Galaxy Story

Tales of the Universe

Page 1 of 5

Since Ancient times, people have enjoyed looking at the sky and have wondered what is behind it, far far above the Earth. First, they just looked at the heavens with the naked eye. Hipparchus, an ancient Greek astronomer, was the first to create a catalogue giving the positions of one thousand stars across the sky.

You would be surprised by how much information can be gathered from stars simply by looking at them! The precision of naked eye measurements improved slowly with the help of simple viewing instruments. But the invention of the telescope in the beginning of the seventeenth century brought big changes to astronomy and made many new discoveries possible.

With larger and larger telescopes many more stars could be seen. Their positions could also be measured with much higher accuracy. New planets were found in the Solar System, and increasingly distant objects became visible to us.

Click on the thumbnail below to see the difference between telescopes and the naked eye for viewing distant objects.


How the Telescope Makes Objects Look Bigger

  

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