Lesson 2 — 3.1 The night sky

• Astronomy — The night sky
• Middelbare school
• havo, vwo
• Leerjaar 1

Period 4 — Astronomy

3.1 The night sky

This lesson

Recap

3.1 The night sky

Working independently

Learning goals

• Name several objects that are found in space
  
• Describe what a star, planet and moon are and how they relate
• Describe the difference between a comet, meteor and meteorite
• Explain what a satellite is

Recap

The earth from

6 Billion kilometers

Some facts about our universe

• The earth distance from the sun is called the 'goldilocks zone' — since it's uniquely ideal for life.
  
• All stars that you see in the night sky are other suns.
• The sun makes up more than 99% of the mass in our solar system
  
• We call our galaxy 'The milky way galaxy'.
• All elements originate from suns. This means, we and everything around us are made of 'star dust'. 
•  Most of the universe is empty space (just like in atoms)
•  The earth is round, but the universe is actually flat.

The observable universe

1. The purpose of science is to investigate the universe so that we can come to understand it.
2. We can only investigate what we can observe.
   
3. We observe the universe through the light that reaches the earth.
   
4. If things are so far away that their light can't reach earth we are not able to observe it.
   
5. The part of the universe that science can investigate is called — The observable universe
   

The observable universe

• (Luckily, This is quite a lot)
  

3.1 The night sky

3.1 The night sky

3.1 The night sky

Orbit

Link

3.1 The night sky

Stars

Planets

Moons

Comets

Meteors and meteorites

Man made objects

Stars

3.1 The night sky

Stars

a large, burning body of mass around which planets orbit

Planets

3.1 The night sky

Planets

Wandering star

3.1 The night sky

Planets

Objects in orbit around stars

3.1 The night sky

Moons

3.1 The night sky

Natural objects orbiting

Planets

3.1 The night sky

Moons

3.1 The night sky

Jupiter has 79 moons

What are satellites?

Planets

Suns

Galaxy

Planets

Suns

Galaxy

Solar system

Planets

Suns

Galaxy

Solar system

Moons

The night sky — so far

• The night sky is filled with stars
  
• all stars are distant suns
  
• Planet orbit suns
  
• Moons orbit planets

• Comets

• Meteors 

• meteorites
  

3.1 The night sky

• Comets — Ice and dust in space

• Meteors 

• meteorites
  

3.1 The night sky

• Comets — Ice and dust in space

• Meteors — Rock in space  

• meteorites
  

3.1 The night sky

• Comets — Ice and dust in space

• Meteors — Rock in space  

• meteorites — Rock from space that reaches earths surface
  

3.1 The night sky

Man-made

objects

3.1 The night sky

Homework

Read: 6.1

Do: The workbook exercises — including E

Learning goals

• Name several objects that are found in space
  
• Describe what a star, planet and moon are and how they relate
• Describe the difference between a comet, meteor and meteorite
• Explain what a satellite is