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Portrait of Hipparchus

Hipparchus

Hipparchus was an ancient Greek astronomer, geographer, and mathematician…

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28 worksheets · answer keys · full story · quiz · Ages 3-5 · CEFR A1

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Hipparchus: The Star Mapper

Hello! My name is Hipparchus. I was born a very, very long time ago, around the year 190 BCE. Back then, there were no cars or bright city lights. My favorite thing in the whole world was looking up at the big, dark night sky. I would watch the moon and all the twinkling stars, and I always wondered about them.

Every night, I would go outside to my special viewing spot. I wanted to remember where every single star was, so I decided to make a map. It was like drawing a giant connect-the-dots picture of the sky. Around the year 129 BCE, I carefully noted where each star was and how brightly it shined. It was the very first map of the stars like it, and it helped sailors use the stars to find their way across the big, wide ocean.

I also loved playing with shapes, especially triangles. I discovered that I could use triangles to measure things that were very far away, like the moon and the stars. It was a brand new way of doing math. I lived to be about 70 years old and passed away around 120 BCE. I spent my life learning about the amazing universe. People still use my ideas about stars and shapes to explore the sky today.

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About

Hipparchus was an ancient Greek astronomer, geographer, and mathematician, considered one of the greatest astronomers of antiquity for his systematic observations, discovery of the precession of the equinoxes, and creation of the first comprehensive star catalog.

Born 190 BCE
Died 120 BCE
Active Period of Observation 147 BCE - 127 BCE (circa)
Discovered 127 BCE

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Hipparchus
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