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6: ELEMENTARY ASTRONOMY
Introduction to Astronomy
The Concept of Astronomy
Explain the concept of astronomy
Astronomy is a branch of science which deals with the study of origin,evolution, composition, distance and the motion of all bodies and scattered matter in the universe.
  • Universe is the totality of space and time together with matter and energy.
  • Astronomers are the people who deals astronomy.
The Importance of Astronomy in Everyday Life
Explain the importance of astronomy in everyday life
Importance of astronomy include:
  • It was the earliest method of measuring time.
  • It was used to develop calendars that made it possible to predict the seasons.
  • It is used in navigation.-Helps us to understand the earth and the life it supports originated from and how it evolved.
  • It presents a new frontier for exploration.
Solar System
Stars
Planets
Emit their own light
Do not emit their own light
Twinkle at night
Do not twinkle at night
Appear to be moving from east to west.
Planets move around the sun from west to east.
Their temperatures are usually very high
Their temperature depends on their distances from the sun
Countless in number
There are eight in the solar system
Very big in size but they appear small because they are very far away
Very small in size as compared to stars.
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EcoleBooks | PHYSICS O LEVEL(FORM FOUR) NOTES - 6: ELEMENTARY ASTRONOMY

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