot tell the distance of a normal star from Earth.