Affect Of Stars
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Transcript of Affect Of Stars
Affect Of Stars
Jesse Garcia
Polynesians
• They used a type of celestial navigation system called wayfaring, which means they used information about the stars, sun, moon, planets, ocean and trade winds to know which way to go.
• They built boats with a system of rungs that would line up with key stars on the horizon for the navigator to tell direction.
The Vikings
• They primarily used coastal navigation which means that they kept land in sight.
• But when they traveled across the Atlantic ocean they used a sun compass, which could tell them direction by casting a curved shadow onto a disk with notches carved on it.
Ancient Greeks
• The had a guy named Ptolemy, who was the first to make maps using stories from travelers and sailors.
• They also were the first to use latitude and longitude to tell positioning on a map.
Europeans
• They also used celestial navigation. They used the rising of the sun to orientate them from being east or west.
• And they used the positioning of navigational stars to orientate whether from being north or south.
Important Stars For Navigation?
• One is the North Star, called Polaris, which is a part of the constellation Ursa Minor, commonly known as the little dipper.
• Second is the southern cross. Which is a constellation of four stars called Crixa, two of which point towards the celestial south pole.