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9 terms

astronomy

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Astronomy
Astronomy is the study of stars, planets and other objects that make up the universe.
the sun myths in Yolngu people
They thought that Walu, the sun woman lit a torch every morning an travelled east to west across the sky.
The sun myths in Ancient Egypt
The ancient Egyptians thought that a dung beetle pushed the sun across the sky
Main features of the sun
75% hydrogen and rest mainly helium. The closest star to earth. Changes hydrogen into helium by nuclear fusion. Diameter=1.4 million kilometres. Galileo discovered sunspots.
Stars
Produce heat and light.
Radio telescope
Uses radio waves to make photgraphs
Optical telescopes
Collect visible light using large mirrors. There are 2 main types of optical telescopes refracting and reflecting.
Reflecting telescopes
Uses a concave lens (=magnifying mirror)
Refracting telescopes
Two convex lenses(=magnifying glasses)