3.4 Stars

• Stars
• Middelbare school
• havo, vwo
• Leerjaar 1

Astronomy

Stars

This lesson

• Recap
  
• The size of our sun
  
• Why the night sky changes
  
• The constellations
  
• The life cycle of a star
  

Learning goals

Name the names of several stars

Name the name of the two pole stars

Explain why the night sky changes over time

Describe what is meant by a constellation

Describe the life cycle of a star

Stars

How big is our sun?

The solar system

A simulation

Initiate

The two pole stars

Polaris

Sigma octantis

The constellations

• A collection of stars in which we can see a pattern
  
• This idea is estimated to originate in pre-historic times
• Easier to recognise that individual stars
• The constellations can give us a map of the night sky

Aquarius

Aries

Cassiopeia

The life cycle of a star

The life cycle of a star

• What is the life cycle of star?
• Do this in pairs, write down what you know
• Do not use the book
•  5 minutes

The life cycle of a star

• Nebula — gets pulled together by it's own gravity
  
• This starts a process called nuclear fusion (hydrogen turns into helium)
  
• The main sequence
• Red giant — white dwarf — black dwarf (invisible)
• Super red giant — supernova — neutron star — black hole

Nebula

Main sequence star

Nucleur fusion

Homework

3.4 The workbook exercises

Learning goals

Name the names of several stars

Name the name of the two pole stars

Explain why the night sky changes over time

Describe what is meant by a constellation

Describe the life cycle of a star